C/C复合材料大气等离子喷涂mullite/ZrB_2-MoSi_2涂层抗烧蚀性能（英文）  

Ablation Resistance of APS Sprayed Mullite/ZrB_2-MoSi_2 Coating for Carbon/Carbon Composites

作　　者：韩伟[1,2] 刘敏 邓春明 刘学璋 曾德长 周克崧[2] Han Wei;Liu Min;Deng Chunming;Liu Xuezhang;Zeng Dechang;Zhou Kesong(South China University of Technology, Guangzhou 510640, China;Guangdong Provincial Key Lab for Modern Materials Surface Engineering Technology, National Engineering Laboratory for Modem Materials surface Engineering Technology, Guangdong Institute of New Materials, Guangzhou 510650, China)

机构地区：[1]华南理工大学,广东广州510640 [2]广东省新材料研究所现代材料表面工程技术国家工程实验室广东省现代材料表面工程重点实验室,广东广州510650

出　　处：《稀有金属材料与工程》2018年第4期1043-1048,共6页Rare Metal Materials and Engineering

基　　金：Provincial Natural Science Foundation of Guangdong Province(2016A030312015);Guangdong Science and Technology Program(2013B050800031,2014B050502008,2015B070701024)

摘　　要：采用大气等离子喷涂技术(APS)在C/C复合材料表面制备了mullite/ZrB_2-MoSi_2双层抗烧蚀涂层。借助XRD、SEM、EDS等分析手段对涂层的组织结构进行研究;基于氧丙烯焰烧蚀试验考察ZrB_2-MoSi_2/mullite复合涂层对C/C复合材料高温耐烧蚀性能的影响。结果表明,在1700和1800℃的氧丙烯焰下烧蚀60s,ZrB_2-MoSi_2/mullite涂层试样的质量烧蚀率分别为3.49×10^(-3)与3.77×10^(-3)g/s。其与单层ZrB_2-MoSi_2涂层试样相比,ZrB_2-MoSi_2/mullite涂层试样展现了出色的抗烧蚀性能。烧蚀过程中形成的硅酸盐玻璃可以作为热障层而减少氧气的进一步渗透,并且还具有自我封填缺陷的能力,使ZrB_2-MoSi_2/mullite涂层表现较好的抗烧蚀性。Mullite/ZrB2-MoSi2 coating was deposited on carbon/carbon（C/C） composites to protect against ablation by atmospheric plasma spraying（APS）. The microstructure and morphology of the coating were characterized by X-ray diffraction, scanning electron microscopy and energy dispersive spectroscopy. The ablation resistance of the coating was investigated at different temperatures with oxypropylene torch. The results show that the mass ablation rates of the Mullite/ZrB2-MoSi2 coated C/C composites are 3.49×10-3 g/s and 3.77×10-3 g/s after ablation at 1700 and 1800 ℃ for 60 s, respectively, which exhibit good ablation resistance compared with the single-layer ZrB2-MoSi2 coated. The increase of ablation resistance can be attributed to the formation of a silicates glass film, which acts as a thermal barrier and self-seals the defects of the coatings.

关 键 词：C/C复合材料 等离子喷涂 涂层 烧蚀 

分 类 号：TB306[一般工业技术—材料科学与工程] TB332