Corrosion and tribocorrosion behavior of equiatomic refractory medium entropy TiZr(Hf, Ta, Nb) alloys in chloride solutions
Corrosion and tribocorrosion behavior of equiatomic refractory medium entropy TiZr(Hf, Ta, Nb) alloys in chloride solutions
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DOI：
10.1016/j.corsci.2022.110166
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发表时间：
2022-02
影响因子：
8.3
通讯作者：
Zening Wang;Yujia Yan;Yuan-zhao Wu;Xin Huang;Yi Zhang;Yanjing Su;L. Qiao
中科院分区：
文献类型：
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作者：
Zening Wang;Yujia Yan;Yuan-zhao Wu;Xin Huang;Yi Zhang;Yanjing Su;L. Qiao
为了获得比纯钛更高的耐蚀性能，开发了等原子TiZr(Hf，Ta，Nb)中熵合金(MEAs)。Nb和Ta合金化可以减少钝化膜中的点缺陷，从而显著提高Ti-50Zr(at%)合金的耐蚀性能。TiZr(Hf，Ta，Nb)合金钝化膜中元素的氧化层厚度显著增加，其次是Hf>；Hf&Gt；Tb&Gt；Nb&Gt；Ta，这是由元素形成氧化物的能力决定的。严重的犁削和剥层磨损导致TiZrNb合金具有较高的摩擦腐蚀速率。讨论了三种金属间化合物的磨损机理。
Equiatomic TiZr(Hf, Ta, Nb) medium entropy alloys (MEAs) were developed to achieve higher corrosion resistance than pure Ti. Nb and Ta alloying can greatly improve the corrosion resistance of Ti-50Zr (at%) alloys by reducing point defects in passive films. The oxide thickness for elements in passive films on TiZr(Hf, Ta, Nb) alloys increase significantly, following Hf > Zr > Ti > Nb > Ta, which was determined by the ability of elements to form oxides. Serious ploughing and delamination wear result in a higher tribocorrosion rate for TiZrNb alloy. The wear mechanisms for the three MEAs was discussed.