SCIENTIFIC ABSTRACT LYUBOV, B.YA. - LYUBOVICH, Y.O.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R001031220005-7
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: November 2, 2016
• Document Release Date: August 31, 2001
• Sequence Number: 5
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

S/058/62/ooo/oo5/o68/119
AC61/AIOII
AMORS: Lyubov, B. Ya., Roytburd, A. L., Temkin, D. Ye.
Tl=: Mathematical analysis of the crystallization process in plain-
shaped bodies
PF-UODICAL: @ieferativnyy zhurnal, Flzika, no. 5, 19062. 10, abstract 5E81
(V sb. "Rost kristallov. T. 3", Moscow, AN SSSR, 1961, 68 - 74. If
Discuss., 214 - 218) .49.
TE/T: Problems of crystallization (temperature field and the motion of the
-ront of t-e solidified phase) have been solved for plain-shaped bodies, such as
P-atQs, cylinders, and spheres. The calculations are based on the assuimption that
t'.-e thermoi@hysical characteristics of the material are temperature-independent,
and that there is neither supercooling nor overheating of the liquid phase.
rAbstracter's note: Complete translation]
L
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E032/E514
AUTHORS: Lyubov, B.Ya. and Aleksandrov, L.N.
TITLE@ First Symposium on the Growing of CrystaIR of Various
Metals
PERIODICALg Kristallografiya, ig6i, vol.6, No-1, PP-150--151
TEXT@@ The Scientific Committee of the Academv of Sciences
USSR concerned with the formation of crystals is currently organiz-
@ng a series of sections dealing with the more important aspects of
the problem, So far, the following sections have been set upt
growth of crystals of metals, semiconductors,and piezo and ferro-
electrics. A further section is concerned with the theory of the
growing of crystals. It is intended to promote regular symposia on
these topics. The present note reports a summary of the proceed-
ings of the first symposium organized by the above committee, The
symposium took place on October 24-26, 1960 at the Institut
Kristallografii AN SSSR (Institute of Crvstallo raphy, AS, USSR)
Moscow, Fifty representatives of the institutes of the AS,USS@,
scientific research establishments and institutes of higher
education in Moscow, Leningrad, Kiyev, Sverdlovsk, Kharlkov and
others took part. Eleven pz@pers and a number of other communications
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were read. The symposium was opened by N. N. Sheftal'(deputy
chairman of the above scientific committc4 and by the chairman of
the se,-tion concerned with the growing of crystals of metals,
B. Ya. Lyubov. The following papers were among those read:
@@';@@61@ician A. V. Shubnikov spoke on investigations of the crystall-
ization process of ammonium chloride in a drop. V. T. Borisov and
A@ 1, Dukhin (Institut metallovedeniya i fiziki metallov TsNIIChM,
In5titute of Metal Science and Physics of Metals of the Central
Scientific Research Institute of Ferrous Metallurgy) reported on
studies of the kinetics of the growth of crystals of cadmium.
Ye. 0. Esin and A. A. Kralina reported on the growth and the sub-
structure of tin which was investigated at the Institut fiziki metallov
AN SSSR (Institute of Physics of Metals, AS,USSR) at Sverdlovsk.
L. Ys. Oysiyenko, Ye,. 1. Sosnina..and 1. 1, Zasimchuk, Institut
metallofiziki AN UkrSSR (Institute of Metals Physics, AS, UkrSSR)
disp-ussed the conditions under which aluminium crystals are grown
and the effect of these conditions on the degree of perfection of
these crystals. They also considered effects such as diffusion and
creep in these crystals, A. I. Bykhovskiy, L,, N, Larikov and
D. Ye. i-,vsiyenko discussed the connection between the rate of
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crystallization during the a-(--p transformation of paradichloro-
benezene and the super-cooling on the separation boundary between
the phases. Further discussion of this work was given by
A. A. Chernov (Institute of Crystallography,AS, USSR). V. G. Borisov
spoke on the simultaneous solution of the thermal conductivity and
diffusion problems in the case of the crystallization of a binary
alloy in the absence of diffusion super-cooling. V. A.Timofeyeva,
L. D. Prokhorov, A. I. Malyshe and N. A. Anisimov (Institute of
Crystallograohyo AS,USSR) reported on single crystals of copper,
aluminium and nickel having a weight greater than 10 kg which they
had grown in a special high temperature furnace, The apparatus can
be used to grow pure single crystals of any metals with melting
points below 16000C. L@ M. Soyfer and V. I. Startsev (IREA,
Khar1kov) discussed the zone methods of purificdtion and growing
of high-purity single crystals of antimony and bismuth.
N. A. Brilliantov and L. S. Starostina (Institute of Crystallography)
reported on a similar method used to grow molybdenum crystals.
V, F. Miuskov (Institute of Crystallography, AS, USSR) read a paper
on the growing of single crystals of molybdenum in vacuum, using
high heating rates, Direct heating of the speci-men by an electric
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current was used. L. N. Alekswadr%L (Saransk) reported on the
kinetic parameters o-f.-'~-or-mat~i(;n--o--f-single crystals of tungsten.
A film on the growing of crystals was shown by Academician
A. V..Shubnikov and V. F, Parvov. The next symposium is planned
tor 19bl,
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S/126/61/011/002/002/025
E021/E435
AUTHORS: Krasko, G.L. and L
.Yubov, D.Ya.
