CALCULATION OF THE ACTIVATION-ENERGY, THE ATTEMPT FREQUENCY AND THE PEIERLS STRESS IN LOW PURITY POLYCRYSTALLINE ALUMINUM

被引：4

作者：

ALNASER, WE

ZEIN, M

机构：

[1] Department of Physics, University of Bahrain, Isa Town

来源：

SOLID STATE COMMUNICATIONS | 1990年 / 76卷 / 02期

关键词：

D O I：

10.1016/0038-1098(90)90539-N

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The dislocation relaxation peaks (Bordoni B2 and Niblett-Wilks B1) have been studied in 3N purity polycrystalline aluminium at kHz and MHz frequencies. B1 and B2 were found to occur at 98 and 138 K respectively at the kHz frequency while they shifted to 143 and 174 K respectively at the MHz frequency. The activation energy W, the attempt frequency f0 and the Peierls stress τp were found to be 0.065 eV, 1.99 × 1012 Hz and 1.74 × 106 N m-2 for B1 and 0.10 eV, 1.58 × 1013 Hz and 4.11 × 106 N m-2 for B2 respectively. The effect of the purity and deformation on W, frr0 and τp is discussed. © 1990.

引用

页码：187 / 189

页数：3

共 16 条

[1] DAMPING MEASUREMENTS FOR STUDYING THE RELATION BETWEEN TYPE OF DISLOCATIONS INTRODUCED BY PLASTIC-DEFORMATION [J].