SCIENTIFIC ABSTRACT LEBEDEV, V.V. - LEBEDEV, V.V.
Document Type:
Collection:
Document Number (FOIA) /ESDN (CREST):
CIA-RDP86-00513R000929030006-2
Release Decision:
RIF
Original Classification:
S
Document Page Count:
100
Document Creation Date:
November 2, 2016
Document Release Date:
August 31, 2001
Sequence Number:
6
Case Number:
Publication Date:
December 31, 1967
Content Type:
SCIENTIFIC ABSTRACT
File:
Attachment | Size |
---|---|
CIA-RDP86-00513R000929030006-2.pdf | 3.71 MB |
Body:
ACC'NRs
Fig. 1 - measuring thermccuple;
2 - therm"lement,
Orig. art. has: 1 diagram.
SUB CODE: 13o 14/ SUBM DAM 25,Tan65
2/2
LEEBEDEV3 V. V.
Omsk State Veterinnry Inst,
LEBEDEV., V. V.- "On the anthelminthic properties of carboc@v-,line, curbit see&, and
akrikhin (atebrin) in cedtodoseE of dogs and geese." Omkk State Veterinar-y Inst.
Qm,:k, 1955.
(Dissertation for the Degree of Gandidate in Veterinary Sciences)
SO: Kni7bnaya Letopist No. 20i: 1956
USSR/Frr.,.i Anin-16. S,.-,c!ll Hornod Orttic Q-3
Ab,, Jour : Rof Zhur - Biol., Ile 11, 1958, No 90008
Author : Lckonlcin A.I., Lob
a@@v Y.,Y--
Inct : Voronc7,h Univorrity, Society for llatuml Stuey
Title One '4cthod Invcsti,@;rting the Ilrinldn- Ro-etions in LrrEc
Horned Cattle.
Orig Pub Byul. 0-v- yogtortvoi,pyt. pri Voroncnhslc. un-to, 1956, 10,
105-105
AbFtr.-ct .n inTt,-llrtion iF rropo:-cd which utilizcc@ -n -utcy.-,rtic ;,rtcr
dispcnfor x..rlth rovr-.r-1 -@iodific-tionr. Thiz- inct,-11,-tion
pcr-itf to @tudy tha Arinkim- rcrction, in -nkicl@-, to co@-
putc the :7r--.ountr of virtor vhich th@y comimic rt, vrriouE
fccelinZ;E -nd wriouF 1-cepiw- conditionf . Alro, it per:-.,i".s
to ob-orvc speed rnd chcrretariftics of the p,-rticip-ting
drinkin,- rcflcx.
C.-rd 1/1
29
,ri,, s 17
v
Phannia-cology s-nd Toxict-lorry. Cholinergic Agents
PifhPiol,j, .1.5 195
3. 3
Lel--adEv, V, V,
Inatit%its
B`-,'@jct of ArAcolirn or, Purtction,- 0-i" I-ho "atin
leor -
, @ tion of' the of' Dogs, Fr6e fa,,cm
va-ulon and Dur.L-ig
CRIG. PU3. Tr.
J.
Ll
IBBEDEV, V.V.
Pharmacology of acrichine, Farm* i toks. 21 no,2:71-72 Mr-Ap 158
(MIRA 11:6)
1. Kafedra fnrmakologii (%av. - prof. N.P. Go+orov) Omskogo
veterinarnogo instituta.
(qUINAGRINE,
phArmacol. (Rus))
A=`11R-_-W?6004S50' SOURCE CODE: UR/0108/65/020/010/0036/0037
(Active member)
AUTHOR: _Le
ORG, Scientific and Technical Society of Radio Engineering and Electrocommunicationi
(Nauchno-tekhnicheakoye obahchestvo radiatekhnild I elektrosvyazi)
TITLE: Permissible Irregularity of the amplitude -frequency characteristic of C@P?
recirculators
SOURCE: Radiotekhnika, v, 20, no. 10, 1965, 36-37
TOPIC TAGS: recirculator, spectrum analyzer , frequency characteristic, radio
si nal,' frequency shift
AMTRACT: The frequency characteristic of a spectrum analyzer having a shifting
mixer in the ring is considered. As the signal eing recirculated Is shifted along the
frequency axis, its amplitude varies t khe irregularity of the real frequency
characteristic. Simultaneously, the signal summation takes place; by selecting the
shape of the frequency characteristic, a summation with a desirable weight function
can be achieved. Formulas are derived which describe the connection between the
frequency-characteristic shape and variations of signal amplitude with circulations.
From these formulas, the effect of the characteristic irregularity upon the maximum
permissible numbor of circulations is doduced. Orig. art. has, 2 figures and
10 formulas.
SUB CODE: 09 SUBM DATE: 07Dec64 / ORIG REF: 001 / OTH REF: 003
Card UD C: 6
11 @
OL.orlik,-e and harvestln@, of ruA-crops. , @'a3 . i-.6 -vo se I kho z i Ii. UZ[IO-Xooj)er at I vroi
lit-r , U'l. 2) j.
y
-,:, 0 @', L@ I , V . i - , t'C @
'V:anual and reference bok )n tie siloinE of the for-@r-e. ':o!@*-.,va, !II-L' .0.
-,-r -.. : - - @
; . . ]@ , @ .@ @ @, - , - I - @ @ 17@ @@' , ;@ ;' , 11 . . . . -.
, ... .- , , ;"@ @ I ., - - ,
LZD37-DZ7, V. V.
7 0:1-10 ! olii - V s-5: "aucn ctcl@;,@t
S. '707
i,-C, e@
S C- Lo-@ t o -,, il -s "o
'v. V.
Ozelenenie sel'skikh naselennykh punktov fLandscaping of rural settlements
,7.
Kuibyshev, obl. izd., 1952. 72 D.
SO: Monthly List of Russian Accessions Vol. 6, No. 5, August 1953
LEBEDEV@ 11. IV.
Windbreaks, Shelterbelts, Etc.
Afforestation plan for the Vetlyanka irrigated area. Les i step' 4, No. 2, 1952.
