Mn self-diffusion in single grain icosahedral Al70Pd21.5Mn8.5 quasicrystals

被引：33

作者：

Sprengel, W ^{[1
]}

Lograsso, TA ^{[1
]}

Nakajima, H ^{[1
]}

机构：

[1] IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 77卷 / 26期

关键词：

D O I：

10.1103/PhysRevLett.77.5233

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The self-diffusivity of Mn-54 in single grain icosahedral Al70Pd21.5Mn8.5 quasicrystals has been determined by a precision grinding technique. In the range from 870 to 1093 K the temperature dependence of the Mn self-diffusivity D follows the Arrhenius equation with an activation energy Q = (180.8 +/- 4.6) kJ mol(-1) and a pre-exponential factor D-0 = 3.4 x 10(-4) m(2) s(-1). The experimental results are discussed together with diffusion mechanisms proposed for quasicrystals from theoretical considerations.

引用

页码：5233 / 5236

页数：4

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