FLUCTUATION THEORY OF NORMAL CRYSTAL-GROWTH FOR METALLIC ONE-COMPONENT SYSTEMS - 2 CASES OF MODELING THE MELT GROWTH INTERFACE MOTION

被引：16

作者：

BAIKOV, YA ^{[1
]}

ZELENEV, YV ^{[1
]}

HAUBENREISSER, W ^{[1
]}

机构：

[1] ACAD SCI GDR,ZENT INST FESTKORPERPHYS & WERKSTOFFORSCH,INST MAGNET WERKSTOFFE,DDR-108 BERLIN,GER DEM REP

来源：

PHYSICA STATUS SOLIDI A-APPLIED RESEARCH | 1979年 / 55卷 / 01期

关键词：

D O I：

10.1002/pssa.2210550113

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A fluctuation theory of normal crystal growth for metallic one‐component systems with diffuse melt—crystal interface is developed which is based on the following assumptions: a) the diffuse melt—crystal interface is characterized by a two‐phase transitional (TPT) region consisting of several sandwiched monoatomic layers which thermodynamics is described in the frame of the Bragg‐Williams approximation and b) the motion of the TPT region as well as its kinetics are determined by the stochastics of thermally driven local atomic‐scale fluctuations of solid species within the layers of the TPT region. Growth rates and kinetic coefficients for two cases of melt growth interface motion are computed and discussed in dependence on the stochastic processes in question as well as on the undercooling of the advancing interface or other parameters of the TPT region. A main result of the fluctuation theory of normal growth is the evidence of the existence of a linear growth kinetics at small interface undercoolings. The linear growth kinetics is due to the stochastics of motion of solid species in the TPT region. This normal growth mode is basically different from the classical normal growth mechanism and its variants. Copyright © 1979 WILEY‐VCH Verlag GmbH & Co. KGaA

引用

页码：123 / 135

页数：13

共 28 条

[1] RATE EQUATIONS FOR DISLOCATION-FREE AND DISLOCATION-ASSISTED GROWTH OF GALLIUM [J].