陶瓷
烧蚀
固态
材料科学
过程(计算)
国家(计算机科学)
工艺工程
化学工程
计算机科学
工程物理
复合材料
工程类
航空航天工程
算法
操作系统
作者
Ziming Ye,Yi Zeng,Xiang Xiong,Sen Gao,Chen Shen,Shiyan Chen,Tingting Jiang,Yang Ge
出处
期刊:Advanced powder materials
[Elsevier]
日期:2024-03-01
卷期号:: 100189-100189
标识
DOI:10.1016/j.apmate.2024.100189
摘要
Multiphase design is a promising approach to achieve superior ablation resistance of multicomponent ultra-high temperature ceramic (UHTC), while understanding the ablation mechanism is the foundation. Here, through investigating a three-phase multicomponent ceramic consisting of Hf-rich carbide, Nb-rich carbide, and Zr-rich silicide phases, we report a newly discovered solid-state reaction process among multiphase multicomponent ceramic during ablation. It was found that this solid-state reaction occurred in the matrix/oxide scale interface region. In this process, metal cations are counter-diffused between the multicomponent phases, thereby resulting in their composition evolution, which allows the multicomponent phases to exist stably under a higher oxygen partial pressure, leading to the improvement of thermodynamic stability of three-phase multicomponent ceramic. Additionally, this solid-state reaction process appears synergistic with the preferential oxidation behavior among the oxide scale in enhancing the ablation performance.
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