9. Monthl List of Russian Accessions, Library of Congress, June 1952. --A4W, Uncl.
@ .: @@- -Mf -*- --
- -. -:i-, @- w@ @
. . .@' - @ - - - - I
-4-
13MKV,V.V., kandidat aellskokhozyaystvennykh naak; NIKIFOROVA.G.V.,
"=nac n@y sotrudnik; OLF.SOV,N.K., nauchnyy sotradnik
Filbert variety testing at the Zakataly branch station. Trudy
VXEII no.10:75-83 154. (KLRA 8:9)
(Filbert)
@ [ , - - I
IGNATINKO, Stepan Vq@ijlyevich; LIBEDEV,_V.V redektor; PAVLOVA. M.N..
tokhnichaskly redaktoi- -- IWOW I - ,
LTraining and pruning fruit trees in the central part of the
U.S.S.R.J Formirovanie i obrezka plodovykh derevIev v orednel
polose SSBR. Moskva. Goa. izd-vo sel'khoz.lit-ry, 1957. 69 p.
(Pruning) (MLRA 10:6)
LHBNDSV, Vladimir Vasil'yevich
[ShdIfe'rbelt- afforestation in irrigated areas] Zashchitnoe leso-
rasvedenie na oroshaemVkh zemliakh. Moskva, Goo. izd-vo selkhoz.
lit-ry, 1957. 102 p. .(MIRA 11:4)
(WindbreakEi. shelterbelts. etc.)
F
r b
SHAMPAKIYA, Poll (Champagnat. Paul] VOROHOVA,
kandidat seliskokhozvaystvennykh nauk, nauchnyy redaktor; IZOTOVA.
Q,K.. redaktor; YELDCROBA. A.Y.. takhnicheskiy redektor
[Pruning of fruit trees. Translated from the Englishj Obrezka
plodovykh dereviev. Perevod a aagliiskogo. Moskva, Goo. izd-vo
sellkhoz. lit-ry, 1957. 158 p. (MLRA 10:6)
(Praning)
LARIGNOV, Aleksey Nikolayevich; LEBEDEV, Y.Y., red.; IWTKTA, Y.K.,
tekhn.red. -
(We'll complete the seven-year plan ahead of time] Samiletku
vypolnim doaroohno. Moskva, Gos.iZd-vo sel'khoz.lit-ry, 1960.
85 P. (MIRA 14:1)
1. Sakretarl Ryazanskogo obkom Kommanisticheskoy partii Sovetskogo
Soyuza (for Larionov).
(Ryazan Province--Agriculture)
LEDED.'--'V, V.V.
RT-1151 (Ice accretion in Arctic rivers and seao as a function cf ne,-aLive air temperatures)
Rost 11da. v Arkticheskikh rakakh i moriakh v zaltisimo3ti ot otritssntalfmi@@-i
vozdukha.
PRODUE!,ff ARKMII, (5-6): 9-25, 1938. (T?an,-latdon does not include illustxitions).
LEBZDF,V, V. V.
Gldrologlchanklye Issledovanlya i ragehety pri provelctirovanniimostov I trub.
Leningrad, 1949. 30.1p.
A practical manual for techniciAns and engineers engaged In bydrological research and
calculation necessary for the designing of bridges for railroad and automobile highway
bridges; published as a Hydrometerological 14ition.
1. Russian-Railroads-Bridgen
Russia --- Roads-Bridges.
3- Russia Tunnels
4. Rassia-Road Research
i. Hydrological Research and Calculations on the designing of bridges and tannels.
ii. Titin
I,-6Bz-D---V, V. V.
GidroloSeiia i ..,idranetriia v zadachakhC roble"ns on hydrology and hydroiactr-z. Posobie
dila vysshil,-,Ii uchc'onyldi zaveclenii. Leni.-.,;rad, Galdrotaeteoi-dat, 1952. 5060 T).
SO: Rontha-v- List of RMgsien v ol. 6 E0. 7 October 195",
IJQ 17- VladiMIA11mas" Iyevi "h* kandidat tekhnicheskikh nauk; CHEBOTARET,
A.I.,---7-eclan.or; -5ULUMCHIK. A.k., takhnicheski7 reclaktor
[Nomograms for h7draulic calculations; supplement to the book
lltrdrolog7 and hydrometr7 In problems."] Nomogrammq dlia gidrologi-
cheekikh raschetov; prilozhenie k knige "Gidrologiia I. gidrometriia
v zadachakh.11 Leningrad, Gidrometeorologichaskoe izd-vo, 1954. 29 p.
tables. (MLRA 8:4)
(Erydraulic engineering--Tables, calculations, etc.)
LUCHSH&VA, A.A.; WSMY, V.V.. kandidat takhnichaskikh nauk, redaktor;
YASNOGCRODSKAYA, M.1w redaktor; SOLOVITCHIK. A.A.. tokhnicheakiy
redaktor
(Practical hydrometry; exercises in hydrometric observations]
Prakticheakaim gidrometriia. Uprazhnenlia po obrabotke gidro-
astrichaskikh nabliudenii.,Izd. 2-e. Pod red. V.V.Lebedeva. Lenin-
grad, Gidrometaorologichookoe izd-vo, 1954. 335 P. (KL'RA 7:10)
(Stream measurements)
CROOTARLY, V.I., kandidat takhnicheskikh nauk; SKM, A.P., kandidat
takhniebaskikh nauk; LRBIDIM, V.V., redaktor.
--
.1 -
(Hydrometrical Installations] Gictrometricheakie zooruzheaiia.
Leningrad, Gidrometeorologichaskoe izd-vo, 1954. 368 p. (KLRA 7:7)
(Flowmeters) (Hydraulic engineering)
,,,LEBTIMEV, Vladimir Vasillyevich; CKEBOTAREV, A.I., radaktor; BRAYNINA,
- " 4.' -?t'J.`,-@f*kbnIc'I@eskiy redaktor.
[Hydrolog7 and hydrometry in problems] Gidrologiia i gidro-
metriia v zadachakh. Izd. 2-a. Leningrad, Gidrometeorolo i-
chaskon izd-vo, 1955. 550 P. (MLRA 8:9@
(Yqdrolog7)
I -- - I' .) 1- .
KARAUSHXV, Anatoliy Vasilleyvich; PANCHURIM, Nikoley Aleksandrovich;
MAKTAYET doJrtQr tekhnicheskikh neuk. professor, redaktor;
- LYLBEDST V.Y., redaktor; VCLCHOK, K.K., tokhnicheskiy, redaktor
[Collection of problems in hydraulics] Sbornik zadach po gidravlike.
Pod obahchei red. Y.M.Makkaveevs. Leningrad, Izd-vo "Rachnoi
transport,* Leningrootd-nie, Pt.2. 1957. 197 P. (MLRA 10:9)
(Hydraulic engineering--Problems, exercises, etc.)
