Diffusion in icosahedral Al-Pd-Mn quasicrystals: temperature and pressure dependence

被引：12

作者：

Galler, R ^{[1
]}

Mehrer, H ^{[1
]}

机构：

[1] Univ Munster, Inst Met Forsch, D-48149 Munster, Germany

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2000年 / 294卷

关键词：

quasicrystal; diffusion; icosahedral Al-Pd-Mn; radiotracer method; pressure dependence of diffusion;

D O I：

10.1016/S0921-5093(00)01145-X

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The temperature and pressure dependence of diffusion in monocrystalline icosahedral Al-Pd-Mn quasicrystals (i-Al-Pd-Mn) was investigated by radiotracer techniques using serial sectioning for depth profiling. Recent results on the temperature dependence of Zn-65, In-114m and Pd-103 diffusion are presented together with previous ones on Mn-54 and Fe-59 diffusion from our laboratory. The temperature dependence of diffusion is discussed in connection with results on i-Al-Pd-Mn from other groups and compared with the diffusion of foreign elements in Al. This comparison suggests a vacancy mechanism for diffusion in i-Al-Pd-Mn at least at higher temperatures. Magnitude and sign of the activation volumes also support a vacancy mechanism. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：693 / 696

页数：4

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