Lau,-,
TITLE: Towards a Theory of the Behaviour of Concentration
Inhomogeneities in Regular Solid Solutions
PERIODICAL:Fizilca metallov i metallovedeniye, 1961, Vol.11, No.2,
pp.186-193
TEXT: Diffusion in the binary single-phased solid solutions
during chemical interaction of the atoms is examined neglecting
the influence of concentration stresses. The starting point is
the theory of regular solutions where it is assumed that the
solution is completely disordered in terms of long-range order.
The effective coefficient is given as_
11 2zv 1
D = D kT c(l - c) (6)
where z is the number of nearest neighbours in the alloy lattice,
v is the displacement energy, given by the energies of interaction
of the different atomic vapours, and c is the concentration of
the components. Where interaction between the atoms in a system
takes place, the normal equation for a diffusion current
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E021/E435
ac a
Do
is altered considerably and becomes
a + a1nj)_Lc]'
-ac . D, -1
at ox R Oinc dx
where y is the coefficient of activity
solution. In order to obtain a complete
concentration inhomogeneities in a solid
must be solved with definite initial and
An approximate solution is given
(3)
of the component in the
idea of the behaviour
solution, this equation
limiting conditions.
of
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V (0, V,(O, C) + CV, A .0 + CIV, (0,
_L [I + - - X) + 0.7801
V A 't) C 't M C. @1.83 (2@1
(2-c - 1)
202 - (12a)
2PI +
'Cel (2,, - I)' (3-c- 2)-4 (2,c - 1) j2)
0,29(2A'-X),nj(3-,-2)" +(3,)"]-
+ -.1,
0,5p arCtg + arc tg Ot - 3)
(3,,- 2)' (3--2)4
This is checked by experiments on the iron-chroniium system where
a single-phase solid solution exists over a wide range of
temperature and concent-ration. Fig.1 shows the function
DI = 2zv(c) c(l - c)
RT
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as a continuous line- In order to use this in the solution, it
inust be approximated to a quadratic equation in c The dotted
line shows-this approximation
1 2) 103
= (- 0.67 -58c
D 7.9c - 6 T
Fig.2 shows the expression (12a) for three temperatures: 380,
450 and 550%, and -for 20 at.% Cr (x - axes: top axis in seconds,
middle in hours and bottom in days). At 4500C the initial
inhomogeneity begins to increase and is then stabilized. At
5500C the concentration in the centre of the inhomogeneity quickly
increases, reaches a maximum value and then quickly decreases.
If inhomogeneities arise at 3800C there will be practically no
increase. Thus, the conditions for increase in concentration
inhomogeneities exist only in a narrow temperature range. At
higher temperatures diffusion processes are too intensive and at
low temperatures the diffusion processes are too slow. The
results of the calculation agree qualitatively with experimental
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data.. There are 2 figures and 9 references: 6 Soviet and
3 English.
ASSOCIATION: Institut metallovedeniya i fiziki metallov TsNIIChM
(Institute for Science of Metals and Physics of Metals
TsNIIChM)
SUBMITTED: May 26, ig6o (Initially)
September 12, 1960 (after revision)
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e =vjo*c
Sr
so c t J460 OC
10, 1,9,f 6.10
O.Jvacl /,Svoc j". 14(var- 23vac. /WVCC. movdemovac,
-l'-* CI/M. -12. /a Rcym.6"22@wn
Plic, 2.
0
Fig.2.
Fig.l.
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2705
S,'053/(; 1/ 07 -;b 1/ j03
B12@J/B108
AUTHORS: Aleksandrov, L. N., and Lyubov, B. Ya.
TITLE: Theoretical analysis of tiie kinetics of decam@oaition oil
supersaturated solid solutions
PERIODICAL: Uspekhi fizicheskikh nauk, v. 7@., no. 1, lq@'Dl, 117 - 150
TEXT: The present theoretical survey is based on experimental investigaticns
by G. V. Kurdyumov (Problemy metallovedeniya i fiz. metallov, M.,
Metallurgizdat, Sb. za 1949, 1951, 1952, 195-15, 1958 99.), S. S. Shteynberg
(14etallovedeniye-, t. I*, M., Metallurgizdat, 1912), S. T. Konobeyevskiy,
and their teams. In one-component systems (e. g., in metals with poly-
morphism), regions with the structure of a new modification appear after
cooling below the stability range of the high-temperature phase. These
regions increase in size for thermodynamical reasons, and finally take
possession of the whole volume of the system. Per unit time and unit
volume, I - (a/v '(RT/h) exp (-u/kT) exp (-w,ikT) (5), "germs" are trans-
formed into centers. w = k1/'3)oS cr' Scr @ 4ng2r9 9cr Herp,
C
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Theoretical analysis of the kinetics ... B125/B108
the regions smaller and larger than some critical dimensions are called
11germs" and "centers", respectively. cT is the surface tension at t-e
Phase boundary, AF 0 - the variation of the free energy corresponding to the
production of one unit volume of new phase, q_ - the radius of the
critical germ, h - Planck's constant, v 0 - tne S@eciffic '10'ume, "I - ti.e
activation energy of the transition of atoms through tne boundary between
the two phases. u, (1