SIZE EFFECTS OF DISLOCATION STABILITY IN NANOCRYSTALS

被引:85
作者
GRYAZNOV, VG
POLONSKY, IA
ROMANOV, AE
TRUSOV, LI
机构
[1] AF IOFFE PHYSICOTECH INST,LENINGRAD 194021,USSR
[2] STATE ATOM ENERGY COMM,IND RES ASSOC KRASNAYA ZVEZDA,MOSCOW 115230,USSR
来源
PHYSICAL REVIEW B | 1991年 / 44卷 / 01期
关键词
D O I
10.1103/PhysRevB.44.42
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In this paper the size effect of lattice-dislocation stability in nanocrystals (NC's) caused by a strong interaction of dislocations with interfaces is analyzed. When the nanocrystallite size l becomes less than the characteristic length LAMBDA, a substantial dislocation redistribution in the nanocrystal may occur. This length is estimated to be dozens of nanometers and depends on the character of interfaces: coherent or incoherent (slipping), on a difference of elastic moduli of NC phases, etc. Simple analytical estimations of LAMBDA on the basis of exact calculations have been obtained.
引用
收藏
页码:42 / 46
页数:5
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