SCIENTIFIC ABSTRACT AMOSOV, V.M. - AMPELOGOVA, N.I.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R000101310009-6
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: November 2, 2016
• Document Release Date: March 20, 2001
• Sequence Number: 9
• Publication Date: December 31, 1967
• Content Type: SCIENCEAB

S/136/61/000/006/003/003
Preparation of Plastic E021/E435
SinterIng regimes for tantalum Table.
Rise in Temperature Time for temperature rise
Temperature
Moulding Moulding Mo~id:Fng Moulding
Interval m
Oc 5x 5x 120mm 20x2Ox6OOmm 5x5xl2O 20x2ox6oomm
m,
up to 1750 per 100 per 100 1 min 4 min
1750- 2000 per 75 per 20 1 min 4min
2000 hold for 15min hold for
60 min
2000- 26oo per 80 per 25 1 min 4min
26oo hold for hold for
4 hours 4 hours
Card 7

Preparation of Plastic ...
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Card 5/7
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Preparation of Plastic
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S/080/b'/054,. .:00!100910:20
A057/A!29
AUTHORSs Amosovt V.M., Lanis, V.A*
TITLE: Mass-Spectrometric Investigation of Gas-Evolution Processes During
Sintering of Tantalum and NiobiuL
PERIODICALt Zhurnal Prikladnoy Xhimil, !961, Vol. '14, No. I., pp. 84-89
TEXT: In the present work detailed investigations into gas-evolution during
vacuum refining of tantalum and niobium were made. Many physical and mechan
ical properties of these metals are depending on the completeness of gas re-
moval (hydrogen, oxygen, nitrogen) during vacuum refining. Literature data
concerning this problem deal generally with inventigations of the solid phase,
only few qualithtive statements are eiven on com ositions of gases evolved
during vacuum-sintering of tantalum and niobium tW.OtDriscoll, G. Miller,
Ref.10s J.Inst.Hotals, 850,379-384 (1957), M. Mamula, J. Vacek, Ref.14j Hut-
nickfi listy, 11,11,654-66o (1956)]. Thus in the present work more precise
studies were made. The experiments were carried out in a laboratory vacuum
apparatus providing direct heating of tantalum and njobium-pcwder compacts
Card 1/7

2 2,; -28
S/080 116,1034/ '00'100911020 ~Y
A057/A'29
Mass-Spectrometric Investigation of Gas-Evolution Processes During Sintering
of Tantalum and Fiobium
by electrical current, and containing an arrangement for sampling the gas
evolved. The apparatus was evacuated to 10- torr by a APH-10 (DRN~10)
mercury pump. The temperature increase during the experiment was 30 C per
min for tantalum and 15 0C per min for niobium. Cor,~entration of the compo-
nents in the evolved gas mixture was determined by i MC-21M(MS-2M) mass-
spectrometer containing a molecular filling system. Sensitivity was 0.01%
and accuracy for 1% of gas component ti%, while below 1% the accuracy de-
creased and could be t30%. The used samples were 5 z 5 x 120 mm moldings. The
tantalum powder containeds 97 Ta, 0.6% Nb, 0.4% C, 0.23% Si, 0.16% Ti and
approximately 0-9% 02, 0.2% Fe 0.07% N1. The obtained results, given in
"temperature 0versus gas evolution" curves (Fig-3) show three maxima at 800-
8500C, 1,900 C and 2,5500C. Up toapproximately 1,8000C the gases consist of
hydrogen and carbon dioxide, while evolution of hydrogen ceased almost entire-
ly at 1,7000C. At 1,9000C the maximum total hydrogen evolution is the result
of the reaction between carbides and lower oxides cf tantalum and the evolv-
ing gases consist almost entirely of carbon dioxide. Above 1,800-2,00000 a
Card 2/7

