Diffusion of Mn-54 and Ge-68 in single grain icosahedral Al70Pd21.5Mn8.5 quasicrystals

被引：14

作者：

Sprengel, W

Lograsso, TA

Nakajima, H

机构：

[1] IWATE UNIV,DEPT MAT SCI & TECHNOL,MORIOKA,IWATE 020,JAPAN

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

来源：

DEFECT AND DIFFUSION FORUM | 1997年 / 143卷

关键词：

quasicrystal; icosahedral structure; self-diffusion; impurity diffusion;

D O I：

10.4028/www.scientific.net/DDF.143-147.849

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The diffusivity of Mn-54 and Ge-68 in single grain icosahedral Al70Pd21.5Mn8.5 quasicrystals has been determined by a precision grinding technique. In the range from 870 to 1100 It the temperature dependence of the Mn and Ge diffusivity can be described by Arrhenius equations with an activation energy Q = (181 +/- 5) kJ mol(-1) and a pre-exponential factor D-0 = 3.4.10(-4) m(2)s(-1) for Mn, and Q = (148+/-7) kJ mol(-1) and D-0 = 1.4.10(-4) m(2)s(-1) for Ge, respectively. The experimental results are discussed together with diffusion mechanisms proposed for quasicrystals from theoretical considerations.

引用

页码：849 / 854

页数：6

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