The effect of short-range order on passivation of Fe-Cr alloys
The effect of short-range order on passivation of Fe-Cr alloys
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DOI：
10.1149/2.0871811jes
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发表时间：
2018
影响因子：
3.9
通讯作者：
Minglu Liu;Ashlee Aiello;Yusi Xie;K. Sieradzki
中科院分区：
文献类型：
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作者：
Minglu Liu;Ashlee Aiello;Yusi Xie;K. Sieradzki
虽然众所周知，12-13 at.%虽然二元Fe-Cr合金的类不锈钢钝化行为需要铬，但关于这种行为的组成依赖性仍然存在突出的问题。为了探索这些问题，我们研究了短程有序（SRO）Fe-Cr合金的钝化行为，并将其与随机固溶体的钝化行为进行了比较。我们的研究结果表明，对于含12-18原子%的合金，铬，钝化的SRO合金延迟，我们把这归因于有序的渗滤行为的影响。最后，我们讨论了一些主要的悬而未决的问题，钝化在Fe-Cr系统，并建议基于第一性原理的计算可以作出重要贡献，我们在这个系统中的钝化的理解。
While it is well known that 12–13 at.% chromium is required for stainless-like passivation behavior of binary Fe-Cr alloys, there remain outstanding questions regarding the compositional dependence of this behavior. In order to explore these issues, we examined the passivation behavior of short-range ordered (SRO) Fe-Cr alloys and compared this to that of their random solid solution counterpart. Our results reveal that for alloys containing between 12–18 at.% Cr, passivation in the SRO alloys is delayed and we attribute this to ordering effects on percolation behavior. Finally, we discuss some major outstanding questions regarding passivation in the Fe-Cr system and suggest that first-principles based calculations could make important contributions to our understanding of passivation in this system.