MoSi2-based oxidation protective coatings for SiC-coated carbon/carbon composites prepared by supersonic plasma spraying
MoSi2-based oxidation protective coatings for SiC-coated carbon/carbon composites prepared by supersonic plasma spraying
复制标题
DOI：
10.1016/j.jeurceramsoc.2010.06.007
复制
发表时间：
2010-11
影响因子：
5.7
通讯作者：
Heng Wu;Hejun Li;Chaojie Ma;Q. Fu;Yongjie Wang;Jian-feng Wei;Jun-Xi Tao
中科院分区：
文献类型：
--
作者：
Heng Wu;Hejun Li;Chaojie Ma;Q. Fu;Yongjie Wang;Jian-feng Wei;Jun-Xi Tao
为防止碳/碳(C/C)复合材料氧化，采用超音速等离子喷涂技术在碳/碳复合材料表面制备了MoSi2基氧化防护涂层。MoSi2基涂层主要由MoSi2、Mo5Si3和玻璃状SiO_2组成。表面只观察到少量针孔和一些微裂纹，没有穿透厚度的裂纹穿透横截面。MoSi2基涂层样品在1773K空气中氧化400h后的失重率仅为1.14%，涂层C/C复合材料在1773K至室温下经过11次热循环后仍保持完好。这种突出的抗氧化能力主要归功于在MoSi2基涂层表面形成了SiO_2基涂层。
To protect carbon/carbon (C/C) composites against oxidation, MoSi2-based oxidation protective coatings for SiC-coated carbon/carbon composites were prepared on them by supersonic plasma spraying. The MoSi2-based coatings primarily consist of MoSi2, Mo5Si3and glassy SiO2. Only a few pinholes and some microcracks are observed on the surface and no through-thickness cracks penetrate the cross-section. Weight loss of the MoSi2-based coated specimens is only 1.14% after 400h oxidation in air at 1773K and the coated C/C composites remain intact after 11 thermal cycles between 1773K and room temperature. The outstanding anti-oxidation ability is mainly attributable to the formation of SiO2-based layer on the surface of MoSi2-based coatings.