slofjo1611034,100110091020
A057/A!29
Mass-Spectrometric Investigation of Gas-Evolution Prooesses During Sintering
of Tantalum and Niobium
noticeable evolution of nitrogen from dissociation cf tantalum nitri0e occurq
which reaches its maximum at 2,400-2,4500C. A second peak of hydrogen evolu-
tion occurs at 2,100-2,300 0C (apparently in connection with dissociation of
the tantalum hydride dissolved in tantalum). The experiments investigating
niobium were carried out with samples containingt 91.el. Nb, 2.5~6 Ta, 1.1~6 C,
0.6% Fe, 0.3% Ni, 0-17% Ti and approximately 3..8% 0,. X-ray data indicate
that Nb20c, Nb02, and NbO are present. The curve f;r niobium (Fig.4) shows
a pattern'similar to the tantalum curve, but the temperature maxima of re-
duction are lower (650-7000C and 1,760.1,7800C), maximum of the thermal de-
composition of niobium nitride is at 2,2500C, the total amount of evolved
gases is larger, the gas evolution is completed in a shorter time and at a
lower temperature than in the case of tantalum. In ccnne~~tion with thia the
change in evolved gas quantity during niobWm sinlering at. 2,3000C was in-
veatigated (Fig-5). According to the obtained results nioblum sinteringg aatt
2,300 0 should last at least 4 hra in vacuum, while tantalum compacts re-
quire a higher sintering temperature. The authors draw the conclusion that
Card 3/7

2~
b~~B
1 6 '034/0- /009 /020
AO-97/A'-;'9
Mass-Spectrometric Investigation of Gas-Evolution Procesves During Sintering
of Tantalum and Niobium
no evolution of oxygen (as a result of dissociation of the oxides) was ob-
served from the investigated metals. This corresponds to reslilto of M. Ingh-
ram, and W. Chupka [Ref.221 J.Chem.Phys., 27,2,569-579 (1957)] ard S.A. Shchu-
karev, G.A. Semenov, K.Ye. Frantseva [Ref.2-3: ZhNKh, !V,11,26-118 (1959)).
There are 5 figures and 23 referencess 11 Soviet-bloc and 12 non-Soviez-bloc.
The references to the English-language publications read as follow--t
C. Tottle, J.Inst.Metals, 6596,375-378 (1957), C. Ang, 0. 71'ert, J,!.~Ietals, 5,
8,1032-1036 (1953), E. Engle, Trans.Am,lrist.llizi.ldet.En~,-., 71,691 (1925), G.
Miller, 11aterials and Methods, 45,5,131-135 (1957).
ASSOCIATIONt Moskovskiy elektrolampovyy zavod (Moscow Lit,7ht-r-,ulb Plant)
SUBMITTED: May 12, 1960
Card 4/7

A240SOV. V.M.
Obtaining plantic tantalum from electrolytic powdere.
TSvet. met. 34 no.6:65-'72 -Te 161. (MIRA 14:6)
Io Moskovskiy elektrolampovyy zavod,
(Tantalum-Blectrometallurgy)

331164
S/136/62/000/002/00i/oo4
E021/E135
AUTHORj -Amosov, V.~_J.
TITLEi Study of the process of sintering of electrolytic
niobium powder
PERIODICAL: Tsvetnyye metally, no.2, 1962, 6o-65
TEXTs Results are given of study of the processes occurring
in the vacuum sintering of metallic noibium powders with higher
impurity levels than normal. Table I gives the composition (in I,"')
and the particle size distribution (in u). The powder was pressed
at 4.3 t/cM2 into specimens 5 x 5 x 120 mm and sintered in a
laboratory furnace. The temperature was Increased at the rate of
15 OC/min and the furnace was maintained at a given temperature for
ten minutes; during the sintering operation impurities are also
removed at the same time. A sharp fall in electrical resistance
was observed at the beginning of sintering up to a temperature of
1600 Oc indicating the removal of adsorbed gases. The loss in
weight in this interval is insignificant. UP to 1400-1450 OC there
is practically no change in density. However, increasing the
temperature from 1000 to 1430 OC results in a change from open to
Card l/

331614
Study of the process of sintering_ S/136/62/000/002/001/oo4
E021/E135
with a definite ratio of t-arbon, silicon and titanium wit.1-
oxygen. The final sintering temperature must be 2300 OC -v
obtain fill refining. After 4 - 5 hours at 2300 OC, the pr,)rPus.?~
of sintering and refining are complete.
There are 6 tables and 8 referencest 4 Soviet-.bloc and 4 tion
Soviet-bloc, The English language references read as follows:
Ref.11 W. O'Driscoll, G. ~Iiller.J.Inst. of Metals, v,85, 8,
379 (1957).
Ref~2: L. Williams, J. Inst. of Metals, 8~ 185 (1957),
Ref.5,' W. Klopp, C. Sims, R. Jaffe.
Technology of Columbium (Niobium) 1958, io6.
Card 3/ ~

