Ablation behavior of CVD-ZrC coating under oxyacetylene torch environment with different heat fluxes

Shao Long Wang, Ke Zhi Li, He Jun Li, Yu Lei Zhang, Wei Yang Zhang

科研成果: 期刊稿件文章同行评审

37 引用 (Scopus)

摘要

An ablation resistance ZrC coating composed of micrometer particles was prepared on carbon/carbon composites by chemical vapor deposition. The structure evolution, ablation property and behavior of the coating were investigated under an oxyacetylene torch environment with different heat fluxes. Results show that the ablation performance decreases with the increase of heat fluxes from 2380 to 4180 kW/m2. Oxidation erosion is proposed as the major ablation mechanism. The ablated coating consists of three layers (outer ZrO 2 layer, transitional ZrCxOy layer and residual ZrC layer). An oxidation progress that the ZrC is oxidized into ZrC xOy firstly and then into ZrO2 is inferred and accelerated by the continuous diffusion of oxygen resulted from the increase of heat fluxes. During different heat flux environments, the coating exhibits efficacious mechanical denudation resistance and the formed transitional ZrCxOy and outer ZrO2 layers act as a good oxygen diffusion barrier, which could be the reason for its high ablation resistance at the temperature of 2000-3000 °C.

源语言英语
页(从-至)108-114
页数7
期刊International Journal of Refractory Metals and Hard Materials
48
DOI
出版状态已出版 - 1月 2015

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