LEBEDBY, nadimir Yaoilly8vich; TASIICGORODSKATA. M.M., red.; FLAUM, M.Ta*9
__t6khn._r6(f. '
[Hydrology and hydraulics in bridge and road construction] Gidro-
logiia i gidravlika v moatovom 1 dor02hnOM OtroitOlletve. Lenin-
grad, Gidrometeor.iod-vo. 1959. 387 P. (MIRA 13:3)
(Hydraulic engineering) (Hydrology)
. LEBEDEV, Vladimir Vasillyevich; DAVYDOVI L.K., doktor geogr. nauk, prof.,
retsenzent; YASNOGORODSKAYA, M.,. ., red.; BRAYNINA, V.I. t . red.
w , ekhn
[Hydrology and hydrometry in problems] Gidrologiia i gidrometriia v
zadachakh. 3. dop. i perer. izd. Leningrad, Gidremeteor.izd-vo, 1961.
699 P. (MIRA 14:12)
1. Zaveduyushchly kafedroy gidrologii sushi Leningradskogo gosudarstven-
nogo universite-a (for Davidov).
(Hydrology)
LEBEDEV, Vladimir Vasillyevicih
[Hydrology] Gidrologiia. Leningrads Izd-vo "Rechnoi trans-
port," 1959. 192 p. (Hydrology) (14IU 15:2)
--- : ",
-i-@ . I .. @-- ;
LEBMEV, Vladimir Vasilly@evich; BELOUSOV, N.F.., inzhof nauchno
rigd- _-_.
0
(Hydrological and water-management calculations for de-
signing water-supply structures] Gidrologicheskie i vodo-
khoziaistvanmye raschety dlia proektirovaniia sooruzhenii
vodosnabzheniia. Leningrady Stxoiizdat, 1965. 395 p.
(MIRA 18:12)
4'@2@00
B/1081188
@?1@016/001/007/007
BO1O/TtO77
AUTHORt Lebedev, V. V.
TITLEt Discrete Representation of a Time-limited Signal
PERIODICALs Radiotekhnika, 1961, Vol. 16, No. 1, pp. 75 - 80
TEXTs Referring to studies of V. A. Yotalinikov and K. Shennon, the
representation of a time-limited signal by a finite series is shown
which, contrary to the Kotellnikov series, describes the signal by using
discrete values within a time interval O-T. The author discusses topics
like estimation of errors, spectroscopic analysis, and references to the
Kotellnikov series. The series in question can be obtained directly from
the Fourier series for a function (F(t) which is defined for a time inter V/
val O-T and vanishes identically outside this integral, if summation is
discontinued at a finite value of the summation index. Denoting the
frequency connected to this summation index by f v transforms the Fourier
f T f T
v v
series J(t) a + sin n(jit + @.oos nc,),t making use of the sums
0 n
Card 1/4
Discrete Representation of a Time-limited S/108/61/016/001/007/007
Signal B010/B077
1P z i k-1 )sin n ci t -11 2 t@j(t )con n ci t which correspond to
n k @;f(tk 1 k9 @n _k 0 k 1 k
the integral expressions for T n' In' where tk - ktAt (At is a time
element of interval O-T) into a new series
2fvT sin 6) T(t - k4t)
Ct) - :@:I(k&t) - 1 %-1) with wV . 2z fv , k - 2fvT + 1;
63 sin -1 (t - k&t)
v X T
the convergence properties correspond to that of a Fourier series.
According to (5) it is possible to describe a function limited to the time
interval O-T by 2f vT discrete function values of the basic time intervals.
Fig.1 illustrates the approximation function of (5). A simple calculation
is only necessary to show that (5) goes over into a Kotellnikov series if
the interval T approaches infinity keepingto v fixed. The error of (5) is
estimated by the method of Fourier series; here, the error is connected
with the residual energy of the signal above the limit f v The author
Card 2A
88 80
Discrete Representation of a Time-limited S@1108V611016100110071007
Signal B010/B077
concludes his paper by giving the spectroscopic separation of the signal
represented by (5); he Bets (@(t) - ?(t)A(t) with A(t) - I within t'he
interval O-T and L(t) - 0 outside of it; q(t) denotes the periodic
function having a period T. The spectrum of T(t) is calculate'd from
00
y(v)A(cj-v)dv (7), where A(cj) denotes the well-known spectrum of
A(t), and 9(cj) the spectrum of q(t) which can be represented by a-kourier
series if a Dirac 6-function is used., The following series is obtained
f T
v sin T(,@;-2nn/fl
from (7) for the spectrum of the signal (5): (_Vcj)- T_y(n) T (p, -2 it n/ T)
_f T
v
y(n) is the coefficient of the Fourier s-@ries for y(sj). There are
2 figures and 13 references: 12 Soviet and 1 British.
SUBMITTED: February 1, 1960 (initially), March 4, 196o (after revision)
Card 3/4
S/IW62/ooo/oWooVoo
A055/A1O1
AUTHOR: Lebedev, V.V.
15@_ '___ I
TITLE: Graphical calculation of automatic gain control filters in recetving
systems
PERIODICAL: Elektrosvyaz'16,
, no. 6, 1962, 10 - 21
T M Starting from the well-known equation characterizing the frequency
properties of the automatic gain control (for small increases of the input sig-
nals), the author deduces two formulae giving, respectively, the distortion of
the modulus and of the phase of the amplifier output voltage for different modu-
lation frequencies:
14) (92 )1 = I I are tg R sin T_
1/1 + 2 R cos (P + R2 (_ I + R cos CP
where is the amplifier frequency response, is the modulation frequency,
y is the phase shift of the output voltage envelope, q? is the phase shift in
the AGC filter and BW R (2) e'q , W being the frequency response
Card 1/3
,9/106/62/000/006/002/003
Graphical calculation of automatic gain .... A055/A101
of the AGC filter and B 1 being the rigidity of the control. The au-
thor plots the graphs of ;fa3and IV as functions of R ( a) for different
fixed values of y (two sets of graphs are reproduced in the article). These
sets of graphs permit plotting the frequency response of an amplifier with AGC
for the case of any concrete AGC-filter [the R (92)-axis being replaced by the
@2 -axis]. On the basis of the plotted graphs, the author analyzes the following
problems: 1) AGC stability. 2) Operation of the AGC in pulse receivers (the
case of simple RC-filters is examined in particular). 3) Transients: the author
compares various filter-types in the AGC-circuit, giving the sam6 permissible
phase distortions at a determined frequency (620, from the point of view of the
setup time (the compared filter-types are the simple RC-filter, the filter of
the second order with phase correction o(, = 0.24 and the double RC-filter
rC 1
T2 = 242). 4) Demodulating properties of the AGC. In the last part of the ar-
ticle, the author describes a method1br calculating the AGC, this calculation
being divided into two independent parts: 1)Ensuring the required stability of
the output level of the signal. 2) Calculation of the AGC filters that permit
obtaining the required phase-frequency characteristic. The author calculates a
Card 2/3
s/io6/62/000/006/0()2/003
Graphical calculation of automatic gain .... A055/A1()1
simple RC-filter and a filter of the second order w1th-phase compensAtion. Three
@umerical- examples of AGC-filter calculation are reproduced at the end of the
article. The Soviet personalities mentioned in the article are: Ya.Z. Tsypkin,
G.P. Tartakovskiy, N.I. Chistyakov and A.A. Rizkin. There are It figures and 1
table.