KONSTANTINOV., V.I.; AMOSOV., V.M.
Production of alsotrolytic tantalums niobi=p and their anoya.
rSvet.met. 35 no.8:72-76 Ag 162. (14IRA 15:8)
(Tantaluza-Blectrometallurgy)
(Niobiwa-Blectrometallurgy)

AMOSCV~ Y.M.
11roduction of plastic niobium from electrolytic powders. Izv. vys.
Ucheb. zav.; tevet. met. 5 no.4:122-131 162& (MIRA 16:5)
L Moskovskiy institut tonkoy khimicheskoy tekhnologii, kafedra
Ithimii i tekhnologii redkikh i rasseyannykh elementov.
(Niobium-Blectrometallurgy)

W(q)jF.WT(m)/BDR A
ACCEMION DR: JIUODD3CO~ S/ Q" 631150100110105103-08
AVE=:. _ PI u, sh(&ev,, V. Ye.; Amosov, V. X.; Varfolewyev, M. B.
T3=Z: 2he gyni;hesio and several properties of lower crystallohydrates of yttrlum,
lanthammi and litutbanoid perkbenates
SOUNZ: AN SSRR. Doklady, v. 150,, no. 1, 1963, 105-108
TOPM TAGS: yt~rivm,, lanthaamp leathanoid perrhen&te, lower crystallohydrate
ABSIRAM: The existence of anbydrous perrbenates has not been previously estab-
lished. We article reports a mathcA of preparation of.anhydrous perrhenates of.
the rare earth blemuts by dehydration of tbeir lower crystallohydrates. The
obtained perrhenaten of yttrium, lanthaw- and lantbanoids an soluble in wator In
considerable propoll;ione and tbas the described synthesis can utilize the'starting
materials more effectively with a product yield of 9.5~. The synthesized perrban-
ates contain a minbolyn amount of vater of crystallization. The rare earth per-
rhenates obtaired at 75-W are non-bygroscopic, fine crystals which readilly dis-
solve in Vater, alcohol and wetone, and are stable betwean Via t-&-werature inter-
val of 2DO-55MI. Orls. art. has: 1 figure and 1 table.
iWOCIATION: lloskoyakiy Institut tonkoy khImIcheekoy tekhnologii im. M. V.
Caid
.-: .....................

ACCESSION ?1Rt'-'AP4029533'------
8/0149/64/000/002/0114/0122
A11THORs Amoso'v, V. M.
TITHE: On the tharmochemLetry of tantalum and niobLum oxyhalides
SOURCE: IVUC. Tevetnaya metallur&Lyap no. 2# 1964, 114-122
TOPIC TAGS: themochemistry, tantalum, niobium, oxyhalide, heat of formation,
entropy P
ABSTRACT; There is an insignificant amount of literature on the heats of formation
and the entropies of simple oxyhalides of tantalum and nLobium. The author estimated
the heats of formation for various pentavalent halide and oxyhalide compounds. The!
results were plotted inlgraphs. These values lead to the values of heat formation
for some tantalum, nLobLum, and vanadium cocyhalides. The entropy value was also
calculated for certain oxyhalides.. The author drew the conclusion that the estimate
of the basic thermochemical characteristics of pentavalent and uiobium oxyhalides
have the probable values of s Auggs (ke&l/mole) And 8,,, (entropy unit) ~ 347 and
-72
.z .7 for TaOF3; 282 and 23.2 for TaO2F; 232 and 26.1 for TaOCl 3; 250 and 23.4 for
TaO2Cl; 340 and 24.5 for NbOF3 266 and 20.7 for MY; 220 and 2S.3 for KbO01 3*9
Card i/2
L

-ACCESSXON NR: AP4029533'
235 and 21.2 f(w NbO2Cl, reppectively. The estimated values of the heat of forma-
tion of tantalto and nidtfum o3tybromides and oxyiodides are: 204 for T&OBr 173
3;
:for T&O,Y 191 for NbOBr 3; and 159 for NbO13 (kcallmole) respectively. Orig. art.
bass 4 tables and 7 figures.
ASSOCTATION: Moskovskly institut tonkoy khimicheskoy takhnolo$ii (Moscow Xnatitute
of Thin ChwAcal Technology)
17Aug62 DATE ACQt 3OApr64 ENCL: 00'
!SUB CWH: IML NO REP SOV: Oll 008
2/2

