DETERMINATION OF ACTIVATION-ENERGY FOR NANOMETER-SCALE GRAIN-BOUNDARY SLIDING IN COPPER

被引:20
作者
MONZEN, R
SUMI, Y
机构
[1] Department of Mechanical Systems Engineering, Kanazawa University, Kanazawa, 920
[2] Mitsubishi Electric Corporation Inazawa Works, Inazawa, 492
来源
PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES | 1994年 / 70卷 / 05期
关键词
D O I
10.1080/01418619408242932
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The activation energy Q for grain-boundary-dependent sliding in copper has been measured below 573 K from experiments using an electron microscope on Cu-Fe-Co alloy bicrystals with various [011] symmetric tilt boundaries. The technique utilizes the sliding-induced rotation of moire fringes in b.c.c. Fe-Co particles on grain boundaries and is capable of detecting sliding of less than 1 nm. It is concluded that grain boundaries slide in a viscous manner with inherent viscosity eta = eta0T exp (Q/RT), where eta0 is a constant related to the boundary structure. The misorientation angle dependences of the values of Q and eta0 display cusps and are similar to that of the boundary energy in copper. The larger the degree of disorder in the atomic arrangement at a boundary, the lower is the boundary viscosity.
引用
收藏
页码:805 / 817
页数:13
相关论文
共 30 条
[1]   BOUNDARY DEFECTS, AND ATOMISTIC ASPECTS OF BOUNDARY SLIDING AND DIFFUSIONAL CREEP [J].
ASHBY, MF .
SURFACE SCIENCE, 1972, 31 (01) :498-&
[2]   GRAIN-BOUNDARY DIFFUSION MECHANISMS IN METALS [J].
BALLUFFI, RW .
METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1982, 13 (12) :2069-2095
[3]  
BISCONDI M, 1968, MEM ETUD SCI REV MET, V65, P167
[4]  
Biscondi M., 1984, PHYSICAL CHEM SOLID, P225
[5]   STRUCTURE OF HIGH-ANGLE GRAIN BOUNDARIES [J].
BRANDON, DG .
ACTA METALLURGICA, 1966, 14 (11) :1479-&
[6]  
CORDEA JN, 1966, T METALL SOC AIME, V236, P1685
[7]   INTERNAL-FRICTION OF COPPER BICRYSTALS WITH [001] TWIST BOUNDARIES [J].
KATO, M ;
MORI, T .
PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1993, 68 (05) :939-949
[8]   SLIDING BEHAVIOR AND DISLOCATION-STRUCTURES IN ALUMINUM GRAIN-BOUNDARIES [J].
KOKAWA, H ;
WATANABE, T ;
KARASHIMA, S .
PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1981, 44 (06) :1239-1254
[9]  
LAGARDE P, 1974, CAN METALL QUART, V13, P245
[10]  
LAGARDE P, 1974, MEM ETUD SCI REV MET, V71, P121