期刊
CORROSION SCIENCE
卷 175, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2020.108895
关键词
Carbon/carbon composites; Rare earth; Ablation; Computational fluid dynamics; Sharp leading edge
资金
- National Natural Science Foundation of China [51821091, 51872233]
- Natural Science Basic Research Plan in Shaanxi Province of China [2020JQ-175]
- Fundamental Reasearch Funds for the Central Universities [31020019TS0409]
LaB6-ZrB2 and La2O3-ZrB2 coating were prepared on the sharp leading edge shaped C/C composites by supersonic atmosphere plasma spraying and their oxyacetylene ablation behavior were investigated. Results indicated that the oxide scale generated after ablation of LaB6-ZrB2 coating presented porous due to the excess B content, which decreased the compactness. For La2O3-ZrB2 coating, La2O3 dissolved into ZrO2 by diffusion, forming a dense oxide scale containing La0.1Zr0.9O1.95, which offered the best ablation protection. Moreover, the analysis of La2O3-ZrB2 coating in combination with computational fluid dynamics simulation revealed the ablation behavior of different areas.
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