,ACCESSION N11: AP4042022
S/0020/64/157/001/0131/0134
.AUTHORS: Plyushchav, V. Ye.; AMOSOV, V. M.
TITLE: High temperature synthesis and some properties of neutral
,tungstates of yttrium, lanthanum, and lanthanoids
!SOURCE: AN SSSR. Doklady*, v. 157, no. 1, 1964, 131-134
~TOPIC TAGS; yttrium, lanthanum, lanthanum compound, tungstate,
.synthesis property
ABSTRACT: The kinetics and condition for formation of neutral
tungstates of some rare earth elements synthesized at high tenvera-
tures, for which neither the high-temperature synthesis nor the pro-
.perties have been hitherto described in the literature. The initial
~composition and the procedure are briefly described. Most of the
:,investigations were aimed at establishing the optimum conditions
~for the synthesis of these ccopounds. The properties of the result-
"Card

.ACCESSION NIL: AP4042022
ant substances are tabulated. Two types of structures, with dif-
ferent x-ray patterns, have been found, with transition from one
Tstructure to the other being characterized by a change in some pro-
.perties of t1tese compounds. A chemical phase analysis has shown
,that the nex:.t:ral tungstate of rare earth elements do not decompose
.;Up to the melting point., Orig. art. has: 1 figure and 1 table.
.ASSOCIATION: Moskovskiy Institut tonkoy khimicheskoy tekhnologii
:im. M. V. Lomonosova (Moscow Institute.of Fine Chemical Technology)
,SUBMITTED: l7Feb64 ENCL: 03
SUB CODE: GC NR REF SOV: 001 OTHERt 014
Card

ENCLOSURES 01
ACCEMICN VRj AP4042022
X-ray patt:erns of rare-earbv.
tungstaten (ionizaticn
rethod)
a - fion IA to Ho
P
Card 3/S

lam
X-ray patterns of rare earth
tungstates
b - fran Ev to Lu and Y
Card 4/5 C.

ACCESSION NR: AN.042022 ENCLOSURE: 03
Compositi(xi and sow properties of neutral tungstates of yttrium,
lanthanum, and the lanthanoias
5 6
1 - compamd
2 - mlar ratio
3 - main subst,'
% content
4
- density g/an
5 - melt. temp.
6 color
7 white
8 greenish-ye:.low
3 lettuce colm,
10 - pale lilac
11 - pale yellm
12 - pale pink,
al M-st colorless
13 - pale greenj,
almost colmless
14 - nink
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L 61071-65 EFF(n)-2/W(.k)/wp(z)/F,,7(-)/-,MP(b)/T/&-.TAf d)/EI-IP(e)/W(W)/W(t)
jjD/ % Vniro % 'I ?
ACCESSIOWN6 A 6018269 UR/0226/65/000/007/0019/0024
b
AUTHOR: Amosov, V. M.; Bobkova, N. N..~ Dianov, V. V
TTTLE- rhe ellependen6e of the teelmological propertieWof tantalum and niobium on the
physicochomicrd characteristics of the initial powders
SOURC& Poi-oshkovaya metallillya, no. 7, 1965, 19-24
OPIC TAGS: pomder metallur i tantalum poWer, niobium powder, tantalurn pouder
size, tantittlurn po or ty, n7lbblum porMer purity, nioblum powder size, metal
powder-pressing-
ABSTRAIM A study is made of the purity and last'c f Ta and Nb as a fidictioa of
I
P~
the grain size and chemical coraposit-16fic t"Ie. initiai powders. The authors utilized
as ra-w m.,.terials the electrolytic powders of varYing grain size and purity which were
prelimini.rily fluxed following a previously piiblisheJ pt-oue(lurv (V M. Amosov,
Tsvetny)e metally, no. 6, 65, 1961; Izv- VUZov, "Tswmava metailurpya, - no. 4,
Int
122, 1,96 k). The results cover 1) the degree oi pretssing dtWing uumpaciting of &J-
mol dingr. is a function of the avorV particle size of the starting ponder, 2) the tensile
strength cl sintered moldings as a function of the particle size; 3) the degree of pressing
t:Card 1/2

