The Soret effect in bulk metallic glasses

被引：6
|
作者：
Liu, Y. [1 ]
Liu, C. T.
George, E. P.
Wang, X. Z.
机构：
[1] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China
[2] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA
[3] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA
来源：
INTERMETALLICS | 2007年 / 15卷 / 04期
关键词：
diffusion; glasses; metallic; thermodynamic and thermochemical properties; rapid solidification processing;
D O I：
10.1016/j.intermet.2006.09.007
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Compositional inhomogeneity induced by the Soret effect was studied in two Zr-based bulk metallic glasses (BMGs): Zr50Cu50 and Zr50Cu40Al10 (at%), and one Cu-based BMG: Cu60Zr30Ti10 (at%), all of which were prepared by rapid solidification. The concentration of Cu increases from the surface to the interior, while the concentrations of Zr, Ti and Al decrease. The magnitude of the Soret effect is found to be highly dependent on the sample size and interactions between the diffusing atoms in bulk metallic glasses. For the Zr50Cu50 alloy, a large sample size favors the Soret effect, because of the longer diffusion time it affords compared to a small sample. Further, the additions of At and Ti in the Zr-Cu BMGs reduce the magnitude of the Sorel effect by the formation of short-range order and/or inter-atomic clusters. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码：557 / 563
页数：7
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