On the electrochemical dealloying of Mg–Cu alloys in a NaCl aqueous solution
On the electrochemical dealloying of Mg–Cu alloys in a NaCl aqueous solution
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DOI：
10.1016/j.corsci.2010.08.005
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发表时间：
2010-12
影响因子：
8.3
通讯作者：
Changchun Zhao;Xiaoguang Wang;Zhen Qi;H. Ji;Zhonghua Zhang
中科院分区：
文献类型：
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作者：
Changchun Zhao;Xiaoguang Wang;Zhen Qi;H. Ji;Zhonghua Zhang
用电化学方法研究了快速凝固Mg-Cu合金在0.2MNaCl水溶液中的脱合金过程。结果表明，Mg-Cu合金在NaCl溶液中通过电化学脱合金可以制备出纳米多孔铜。Mg-Cu合金的电化学活性与合金成分和相组成有关。双相Mg-Cu合金的临界电势由较不贵重的Mg 2Cu相决定，而不是与本构相或元素的含量成正比。Mg 2Cu的脱合金化对MgCu 2相的脱合金化有促进作用。
The dealloying of rapidly solidified Mg–Cu alloys in a 0.2M NaCl aqueous solution has been investigated using electrochemical measurements. The results show that nanoporous copper can be fabricated by electrochemical dealloying of the Mg–Cu alloys in the NaCl solution. The electrochemical activities of the Mg–Cu alloys are related to both alloy composition and phase constitution. The critical potentials of biphasic Mg–Cu alloys are determined by the less noble Mg2Cu phase, rather than being in proportional to the contents of constitutive phases or elements. Furthermore, the dealloying of Mg2Cu has a promoting effect on that of the MgCu2phase.