ACd=~fi -.-~~-"AP5018 - - - ------- ------------
duringCDMpacting and the tensile strength as a function of the purity of the Initial
powders; and 41 the elongation of sintered Nb moldirgs as a funetton of the purity of
the initi;d pomiers. Orig. art. Ims: 5 figulms and 1 table.
ASSOM,rim. Moskovskly elektrolampovyy zavod (Moscow Electric Bulb Factory)
SUBMITTED: l5Jun64
NO REF SOVt 005
ENCL: 00 SUB CODE: MM
OTHER% 001

L 1848-66 EPA(s)-2/'-L.14T(m)/EPF(n"1-2/9,TP(t)/,W(z)/g-IP(b) ME(c) JD11W#VtW1JG
ACCESS16N tilt: AP5013071 UR/0149/65/000/001/0110/012 A
AUTHORt Mlosov, Ve No
TITLE: Mechanism of the processes of electrowinning of tantalum from oxyfluoride
melts
SOURCE: IIIUZ. Tsvetnaya metallurgiya, no. 1, 1965, 110-120
1-1
TOPIC TAGSi tantalum, elecir-olytic depos n, thermodynamic calculation, tanta-
lum compouild Yv/ 5
oodynamic analysis of the ~em X - Ta - 0 - F
ABSTRACT: On the basis of a therv sy~
a
-Cl, the a-ithor discusses the problem of compositiork~of. melts ased on K2Tar7, KF,
KCI, and U205, which are used In the electrowinningl"Of tantalum metal powders.
It is showm that the dissolution of tantalum pentoxide in the electrolyte malt
should occap as a result of its chemical reaction with complex tantalum fluorides
of the composition K3TaCi r (K3T,3re or K3TaClF-7) and potassium fluoride. De-
pending upva the compositfoR of the initial electrolyte, the products of the chemi,-
cal reactivo may be Ta205o2K2TaF7 and complex oxyfluoridea of the composition
KjaO YFa (a. S., K3TaOF6 and K2TaD2r3). According to thermochemical. calculations,
Card 1/2

L 1848-65
ACCESSION FIR: AP5013071
in the presence of sufficient amounts of potassium fluoride' the compound
Ta205*2K2TiX7 should decompose to form oxyfluorides of the composition K TaO F
Equations cm derived for the temperature dependence of the decompositioff pow-
tials of a series of reactions involving simple and complex halogen and oxyhalogen
compounds of tantalum. Possible echemes of the overall processes occuring during
the elect tvwrinn ing of tantalum frcm oxyfluoride melts are proposed. Orig. art.
has: 1 figure, 2 tables.
ASSOCIATI01h; Kafedra, khimiL i te):hnologii r-edkikh i rasseyannykh elementov, Nos-
kovskiy inutitut tonkoy khimicheskoy tekhnologii (Department of Chemistry and
Technology of Rare and Trace Elemonts, Moscow Institute of Fine Chemical Techno-
logy)" -- VC/ 5-s-
SUBMITTED% 04DecG2 ENCL: 00 SUB Cam: MN
No Rtr SOVI 016 OTHER., 012
CWd 21ili

L 3.556-M EWT(m)/EWP(t)/EWP(b) IJP(o) JD1JG
ACCESSION MR: A?5022268 UR/0363/65/001/007/1155'/1161..
546.65'786
AUTHOR: PlyuhCheVt V. Yo.; Amo.lovs V. M.
TITIE: Srathesis and properties of neutral tungstates of lanthanum) cerium,
prasoodymLium, and neodymium
SOURCE: M SSSR, Izvestiya. Neorganicheakiye materialy, v. 1, no. 7, 1965,
1155-1161
TOPIC TAGS:: lanthanum compound, cerium compound, neodymium compound, praseo-
dymium cotipound, tungstate
ABSTRACT: The conditions of formation of tungstates of La, Cc, Pr, and Nd vers
studied irt the course of their high-temperature synthesis. The extent of re-
action bet%een powders of the oxide M203 and W03 (1:3) was followed by determini
the amount of unreacted W03 by quantitative chemical phase analysis. The reacti
was also studied by differential thermal ana x-ray phase analysis. A close
investigation of the kinetics of formation of H203-3WO3, studied on the mixtures
La 0 4 NO and Nd2O +3W0 in order to determine the optimum conditions for
2tges,zIn3
yn g t1lese c 3pou wis, confirmed the results of the thermographic and
001 n
base analyses. The rate of the reaccion between H203 and "03 is thought
;a r;r-"-Y
X Y2

