莫来石
材料科学
涂层
复合材料
热冲击
扫描电子显微镜
增强碳-碳
微观结构
碳纤维
图层(电子)
复合数
陶瓷
作者
Chao Ma,Hejun Li,Haidong Wu,Qiangang Fu,Changchun Sun,Xiaohong Shi,Yulei Zhang,Zhengzhong Zhang,Jun Tao,Zelin Han
标识
DOI:10.1016/j.jmst.2012.11.001
摘要
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%.
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