Response of Silicon Nitride Ceramics under High-enthalpy Plasma Flows

Jiasuo Guan, Laifei Cheng, Yaohui Wang

科研成果: 期刊稿件文章同行评审

2 引用 (Scopus)

摘要

Silicon nitride ceramics were prepared by means of a hot-press sintering method. The ablation behavior was studied by plasma wind tunnel tests. The data suggested that, under low heat flux and stagnation pressure conditions, the ablation process was controlled by the atomic oxidation of Si3N4, leading to the elimination of Si3N4. By contrast, the erosion was mainly produced by the decomposition of Si3N4 under high heat flux and stagnation pressure conditions. Under these conditions, a fraction of Si phase, formed upon decomposition of Si3N4, was volatilized. The remained Si had melted due to high temperatures and scoured away from stagnation point area, generating mushroom-shaped samples.

源语言英语
页(从-至)828-835
页数8
期刊Journal Wuhan University of Technology, Materials Science Edition
33
4
DOI
出版状态已出版 - 1 8月 2018

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