L -1556-66
i ACCESSION NR: AP5022268
I -
I to be determined by the diffusion of the initial oxides through the layer of the
i reaction prDduct; additional grinding of the sinter accelerates the reaction
rate, and at 900C the reactions proceed practically to completion in a relatively
short time (12 hr). The tungstateis formed are anisotropic, nonhydroscopic,
finely crystalline, and insoluble in water, alcohol, or acetone. They are
attacked by acids and alkalis. All four tungstates are isostructural and have
a monoclinia. lattice; their lattico constants and densities are tabulated. Orig'.
art. has: 3 figures and 3 tables.
i ASSOCIATION: Moskovskly inatitut tonkoy khimicheskoy tekhnologii im. M. V.
Lomonosova Ittoscow Institute of Fitts Chemical Technology)
SUMUTTED: 23Feb65 ENCI: 00 SUB CODE: IC SS
NO REF SOV: 006 (YMEkt 026
Card 2/2 C~
T"
T M11 I a W!T!F1 -1--

AMCGOV, AF.M.; TRUNOV, V.K.; KCVBA, L.M.
'L-ray diffraction StUdy of SoMe lanthanide tungstates. Vest.
mosk. un. Ser. 2:Kh1n. 20 no.4-.23-25 Jl-Ag 165. (MIRA 18:10)
J.. Kafedra neorganicheskoy khimii Moskovskogo gosudarstvennogo
itniversiteta. i Moskovskly elektrolampovyv zavod.

L A2~163a)6 BIP( e )/E6T fm)/_f /E.VP,4.) IFTVE~I:PC~L
I- ACC NR, AP6)22892 SOURCE Q60?8/66/011~'004/0732/0737
AUTHOR: Plyushchav, V. Yo.; Amosov, V. M.
ORG: none IVI
TITLE: Synthesis and properties of ne-atral yttrium tLx~state
SOURCE: Zhurnal neorganichoskoy khinii, v. il, no. 4. 066, 732-737
TOPIC TAGS: tungstate, yttrium, compound
A,BSZMCT: Yttriwn tungoate, Y203-3WC3, was synthesized by sintering the powdered ox-
idesIlt 6oo-jooooc. The extent or the reaction (amount of reacted WO~) wi_s_~h-ecked_Fy_
chemical quantitative phase analysis. The reaction between Ya0l and W03 was also
studied by differential-thermal (Kurnakov pyrometer) and x-ray chase analyses, The
rate of this reaction was found to b0 det"nod by the diffusion of tho initial ox-.
ides through the layer of the reaction p ucts. The reaction begins only after the;
te#erature of polymorphic transformation= WO~ is reached at 7500C, and practically
reiches como'~.otion at 900*C. Yttriii.F7Eu-ngstate is an anisotropic, finely crystallinp,
colorless subistance insoluble in water, alcohol,, and acetone. Its density is 4.407 tt
0. 05 9/eml, and its malting point, 1470 * 200C. It does not decompose at least up td
the melting point, and does not show any transformations. The interplanar distances
nd x-ray liijo intensities of yttri= tungstate are given. The action of acids and

L 42883-66
alkalis on this compound was determined. Orig. art. hasl 3 figures and 2 tables.
SUB CODE: 07/ SUBM DATE; 3OJan65/ ORIG W1 003/ OTH REF: 008
Card 212

