POSITRON TRAPPING AND SELF-DIFFUSION ACTIVATION-ENERGIES IN CHROMIUM

被引：23

作者：

CAMPBELL, JL

SCHULTE, CW

机构：

[1] Physics Department, University of Guelph, Guelph, N1G 2W1, Ontario

来源：

APPLIED PHYSICS | 1979年 / 19卷 / 02期

关键词：

66.30; F; 78.70;

D O I：

10.1007/BF00932389

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The activation energy for self-diffusion in chromium is found to be 3.51±0.13 eV from positron trapping measurements. The 4.51 eV activation energy seen in tracer diffusion work is therefore ascribed to divacancies, the Q 2/Q 1 ratio being typical of the bcc refractory group. The positron data give 0.55 for the ratio H 1 v M /H 1 v F of vacancy migration and formation energies, in agreement with quenching data for tungsten. © 1979 Springer-Verlag.

引用

页码：149 / 152

页数：4

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