SUBMTTTED* January 12, 1962
Card 3/3
y
LEEEDEV, VGv,
A nonlinear problem on automatic gain control. Radiotekhnika
17 no.608-41 Je 162. OURA 150)
(Radio)
14BEDEV, V.V.
Use of a recircillator for the contraction of frequency-modulated
signals. Radiotekhnika 13 no.11:62-70 N 163. (YJRA 16:12)
1. Deystvitellnyy chlen Nauchno-tekhnicheskogo obshchestva
radiotekhniki i elektrosvyazi imeni Popova.
KIST-Illsv, B.P.; BALASHOV, V,L.; FnLCHIN, A.A.; LEBEDEV, V.V.
Separation of barium and itrontium by the exchange rm@thorj in
the system amalgam - solutioni. Hadiokhimlia 6 no. 1,114-
117 164. (MIRA 1726)
L 11386-65
At@-CESSION NR: AP4046677 S/0109/64/009/010/1776,11780
AUTHOR: Lebedev, V. V.
12
TITLE: Signals sunuped by a recirculat-or.
ISOURCE: Radiotekhafka t elAtrouLka, v. 9, no. 10, 1964, 1776-17'30
TOPIC TAGS: recirculator, recirculating stbrage. signal storage, summabillty,
sqr-namble signals
ASTRACT: A theory is' developed to show that a recirculator can be used as a
storage device for a broad class of signals. Regarding an arbitrary signal as
S(t) c A(t) sin 8 (t), where A(t) and 0(t) are its amplitude and phase, respectively,!
conditions of its "phase sunu-nability" are analyzed. The recirculator is able to
perform a cophasal sun=-atioa of all signals whose phase increment over the
dclay-line time T is a multiple of ZF. Of all possible functions describing the
nrne variation of the signals to be summed, two types (a) continuously time-
I n386,65...
-ACCESSION MR: AP(0@46477-,--
--7-
---- -- r3
ar
furittions~and~.(b)-,continuously fze tions,
atsuramable funct
wquenqy
-ati&ana Yze e
out:
quencies
7T
can be continuously tim: 0--surnmed in a recir6ulator having a circulating time Ti,
G-haracteristics of the class of frequency-summable signalls are described; the
freqxiency-summation recirculator is held stAtable for operation aa a spectrum
aralyzcr and as a storage-type filter "or isolating a desirable signal from ncise.
L
-thor wishes to thank 1. S. Gonorovskiy for his attention and help in
prepariag the article. Orig. art. has: 3 figures and 18 formulas.
ASSOCIATIO1,4: none
SUBMITTED: 07Aug6i 'ATD PRESS: 3114' ENCL: 00
SUB CODE: EC, DP NO REF SOV.- 006 OTHER., 001
Z/z
RTP@j , J@ - - - I @ ekhr . nauk ("os h-vj ' ; '):,7 i- I I.' I V . , inzh. (IMosh-va )
Gi!@Ac@ of ul, tvio corr,--Alnp- st-e-ac-'-, -@f
@;Ys telas wi, th oper at ive, a c . i., ler-A." -,L(; h e 3 t'vo 11 o . 8: 8- 3"; Ag 1164.
(MIlbA 17:111
I-ACC-NRI-
AP6033396
SOURCE CODE: UR/0293/66/004/()05/0731/0739
AUMM Kolchin, A. A.1 Lobodev, Ve V.; Skrobtsov, G. P.
ORGs. none
TITM.. Geometric factor and the directional diagram for single crystalline detectors
and for a coaxial telescope
SOURCj3t Xbsmichesklye issledovaniya, v. 4. no- 5, 1966, 731-739
TOPIC TAGSz radiation detector, coincidence counting
9STRACT: The authors are concerned with the interpretation of the number of nuclear
particles recorded by a detector in terms of the intensity of radiation* For an
isotropic radiation, the geometric factor is given by
-'N
where'I is the intensity of particles and N is the number of recorded pulsas. For a.n-
single infinitely thin detector with an area S and for an isotropic radiation,
IV MsinkosOdOdq, (2)
.ACC NRt AP6033396
Vnere e is the zenith angle, azimuth, and r =-J(- S. The authors calculate Pfor
two cases; cylindrical and square base detectors of finite thickness. Next, they
derive r for a coaxial telescope (two thin coincidence detectors), Finally, they
derive a directional diagram for tho'case vhen the radiation is anisotropice Orig*
arts hass 6 figures and 20 equations*
SUB CODES 03/ SUBM DATES zwebM/ oRiG REFS 002
Card
MTF
L1520_65 rl(j)/,WT(M) E-r-F(c)/PPF~n)-2/L'PR/LVP(J)/T-2/Et,/P(b) Fc_h/Pr_h/P9_h/
pu-4- ir YMM/mr-1
ACCESSION NR: AT4=19o S/0000/64/000/000/0118/0124
AUTHOR: Lebedev, V, V.; Krichko, 1. B.
