Microstructure and phase evolution during the dealloying of bi-phase Al-Ag alloy
Microstructure and phase evolution during the dealloying of bi-phase Al-Ag alloy
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DOI：
10.1016/j.corsci.2012.11.027
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发表时间：
2013-03-01
影响因子：
8.3
通讯作者：
Zhai, Q. J.
中科院分区：
文献类型：
--
作者：
Song, T. T.;Gao, Y. L.;Zhai, Q. J.
研究了Al-35 Ag双相合金在分型极限范围内的化学脱合金过程。α-Al（Ag）和Ag_2Al的脱合金化同时开始，全部α-Al（Ag）和部分Ag_2Al脱合金化，剩余的Ag_2Al随后脱合金化。残余Ag_2Al的脱合金与空位控制机制和Al原子的扩散有关。结果表明，在脱合金过程中，Al和Ag原子的扩散是显著的。Ag骨架在初始阶段形成，并随着时间的推移逐渐粗化，且d与t（2/5）成正比，说明Ag原子的扩散起着重要作用。(C)2012爱思唯尔有限公司保留所有权利。
The chemical dealloying of bi-phase Al-35Ag alloy has been investigated within the parting limit. The dealloying of alpha-Al(Ag) and Ag2Al commenced simultaneously, and all alpha-Al(Ag) and part of Ag2Al were dealloyed, leaving residual Ag2Al to be dealloyed afterwards. The dealloying of the residual Ag2Al is associated with vacancy controlled mechanism and diffusion of Al atoms. It is revealed that the diffusions of the Al and Ag atoms during dealloying are significant. The Ag skeletons formed at the initial stage, and became coarsened gradually with a time dependence of d proportional to t(2/5), illustrating the vital role of diffusion of Ag atoms. (C) 2012 Elsevier Ltd. All rights reserved.