Mullite Oxidation Resistant Coating for SiC-coated Carbon/Carbon Composites by Supersonic Plasma Spraying
Mullite Oxidation Resistant Coating for SiC-coated Carbon/Carbon Composites by Supersonic Plasma Spraying
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DOI：
10.1016/j.jmst.2012.11.001
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发表时间：
2013-02
影响因子：
10.9
通讯作者：
Chaojie Ma;Hejun Li;Heng Wu;Q. Fu;Can Sun;Xiaohong Shi;Yulei Zhang;Zhengzhong Zhang;Jun-Xi Tao;Han Zhihai
中科院分区：
文献类型：
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作者：
Chaojie Ma;Hejun Li;Heng Wu;Q. Fu;Can Sun;Xiaohong Shi;Yulei Zhang;Zhengzhong Zhang;Jun-Xi Tao;Han Zhihai
为提高C/C复合材料的抗氧化性能，采用超音速等离子喷涂技术在SiC涂层C/C复合材料表面制备莫来石涂层。利用X射线衍射仪（XRD）和扫描电镜（SEM）对莫来石涂层的物相和显微结构进行了表征。涂层主要由莫来石（3Al 2 O3 − 2SiO 2）单相组成。扫描电镜结果表明，莫来石涂层连续，与SiC内层结合良好，无贯穿裂纹。莫来石涂层具有良好的抗氧化性能。涂层C/C复合材料在1773 K下氧化98.5 h，在1773 K至室温之间热震9次后，失重率仅为2.57%。
To improve the oxidation resistance of carbon/carbon (C/C) composites, mullite coating was prepared on the surface of SiC-coated C/C composites by supersonic plasma spraying. Phases and microstructures of mullite coating were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The coating primarily consists of a single phase of mullite (3Al2O3−2SiO2). The SEM results show that mullite coating was continuous and well bonded with the SiC inner layer without penetrating crack. Mullite coating exhibited good oxidation resistance. After 98.5 h oxidation at 1773 K and 9 thermal shock cycles between 1773 K and room temperature, the weight loss of the coated C/C composites was only 2.57%.