TITLE: Thermodynamics 9,? the reactions of niabium tantalum and hafnium oxides
with carbon and methanep 7 7
SOURCE: AN5S�R. Institut goryuchikh lskopayemy*kh. Gazifikatslya I piroliz
topliv (Gasification and pyrolysis o fue ; s6orn-Tik statey. Moscow, lzd-vo Nauka,
1964, 118-124
TOPIC TAGS: nioblum oxide, tantalum oxide, hafolum oxide, carbon, methane, metal
carbide, free energy
ABSTRACT: The thermodynamics of 18 reactions between the oxides of niablum, tanta-
lum and hafnium and carbon or metha `!were studied and the variation of the free
energy with temperature Is __Nanei all of them. Because of the absence of
plotted fo
thermodynamic functions for carbides, metal oxides and metals at temperatures above
400OK, the free energy is calculated only up to 4000K. The reaction of the forma-
tion of metal carbides from Ta 0 Nb 0., Hf02 and methane proceeds more completely
Je51w,tg 5
than the reaction of metal oxi s carbon at the same temperature. The loga-
rithmic values of the equilibrium constants of the reactions of Ta205, Hf02 and
&T5Mth methane and carbon at 800-4000C are tabulated and plotted. Metl-a ne is
a 2
L 15206-65
ACCESSION NR: AT4048190 C-)
preferable for obtaining metal carbides because the equilibrium constant for the
combination of metal oxides with methane is higher by several orders than that
for carbon. The equilibrium composition of gases at different reaction tem-pera-
tures is tabulated. The variation in the degree of conversion of methane at
different temperatures during Its reaction with Ta205 and Hf02 until the formation
of tantalum and hafnium cr tantalum and hafnium carbides is plotted. For these
reactions, It Is characteristic that the conversion of metal oxides to carbide
proceeds at lower temperatures than their conversion to metals. The complete
conversion of Ta205 to TaC proceeds at 1300K, to metal at 1500K. For hafnium,
this temperature difference Incre3ses to 550K, the two temperatures being 1450
and 2GOOK. Orig. art. has: 9 figures, 2 tables, I formula and 18 chemical
equations.
:ASSOCIATION: none
SUMMED: 014A@-r64
NO REF SOV: 016
Card 2/2
ENCL: 00
OTHER: 00@
SUB CODE:TD,OC,IC
sov/86-58-10-27/4o
AUTHOR: Lebedev, V.V., Engr Maj
TITLE: Adjustment of Engines with Turbo Starters (Regulirovka
dvigatelya s turbostarterom)
PERIODICAL: Vestnik vozdushnogo flota, 1958, Nr 10, PP 70-73
(USSR)
ABSTRACT: This is a discussion of the adjustments necessary in
jet engines, and of pertinent phenomena and difficul-
ties. The superadded fuel fed to the accelerating
engine must be strictly controlled; at ground level,
the superadditions must not exceed the safe figures
which, for early engines, are about 170 to 70 percent
above normal. The fuel-air mixture, excessively rich
in fuel, leads to faulty engine operation; the engine
must then be stopped. At low speeds, the accelera-
tion is controlled by the automatic pickup device
(avtomat priyemistosti), and at high speeds by the
Card 1/3
AdVUstment of Engines with Turbo Starters sov/86-58-10-27/4o
hydraulic decelerator (gidrozamedlitell). The accelera-
tion of the engine is delayed for a short time while-
the automatic pickup device is being taken over by the
hydraulic decelerator. The engine pickup is adjusted
by tuning the automatic pickup device and the hydraulic
decelerator. When the adjustment of the automatic -
pickup device is changed, the acceleration of the en-
gine changes only within the range from low speeds to
3,000 rpms, and when the tuniM of the hydraulic de-
celerator is changed, the acceleration changes at
speeds above the cruising value. Within the range
from 3,000 rpms to the cruising rpms, the acceleration
of the engine develops highest valuesand, practically,
does not depend on the adjustment of the above devices.
A substantial change in the tuning of the automatic
pickup device may result either in an excessive supply
of the super-added fuel or in an insufficient supply of
fuel with ensuing difficulties In both cases. With
the 'ailtomatic pickup device (at up to 3,000 rpms), the
Card 2/3
Adjustment of Engines with Turbo Starters sov/86-58-10-27/4o
8-to-10 see. periods of acceleration are recommended in
order to get the most favorable fuel superadditions.
Some details on the adjustment and tuning are giverr.
The reliability of the starting of turbojet engines on
the ground depends also, to a large degree, on the a-
mounts of the fuel superadditions.- Engines with high-
power tarbo starters start relatively easily, except
that some difficulties may occur in the spring or fall,
but this can be remedied by taking adequate measures;
details are given. The change in the fuel pressure be-
fore the fuel nozzles, at about 300 rpms, affects the
starting operation very greatly. The change in the
adjustment of the automatic pick-up device affects the
starting, too. If the automatic starter and automatic
pickup devices are tuned to exceBBive or to too small
fuel superadditions, unsatisfactory starting may re-
sult. Three graphs.
Card 3/3
LEBED.EV V V inzhener-mayor
_:_@ , , , I
Take--,)ff boost of the engine. Vest.V.:)zd.F:L. no.2:71-78 F 161.
(MIRA 14-7)
(Airplanes-Jet propulsion)
PEPMAKOV) V.A., kand.tekhn-nauk; DANHYITKOVA, N.I., inzh.; LERiMEVj,_V.V.j,-
inzh.
Use of models for studying the aerodynamics of the gas channels of
T.P-90 and TP-100 boilers with T-shaped arrangement of the components.
Teploenergetika 6 no.5:45-52 My 161, (MIRA 14:8)
1. TSentrallnyy n&ichno-issledovetel'skiy kotloturbinnyy institut
imezxi I.I.Polzunova i Turbinno-kotellnyy zavad.
(Boilers)
YELETSKIY, V.S.; LOEDEV, V,V.
Transistorized doubJr. d--pulse gerterafz@r, Bi-ul. tekh._ekOrL. info=.
