Selective dissolution sensitive to minor alloying in CuZr-based metallic glasses
Selective dissolution sensitive to minor alloying in CuZr-based metallic glasses
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DOI：
10.1016/j.corsci.2013.07.021
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发表时间：
2013-11
影响因子：
8.3
通讯作者：
Zi Ming Wang;X. Chang;W. Hou;J. Wang
中科院分区：
文献类型：
--
作者：
Zi Ming Wang;X. Chang;W. Hou;J. Wang
微量Ni的添加对CuZr基非晶合金的选择性溶解行为有很大影响。无镍合金的表面腐蚀层由多孔的富铜膜转变为含镍合金表面的富锆覆盖的钝化膜，从而导致临界电位升高。结果表明，微量Ni合金化抑制了Zr原子的优先溶解，而Cu原子溶解。提出了一种局部键控机制来理解选择性溶解的可切换行为。它为我们提供了对合金内在耐腐蚀性的新见解。
The selective dissolution behaviour of CuZr-based metallic glasses can be strongly influenced by minor Ni additions. The surface corrosion layers of the Ni-free alloy are changed from a porous Cu-enriched film to a Zr-enriched covered passive film on the Ni-containing alloys, thus, resulting in the elevation of critical potentials. The results indicate that the preferential dissolution of Zr atoms is inhibited by minor Ni alloying, while Cu atoms dissolve. A local bonding controlled mechanism is proposed to understand the switchable behaviour of selective dissolution. It presents us with new insights into the intrinsic corrosion resistance of alloys.