Coarsening of Al3Sc particles in an Al-Mg-Sc alloy

被引：0
|
作者：
Watanabe, Chihiro [1 ]
Watanabe, Daizen [1 ]
Monzen, Rvoichi [1 ]
Tasaki, Kazue [1 ]
机构：
[1] Kanazawa Univ, Grad Sch Nat Sci, Kanazawa, Ishikawa 9208667, Japan
来源：
Solid-Solid Phase Transformations in Inorganic Materials 2005, Vol 1 | 2005年
关键词：
Al-Mg-Sc alloy; Al3Sc particle; interface energy; diffusion coefficient;
D O I：
暂无
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The Ostwald ripening of Al3Sc particles in an Al-1 mass% Mg-0.27 mass% Sc alloy aged at 673, 698 and 723 K has been investigated. The size of the particles was determined by transmission electron microscopy and the Se concentration in the Al matrix by electric resistivity measurements. The transition from growth to coarsening is found. The coarsening rate is identical to that of Al3Sc particles in an Al-0.28 mass% Sc alloy. The matrix/Al3Sc interface energy gamma and volume diffusion coefficient D of Sc in Al have been calculated independently using the Lifshitz-Slyozov-Wagner theory. The estimates of gamma and D are in agreement with those derived by the same method from data on coarsening of Al3Sc particles in the binary alloy. Whether the particles are coherent or semi-coherent with the matrix, the value of gamma is nearly 230.
引用
收藏
页码：803 / 808
页数：6
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