Goo. nauch.-ifird. inzit. tiauch. i tcjkh. inform. 17 no.2-43-44
164. (MIRA 17:6)
AUTHOR: Lebetlev, V.V,, 32-3-47/52-
TITLE: A Dev,ze for Irwestigat-ing Reaction, 7Tr.-1,oc:.'ty by the Autoff"ati-,
Recording of Kinetic Cur7es (Ustanalyka. .21ya -_*_-u&henjya skorosti
reaki-si-y s a.,vtcinaticheskoy zap!_,-j'yL: k-_'neiALcheski!,h kri-rjkh)
PERIODICAL Zavoilskaye. labormtorlya, 1958, Vol. 2i4-, Nr 3, PP- 372--373 (USSR)
ABSTRACT, A -method of investigating _-edoz r-.ac+,--cns of metals was worked
Th@, Flevice necassary for this purpose con3@_sts, as may be
ze,;A-i from a _nchemat'ical dravirg, Ji.-c-, yriinclple of two systeirs which
'@e .1 e vr
rjan connected. in the flrat sysil-em 'here ara two thre - ay
f a a , e t s by in a arL3 o f -;h ch ' N, 'z vvo Fj @,r s tl c rz - ca n b e s epa ra t e d ax, i
z- V or
respectil-7-21y. Ona of 'he partv, wmcng other things,
contains a suct-ion p-=rp; The feeding arr-angement fo, - lvd.-ogen and
r Ltrog,,3n, oonn.-,@ct'.on yrith the 3.tMcsP',,_erc-, a rheometer, eto. , vinilst
-a ',he --econd tlner-, Is a :0,eain the apparatus
est,ablishdng @!ontart v@th the and co(ler, as vrell as a
sy,-t,-@m by mean5 of lrydrogen during, reduction Ls
recor-le". The in-.-e.-@`,-igation 4r@ measur-Lng t1hp conSuMpt4 o r
Car,' 1/2 of 'nydrogen (or f*@cffing o-rer '@;he heated me-1:-al
A Device for Inwr-*tigating Reacti::).n. Vr-lc),::i-,';y 1,,,
Automatic Rpcox-J-L@-.g of Kinetic Gunren
oxi3r., wii-'-dh Is neuessa)@@ for By mearw. of a suitable
a3--.i.-4=ent of the '@'aucatn -.hp. metal Yr-Ith 3t-eam
from 'he steam gen-@!ratuor can again be ox-!.di-zed so t*-iat Jilydrogen
ip@ prod-,.icea. A @-unre sho,,,ring vrate= lr@ the reductlor,
of inagnetite at 4500 C an-] a table of 4;1.-.t.@ a-ferage reduction ve-
loc-itien thierefrom .15 g-11-i-ren. There. are 2 figures and
I table.
ASSOCIATION: IrIS t`@,11-e of Mineral Fuelo P.S, USE-P.
iskopayemyl,"i kkade-mi-J.1. nauk. SSSH)
AVAILABLE: Ll:rjrary of Copgres@7.
1. Hydrogen r-orrumptio-.i--~2leasureire,-,t
-tite
a gm 3 -Reductioa
M
Card 2,/2
S.-Itut go1,7iucn-i1,-,1
2. Steam generetors-Applicr-tion
SOV/126-7-6-9/24
ArTHORS: Amonenko, V.M., Vasyutinskiy, D.M., Lebedev, V.V. and
Shapoval, B. I.
TITLE: Vacuum Distillation of Metals with Condensation on a
Heated Surface
PERIODICAL: Fizika metallov i metallo,edeniye, 1959, Vol 7, Nr 6,
pp 862-867 (USSR)
ABSTRACT; The properties of heat-resisting alloys are influenced
to a considerable extent by ;he purity of the starting
materials. Vacuum distillati)n is a promising way of
purifying such materials. Tie authors describe their
use for purifying iron of th@ method developed in 1952
at the Fiziko-tekhnicheskiy nstitut ANUmSSR (Physico-
technical Institute, Ac.Sc. *Tkrainian SSR) for vacuum
distillation with condensation of the metal on a surface
at a high temperature. The authors consider this more
efficient than published methods and they have used it
successfully for purifying beryllium (Ref 5). The
distillation of the iron was effected in a working vessel
(Fig 1) with evacuation by an oil diffusion pump
(2500 litres/sec) and a type VN-2 backing pump.
Card 1/4 0.5-3 litre alundum or beryllium-oxide crucibles wound
5@ T;"
JiV5
@.A
SOV/126-7-6-9/24
'Vacuum Distillation of Metals with Condensation on a Heated
Surface
with molybdenum or tungsten heating coils, contained the
metal. The heated column directly over the crucible was
generally lined with thin iron sheet, on which
condensation occurred. The temperature of the column
surface was chosen such that iron condensed while the
impurities remained vaporized: the lower part up to 13000C,
the upper to about 11000C. Assuming as a first
approximation that the condensing metal and impurities
form an ideal solid solution, the authors apply the
Knudsen-Langmuir equation to calculate rates of
evaporation. From a crucib Ie at about 1580*C evaporation
of metal occurred at 1 g/cm hr., 75-80% of which was
recovered at a column temperature of 1250-13000C.
Tables 1-3 show compositions before and after distillation
(single and double) of armco, electrolytic (single only)
and carbonyl irons, respectively. Purification from Mn,
Mg, Cu, S, P, N2 and 02 was good and somewhat less so
from aluminium. Considerable contamination from
Card 2/4 evaporation of crucible material was possible, but with
double distillation the impurities could be reduced to
SOV/126-7-6-9/24
Vacuum Distillation of Metals with Condensation on a Heated Surface
0.01%. The resistances of some long-needle single
crystals of iron in the condensate were compared at OOC
and at low temperatures in the laboratory of B.G.Lazarev,
acting member of the Ac.Sc. UkrSSR: the ratio values
agree fairly closely (Table 4) uith those of Itleysner (Ref 6)
for the purest iron and indicate that the needles were
99.996% Fe. The authors have also studied the purification
of high-carbon (7% C, 73% Mn) and medium-carbon
ferromanganese. The same apparatus was used, evaporation
temperatures being 1100-14000C. Rates of evaporation
tended to fall through impoverishment of surface layers
with manganese and formation of a graphite layer. Lower
iron contents were obtained when baffles (Fig 2) were
fitted in the column. On the lower baffles, kept at about
10000C, almost all iron condensed, the manganese condensing
mainly on the middle baffles (750-8000C). Table 6 shows
the composition of the condensate from the third and
fourth baffles. A carbon content of under 5 x 10 3% is
inferred. The purity of the manganese after a single
Card 3/'1 distillation is over 99.96%.
SOV/126-7-6-9/24
VAcuum Distillation,of Metals with Condensation on a Heated Surface
There are 2 figures, 6 tables and 6 references, 3 of which
are Soviet, 1 English and 1 French and 1 German.
ASSOCIATION: Fiziko-tekhnicheskiy institut AN UkrSSR (Physico-
Technical Institute, Ac.Sc. UkrSSR)
SUBMITTED: July 22, 1957
Card 4/4
SOV/126-8-2-14/26
AUTHORS: Amonenko, V.M-,'Shapoval, B.I. and Lebedev, V.V.
TITLE: Temperature Dependence of Internal Friction and Elastic
Constants of Pure Iron
PERIODICAL: Fizika metallov i metallovedenlye, 1959, Vol 8, Nr 2,
pp 249 - 254 (USSR)
ABSTRACT: The authors point out that in investigations of the
internal friction of iron (Refs 1, 2), the purity of
the metal has been insufficient for studying the nature
of the internal-friction peaks. For the present
investigation the authors used iron vacuum-distilled
by the vacuum-distillation method developed at the
Fiziko-tekhnicheskiy institut AN UkrSSR (Physico-
technical Institute of the Ac.Sc. Ukrainian SSR), in
which iron vapour condenses on a surface heat&d to
1 200 - 1 300 0C and covered with 8ure-iron foil.