ACC i~R, AP6029322 SOURCE CODE: UR'6363/66/002/00811460ii
1 0
,AUTHOR: Plyushcliev, V. Ye.; Amosov, V. M.
ORG: Moscow Institute of Precision Chemical Technology-im. M. V. Lomonosov Ile
(Moskovskiy instL-rut tonkoy khimicheskoy tekhnologii)
1111 -1,1 10 -VI
TITLE: Synthesis and properties of the tungstates of erbium, thulium, ytterbium, and
Ilutetium A-1 -
ISOURCE: AN SSSR. Izvestiya. Neorganicheskiye materialy, v. 2, no. 8, 1966, 1460-1466
TOPIC TAGS: lutetium, thulium, ytterbium, erbium, tungstate, phase composition, solid
mechanical property fV1
ABSTRACT: Kinetics of the interaction of W, Er, Tm, Yb, and Lu oxides was studied in
5000-10501C range. The structure of the tungstates of the general formula M90-4-3WO-a
(where M is Er,, Tm, Yb, or Lu) was determined by x ray technique and melting pointsi
densities, and degrees of decomposition in various acidic and basic media (1 and 10
normal) were determined. The object of the work was to fill the gap in the pertinent
literature. The various tungstate samples were prepared by grinding mixtures Of M203
with W03 in 1:3 molar ratio followed by 15-480 minute fusion in 5000-10001C range. Th,
tbermograms shoioed thermal effects at 5400 and 7780C for Er2O3+3WO3, 5280 and 6400C fo~
Tm203+3WO3, 5360 and 6550C for Yb203tV03, and 5080 and 6550C for Lu203t3WO3. ror Er,
Card 1/2 UDC: 546.651786

ACC NR, AP602SO22
Tm, Yb, and Lu tungstates, the respective melting temperatures (00 and densities
(g/cM3) were found to be: 15000 and 5.18, 15200 and 5.23, 15400 and 5.32, and 15800
and 5.34. At rcom temperature all tungstates were found to be stable when treated wit]
diluted acids or. bases but at 800-1200C their decomposition was almost complete in 2
brs. Orig. art. has; 4 figures and 2 tables.
SUB CODE: 07/ SUBM DATE: 29Jun65/ ORIG REF: 003/- OTH REr: ov
jkA--I
Card 2/2

I ACC NRi AT700-'41b SOURCE CODE: U9100001661 -0
0001 001008310085
.JAUTHOR: Osipov, V, G6;..Drobyaheva, Ye, K.; Ushakov, Ye. V.; Amosov, V. M.; Zelentsova'
IN. M.; Borisov, A. G.
ORG; none
!TITLE: lteth&s of tensile and torsion tests of thin rods at elevated temperatures
!SOURCE: AN SSSR. Institut metallurgii. Napryazhennoye sostoyaniye i plastichnost,
ipri deformiTo%%nii metallov (Stress condition and plasticity during metal deformation)
jMosc4m.r. Izd-vci Nauka,.1966, 83-85
iTOPIC TAGS: it Retal testing machine, tensile test, torsion test, torsion
I
stress, temperature test/ R-5. a=6ptnMvee. metal testing machine
ABSTRACT: Tects oE this kind require a vacuum or a protective atmosphere, which in-
volves considerable techbical difficulties. 11owever, in cases where complete preven-
:tion of oxidation of the specimen is not required an airtight working chamber does
not have to be constructed. Furthermore, the need to use scarce high-temperature
materials for the clamps cati be obviated if during the tests only the middle portion
of the specimon is boated and the deformation I# measured over a segment for which the
temper-kture gradient is within permissible limits. On the basis of these considera-
tions the following method of high-temperature tensile tests was developed: aulargon-
atmosphere eloctrical resistance furnace (Fig. 1)'is attached between the clamps of
Card 1/3

FWdCR R-sA'-T- 7--41C
Card -2/33
argod
IS
an R-5 all-purpose testing machine. Mounted in the central part
of the specimen at a distance of 40 am from each other are two
bushings serving to identify the working length 6f the specimen
and facilitate measurements of the degree of deformation. A
specimen nea uring 3 or 6 = in diameter and 250 mm in length
ertedin the furnace so that its both ends protrude 50
Is ins
mm, each from the furnace. Tensile tests of such specimens at
u to 1300*C demonstrated that, despite the absence of an air-
P
tight chamber, there is virtually no oxidation. However. the
formation of a neck, which complicates the evaluation of test
results, Is a major shortcoming of tensile tests. From this
standpoint, torsion is superior to stretching, since it assures
a more uniform lengthwise distribution of deformations in the
specimen, which is particularly important to the telts of metals
in a state of low plasticity. Accordingly, the following method
Fig. 1. Schezatic Of tensile test:
specimen; 2 - furnace; 3 - clamp; 4 - bushing; 5 - the=o-
couple; 6 - washer

