Oxidation behavior of non-stoichiometric (Zr,Hf,Ti)Cx carbide solid solution powders in air

Huilin Lun, Yi Zeng*, Xiang Xiong, Ziming Ye, Zhongwei Zhang*, Xingchao Li, Haikun Chen, Yufeng Liu

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

59 引用 (Scopus)

摘要

Multi-component solid solutions with non-stoichiometric compositions are characteristics of ultra-high temperature carbides as promising materials for hypersonic vehicles. However, for group IV transition-metal carbides, the oxidation behavior of multi-component non-stoichiometric (Zr,Hf,Ti)Cx carbide solid solution has not been clarified yet. The present work fabricated four kinds of (Zr,Hf,Ti)Cx carbide solid solution powders by free-pressureless spark plasma sintering to investigate the oxidation behavior of (Zr,Hf,Ti)Cx in air. The effects of metallic atom composition on oxidation resistance were examined. The results indicate that the oxidation kinetics of (Zr,Hf,Ti)Cx are composition dependent. A high Hf content in (Zr,Hf,Ti)Cx was beneficial to form an amorphous Zr-Hf-Ti-C-O oxycarbide layer as an oxygen barrier to enhance the initial oxidation resistance. Meanwhile, an equiatomic ratio of metallic atoms reduced the growth rate of (Zr,Hf,Ti)O2 oxide, increasing its phase stability at high temperatures, which improved the oxidation activation energy of (Zr, Hf, Ti)Cx.

源语言英语
页(从-至)741-757
页数17
期刊Journal of Advanced Ceramics
10
4
DOI
出版状态已出版 - 8月 2021

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Lun, H., Zeng, Y., Xiong, X., Ye, Z., Zhang, Z., Li, X., Chen, H., & Liu, Y. (2021). Oxidation behavior of non-stoichiometric (Zr,Hf,Ti)Cx carbide solid solution powders in air. Journal of Advanced Ceramics, 10(4), 741-757. https://doi.org/10.1007/s40145-021-0469-y