Evaporation was effected at 1 600 C from alundum
crucibles. The distilled iron, remelted in a high vacuum,
was poured into 5-kg ingots (cast-iron moulds) from which
120 x 15 x 15 mm pieces were cut for shaping into test
Cardl/4
sov/126-8-2-14/26
Temperature Dependence of Internal Friction and Elastic Constalts
of Pure Iron
pieces - 10 mm in diameter and 100 mm long. Their 20-mm
long working length was turned down to a diameter of
3 mm. Before tests, the specimens were vacuuth annealed
at 900 OC for two hours and cooled. in the furnace. The
composition of the metal was: 0.00390' each C, 08;
0.00100 each S, P. Al; OM010.10 each N21 Mg; 0 - 0 070/0 Mn;
0.008-,.' Ni; 0.0006% Cu. The tests were carried out in
vacuum in a resistance furnace (Figure 1); for the
measuring circuit the system proposed by Tsobkallo and
Chelnokov (Ref 5) was used and test-piece oscillation
was produced by a self-oscillating system (V.A. Zhuravlev
Ref 4). The relative deform@tion on the test-piece
surface did Aot exceed 5 x 10 Figures 2 and 3 show
internal friction as functions of temperature. Figure 2
refers to pure iron without (Curve 1) and with (Curve 2)
a magnetic field of 100 oE. Curve I in Figure 3 refers
to armco iron and Curve 2 to vacuum-distilled armco iron.
Card 2/4 The internal-friction dependence on the temperature was
sov/126-11-2-14/26
Temperature Dependence of Internal Friction and ElaL'stic Constants
of Pure Iron
found to be similar for 99.99910 iron as for other metals;
but the absolute value over the whole temperature range
is several times that for arinco iron and other metals.
The high value for pure iron is due to losses in magneto-
niechanical hysteresis arising in periodic deformation in
the range of very small strains. The application of a
magnetic field reduces the value greatly. The results
showed that not all the carbon in the iron is in the form
of solid solution. From the internal-friction measuring
technique the dependence of the elastic constants on
temperature were obtained (Figure 4)j for the moduli of
normal elasticity and shear the relations are almost
linear in character.
There are 4 figures, 1 table and 8 Soviet references.
Card '7S./4
SOV/126-8-2-14/26
Temperature Dependence of Internal Friction and Elastic Constants
of Pure Iron
ASSOCIATION: Fiziko-tekh-nichoskiy institut AN UkrSSR
(Physico-technical Institute of the Ac.Sc.,, Ukrainian SSR)
SUBMITTED: June 9, 1958
Card 4/4
C@e va 0 67660
SOV/126-8-6-7/24
AUTHORS: Gumenyuk, V.S. and Lebedev, V.V.
T @-l
t
t Hi
h T
ITLE: ures
empera
Electrical Conductivit of Iron a
g
PERIODICAL: Fizika metallov i metallovedeniye, 1959, Vol 8, Nr 6,
pp 847-850 (USSR)
ABSTRACT; The object of this work was to measure the resistivity
of high-purity iron in the range 20 to 1450*C. A
compensating method with a PPTV-l potentiometer and M-21
galvanometer was used, current stabilization being secured
at 1A with the aid of a barretter, The test pieces (Fig 1)
of the type proposed by Kan and Lazarev (Ref 4) were in
the form of 3 to 6 mm diameter and 50 to 100 mm long
cylinders with slivers bent back at either end (for
voltage tappings), The test-pieces were suspended in the
hot zone of a special ceramic-less resistance furnace
(Ref 5). This (Fig 2) had a system of horizontal spiral
heaters supported by tungsten rods enclosed in a system of
molybdenum-sheet cylinders. Its working space was 200 mm
bY 35 mm in diameter, giving a temperature up to
high
.
2500 C at 6 W. Temperature was measured with platinum/
Card 1/2 platinum-rhodium and chromel-alumel thermocouples and a
6 7L"' 6 0
SOV/126-8-6-7/24
Electrical Conductivity of Iron at High Temperatures
type PP instrument. The furnace with the test piece was
placed in a vacuum chamber at lo-5 to lo-6 mm Hg. The
results for distilled iron (Ref 6) are shown in Table 2
and in Fig 3 (curve 5). For comparison Fig 3 also shows
the resistivity vs temperature curves for armco iron
(curve 2), the corresponding curve (3) obtained by
Mokrovskiy and Regell (Ref 3) and by Salldau (Ref 1).
In contrast to the results of Mokrovskiy and Regell
the present investigation showed that the resistivity of
iron in the delta-range rose with temperature and more
rapidly than in the gamma-range. There are 3 figures,
2 tables and 6 references, 5 of which are Soviet and
I German.
ASSOCIATION:Fiziko-tekhnicheskiy institut AN USSR (Physico-Technic4l
Institute.XAS UkrSSR)
SUBMITTED: June 26, 1959
Card 2/2
82632
S/126/6o/olO/02/002/020
Min E073/E335
AUTHOR: Lebedev, V.V.
TITLE: Determination of the Coefficients of Heat Conducti-vit2L
of Metals in the Range of High Temperatures
PERIODICAL: Fizika metallov i metallovedeniye, 196o., vo-i. lo.
No. 2, pp. 187 - 190
TEXT: A method is proposed of determining the coefficient of
heat conductivityl'bf metals and alloys at temperatures above
800-900 OC, which permits taking into consideration relatively
simply the thermal losses of the active part of the specimen
caused by radiation. An equation is derived for determining
the thermal conductivity of a specimen material from the tempera...
ture distrIbution in its centre inside vacuum (Eq. 0)@ p. 189).
By using this method, the coefficient of heat conductivity was
measured for a molybdenum rod in the temperature range
900 - 2200 0C. In a plot, p@ 189, the results obtained (Curve 2)
are compared with those of other authors (Curves 1 and 3 - the
latter based on results of Osborn, Ref 2). The author states
that the strong dependence of the thermal conductivity of Mo on
the temperature obtained by Osborn seems unlikely since
Card 1/2
82632
S/126/60/010/02/002/020
E073/E335
Determination of the Coefficients of Heat-Conductivity of
Metals in the Range of High Temperatures
extrapolation of these results
to room temperature yields excessive values of the coet',L'icient
of thermal conductivity. The measured values of the electric
resistance and of the heat conductivity of Mo for various
temperatures are given in the table, p. 190, which also contains
Wiedmann Franz ratios calculated from these values. In the
temperature range under consideration, the obtained values of
the ratio XJO/T are less than the theoretical ones and show
little dependence on temperature, with a minimum in the tempera-
ture range 14ooib 1600 OC. Acknowledgments are expressed to
V.S. Gumen for his assistance in carrying out the here
described work.
