C/C复合材料表面SiC及其复合涂层研究

来源 :第二届中国国际复合材料科技大会 (CCCM-2) | 被引量 : 0次 | 上传用户:ciancomjy
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  采用真空等离子体喷涂技术与热处理相结合的方法在C/C复合材料表面制备SiC及其复合涂层,表征了该涂层的显微结构和相组成,研究了加入不同含量的Al2O3和B4C对SiC涂层组成与结构的影响,并采用等离子体火焰和H2-O2火焰对涂层的抗烧蚀性能进行考察。结果 表明,采用喷涂和后处理结合的方法可以在C/C复合材料表面形成SiC涂层,通过改变工艺参数,该涂层具有不同表面层厚度和渗入层厚度的结构特征;添加Al2O3和B4C后,SiC涂层的晶粒尺寸发生变化,其抗烧蚀性能亦有一定程度的改善。烧蚀实验表明,SiC涂层经大于2000℃火焰烧蚀300s后仍保持完整,显示良好的抗烧蚀性能。
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