Al 和 Zr 合金对高温氧环境中 Cr 氧化行为的影响

IF 5.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2024-11-28 DOI:10.1016/j.jallcom.2024.177768

Ke Zhang, Jun Xie, Jinhua Liu, Bing Yao, Chaowen Zhu, Haibing Guo, Xiaosong Zhou, Wenzeng Bing, Xiaochun Han

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引用次数: 0

摘要

采用粉末冶金法制备了一系列具有不同 Cr/Al 比率的 CrAl 和 CrAlZr 合金块。合金在 800℃ 下氧化 30 小时。结果表明，CrAl 合金表面形成了致密的氧化层，显示出良好的抗氧化性。然而，Zr 的引入成为氧气的快速扩散通道，底层合金被严重氧化。实验证明，ZrO2 的形成破坏了紧密的 Cr2O3 和 Al2O3 氧化层的完整性，这是导致 CrAl 合金失效的主要因素。

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Effect of Al and Zr alloying on the oxidation behaviors of Cr in high temperature oxygen environment

A series of CrAl and CrAlZr alloy blocks with different Cr/Al ratios were prepared by powder metallurgy method. The alloys were oxidized at 800℃ for 30 hours. Results showed that a compact oxide layer was formed on the surface of CrAl alloy, showing good oxidation resistance. However, the introduction of Zr act as a fast diffusion path for oxygen, where the underlying alloy was oxidized seriously. The experiment has demonstrated that the formation of ZrO₂ undermines the completeness of the compact Cr₂O₃ and Al₂O₃ oxide layer, which is the dominate factor for the failure of the CrAl alloy.

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.