There are 1 figure, 1 table and 8 references, 2 Soviet and
6 English.
ASSOCIATION: Fiziko-tekhnicheskiy institut AN USSR
(Physics-technical Institute of the Ac.Sc,,
Ukrainian SSR)
SUBMITT D: February, 27, 1960
Card 272
yu I -
.050-1 -5
Olt
'CIO
oo
CO
e5 ef@
C
es
4c7s-c e LN 6e
t a, evl
e. C te se,
1 IWO ;,s %,&26 oce
re 9
se. ol e.
ovc@
.9,1:, " oC4 0 r,-
p;VP &Je, . Op. 'ILI,
Ov t
vo V-0 es -
os,: V4 0
16
t,, Jr
ot
.00
S I
IL)'9 Cl 00 0
a, "CLe
oi,
e ooe
9 be ()6/
I' 10
D2 74/D OAS -c1c -COCN5
e- roe,
SO e-C 06 ' Te
Vis - s ov& V"e
tollo O@cg - r-xic-
3.5
0 r_'t tj
J-L116 ot
CT yLa O-C
-C@ Va ravlli:111@1 1-111.1 all"a T@5)
,,,te
aete ctr.@ te-clal ttle i:vl ec, "ae TL
0'r ale 'aa il@ 99 Cewpo
ot ,.3-sts a,
bl
e X,@e ate 0 -re -e ol;,c
e
'oe .,@ Oa3
-V oas 06 V 06 0
e e
ete-C t @o 0 (It . 11 :. 0
0, .0
ef';1
'CLS
9 olls Y 0 er@pe
C@a at
e @,e -re Vqs@ e sip
ote t ,tte a 0
ae (@e
6 -a tye
O'tj OLa at
eq eT
0
teo 1 0 t
t
O,ot
Go, C.&
27966 /010/015
S/I.B5 61/006/004
A3
tltiermal cO-Rducr-ivity (4)
DeterTv C12T + 2 li ) .
- !@jC2J
(5)
02,
or (12T f 0
2 (6)
12
,where S2@c2
S-1 S2
0.)
C-1 C2 0 (T T all
rLs_ f or (7)
colld-Itlo
the (5 2. nter Of
13 s ing- fro'a Sq. T u 1 ar the ce
O-ae Obta-Las AT -- Tm - 2 -Ou lie
the temPer-atilre di-str'bllt'
Tillis 9 by
Card 3/4
2-t966
S/185/61/006/004/010/015
Determining thermal conductivity... D274/D303
the specimens, one can find f 0.) from Eq. (7), and then find
The above method was used (as an applicationj for determining the
thermal conductivity of a molybdenum rod at temperatures of 1000-
140000@ The measured values are given in a table I together with
the values obtained by Osborn by means of Worting s graphic method,
There is good agreement between both results. There is I table and
8 references: 2 Soviet-bloc and 6 non-Soviet-bloc. The 4 most re-
cent references to English-language publications read as follows:
A.G. Worting, D. Halliday, Heat, 1948; S.C. Jain, K.S. Krishnan,
Proc. Roy. Soc,, A 222, N 1149, 167, 1954; S.C. Jain, K@S. Krish-
nan, Proc. Roy. Soc., A 225, N 1160, 1, 1954; K.S. Krishnan, S.C.
Jain, Brit. J. Appl. Phys@, 5, N 12, 426, 1954@
ASSOCJATION@.
SUBMITTED-.
1@
%.lard 4/4
Fizyko-tekhnichnyy instytut AN USSR, Kharkiv (Phys-
icotechnical Institute AS UkrSSR, Khar'kov)
September 19, 1960
jl@g
2 1043" 'Ito, 11 @-q
89939
S/126/61/,,
11/001/002/019
E032/E314
AUTHORS- Gumenyuk, V,S,,.anu,.Iebedev, V.V.
TITLEi Study of the Thermal and Electri@:al Conductivity
of Tungsten and Graphite at High Temperatures
PERIODICAL- Fizika metallov i metallovedeniye, 1961,
Vol. 11, No. 1, pp@ 29 - 33
TEXTo. A description is given of an apparatus for the
determination of the thermal and electrical conductivity
and their ratio for metals and alloys in the temperature
region 900-2 200 0C. Data on the temperature dependence of
the thermal and elecArical canductivxty of tungsten and
graphite are reported as well as the values of the
Wiedemann-Franz ratio in a wide temperature interval,,
Empirical formulae are put forward to represent the thermal
conductivity of tungsten and graphite as a function of
temperature. The thermal conductivity was determined by
the method described in a previous paper (Ref. 5) and is
based on the following considerations. If a short and a
long rod of the same diameter and chemical composition
Card 1/9
89939
S/126/61/011/001/002/019
E032/E314
Study of the Thermal and Electrical Conductivity of Tungsten
and Graphite at High Temperatures
are heated in a vacuum by an electric current to the same
temperature, then the shorter red wLI1 require a hizher
current owing to additional heat losses at the ends. The
thermal conductivity of the material can then be calculated
from the formula
Px 2 (12 _ 12)
X = - 1
2S2/N T
where X is the thermal conductivity,
(9 is the resistivity,
S is the cross-.sectional area of the specimen,
,n T is the temperature drop over a lvngu)x ,
I is the current necessary to heat the short specimen,
II is the current necessary to heat the long specimen.
Card 2/9
89939
S/126/61/011/001/002/019
E032/E314
Study of the Thermal and Electrical Conductivity of Tungsten
and Graphite at High Temperatures
Thus, in order to determine X it is necessary to measure
(I and 1 1 on the long specimen and I and Z_@T on the
short specimen. These quantities were measured with the aid
of a special device. The specimens were placed in water-
cooled holders, one of which was free to move when the
specimen expanded so that no stresses were applied to the
specimen. The distance between the holders could be varied
between 0 -and 150 mm and the potential difference across
defined sections of the specimen were measured by means of
molybdenum or tungsten contacts. The whole system was placed
in the vacuum chamber in a vertical position, the vacuum being
of the order of 10-5 mm Hg. The potential differences were
measured with the AC potentiometer P-0-:3 (R-56), while the
temperature was measured by the optical pyrometer
OnrV,V--