Abstract：SiC coating and SiC-TaC composite coating were prepared on the surface of C/C composites by embedding reaction process using Si and Ta2O5 powders as raw materials. The effects of TaC on the microstructure and high temperature ablation resistance of SiC coating were studied by X-ray diffraction, scanning electron microscopy and high temperature plasma flame (about 2 300 ℃) ablation experiments. The results show that addition of TaC can effectively improve the ablation resistance of SiC coating. After ablation under plasma flame for 30 s, the mass and linear ablation rates of SiC coating are (0.189 2±0.080 0) mg/s and (1.386 7±0.120 0) μm/s, respectively. With addition of TaC phase, the mass and linear ablation rates of SiC-TaC coating are (0.062 7± 0.050 0) mg/s and (0.893 9±0.070 0) μm/s, respectively, the mass and linear ablation rates of SiC-TaC coating are decreased by 66.86% and 35.54%, respectively. The improvement of high-temperature ablation resistance of SiC-TaC composite coating is mainly related to the enhancement of high-temperature stability of the coating and the self-healing cooperation of molten Ta2O5 phase during ablation.
罗骁, 陈晔松, 康盼, 方家, 杨鑫, 黄启忠. TaC对SiC涂层高温耐烧蚀性能的影响[J]. 粉末冶金材料科学与工程, 2023, 28(2): 120-128.
LUO Xiao, CHEN Yesong, KANG Pan, FANG Jia, YANG Xin, HUANG Qizhong. Effect of TaC on high temperature ablative resistance of SiC coatings. Materials Science and Engineering of Powder Metallurgy, 2023, 28(2): 120-128.
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2023, Vol. 28 