_&OZ jNif4 AT70D441G
of high-temperature torsion testa was developed; specimen 1 is placed In furnace 2
(Fig. 2) and its ends are held tight in clamps 3. Mdunted in the central portion of
the specimen, at a distance of 40
7 mm from each other, are two bush-
04,7
ings 4 clamping the ends of two
high-temperature steel plates 5
whose opposite ends protruding for
20 mm outside the furnace display
arrows 6. The angle of twist over
the 40 mm length is determined ac-
cording to the difference in the
angles"of rotation of the arrows
and reckoned from fixed disks 7.
Fig* 2. Schematic of torsion test These methods in principle admit
the possibility of performing ten-
Isile and torsioni testa at temperatures as high as desired, since the clamps are out-
side the furnace. The material of bushings 4 and plates 5 may be selected according
to test temperature. Orig. art. has-. 4 figures.
SUB CODE: 13, iW, ll/ SUBM DATE: 27Sep66/ ORIG REFt 003/ OTH IM: 001
3/3

ACC NRs AT7004421
SOURCE CODE: UR/0000/661000/000/0122/0130
AUTHOR: Osipcvg Vo Go; Drobysheva, Ye, Ko; Amosovq V.'M,; Ushakov, Ye. V,; Zelantavva~
No M.;' Borisoiv, A. Go I
ORG: none
TITLE: Investigation of the plasticity of VA tungsten during the initial stages of
its thermomechanical treatment
SOURCE: AN SSSR. Institut metallurgii. Napryazhennoye sostoyaniye i plastichnost'
pri deformirovanii metallov (Stress condition and plasticity during metal deforma-
tion). Moscow, Izd-vo Nauka, 1966, 122-130
TOPIC TAGS:
ten (~Tasticit~yhgt forging, filament wound construction/
I/ VA tungsten powder
ABSTRACT: The processing of VA tungsten-powder rods involves the occurrence of small
transverse surface cracks which may lead to the formation of defects duping the draw-
ing and spiralization of these rods into electriz-bulb filaments. To uncover and eli-
~minate the causes of this phenomenon tungsten bars measuring 10.5xlO.5 mm in cross-
!sectional area. as well as rods with diameters of 3, 5.6 and 10 mm, rotary-forged by
different regizies (at 1300, 1450 and 16000C) with different degrees of reduction of
iarea (7.0 to -'16..0%), were subjected to various mechanical tests. The effect of ther-
1/2

ACC NRt AT7004421
momechanical pressworking on the plasticity of tungsten is best revealed by test me-
thods for which the shear stresses are equal or close to normal stresses (i.e. the
torsion test). Flattening tests of rods of 10 mm diameter (performed on a crank
press) showed that the rods forged at 1300*C with considerable reduction of area dis-
play the greatest plasticity over a broad range of temperatures, while bending tests
showed that rods forged at 1600*C with normal reduction of area also display satisfa-
ctory plasticity.. Torsion tests of rods with diameters of 5.6 and 3 mm revealed a
decrease in plasticity with increase in test temperature and iq reduction of area. The
test findings indicate that there exists no direct relationshio between the number of
surface cracks on the rods and thc plasticity and strength properties of the metal.
The plasticity of this metal is largely determined by its stressed state and hence the
plasticity tests must insofar as possible simuYAte a stressed state corresponding to
a given forging regime. Orig. art. has: 10 flg. and 5 tables.
SUB CODE: 13, ll/ ISUBM DATE:. 27Sep66/ OVIG REF: 004
2/2
Card

J~L
L 5898h-65 EW t (I)IEW (m)/DY (n)-2/1W -1 (m) /EPA (w) -2/T Pz-6 IJP(c) MAT
'ACCESSIM NK: j915019013 UR/0286/65/000/012/0038/0038
621.385.032.213.1
AUTHOR: Amosm, V. H.
TITLE': A direcily-heated thermionic ce~~hodej Class 21. Ito. 171926
~
'SOURCE: Byulleicn' izobreteniy i t3varnykh znakov, no. 12, Ic)61,, ~8
TOPIC TAGS: thurnionic emission, theTvionic cathQje, filament cathode
,ABSTRACT: This Puthorls Certificate! irtroduces a dire ctly -heated thermionic cathode
based on refracicry metal and rare ea-Mh oxides. ne ductility of the filament is
improved an,J tht level i-4nd stability of emission are increased by mal