张宝鹏,于新民,刘俊鹏,刘伟,霍鹏飞.SiC/ZrB2-SiC-B4C涂层的抗氧化和耐烧蚀性能研究[J].稀有金属材料与工程,2020,49(12):4072~4080.[Zhang Baopeng,Yu Xinmin,Liu Junpeng,Liu Wei,Huo Pengfei.Oxidation and ablation resistance of SiC/ZrB2-SiC-B4C coatings for C/SiC composites[J].Rare Metal Materials and Engineering,2020,49(12):4072~4080.]
SiC/ZrB2-SiC-B4C涂层的抗氧化和耐烧蚀性能研究
投稿时间:2019-11-03  修订日期:2019-12-31
中文关键词:  C/SiC复合材料  涂层  浆料刷涂  氧化  烧蚀
基金项目:
中文摘要:
      碳/碳化硅复合材料(C/SiC)在使用时经常受到高温氧化和烧蚀作用。本文采用化学气相沉积(CVD)和浆料刷涂-烧结法制备了双层SiC/ZrB2-SiC-B4C涂层,对比研究了无涂层,单层SiC涂层和双层SiC/ZrB2-SiC-B4C涂层C/SiC复合材料在1500℃下的氧化和在4.2 MW/m2热流密度下的烧蚀性能。结果表明,制备态ZrB2-SiC-B4C涂层致密、完整,表面平均粗糙度约为1 μm,孔隙率约为4.2 %。在1500℃氧化30 h后,SiC/ZrB2-SiC-B4C涂层C/SiC复合材料的质量损失率约为10%,涂层表面氧化膜致密,无明显裂纹。高温烧蚀20 s后,SiC/ZrB2-SiC-B4C涂层的线烧蚀率和质量烧蚀率分别为1.0±0.3 μm/s和1.1±0.2 mg/s,与单层SiC涂层相比分别降低了75.0 %和50.0 %,SiC/ZrB2-SiC-B4C涂层烧蚀后形成的ZrO2-SiO2氧化膜可以减缓火焰对复合材料的机械剥蚀作用。
Oxidation and ablation resistance of SiC/ZrB2-SiC-B4C coatings for C/SiC composites
英文关键词:C/SiC composites  Coating  Slurry painting  Oxidation  Ablation
英文摘要:
      Carbon/silicon-carbide composites (C/SiC) usually suffer from high-temperature oxidation and ablation. In this study, double-layered SiC/ZrB2-SiC-B4C coatings were fabricated by chemical vapor deposition (CVD) and slurry painting-sintering methods. The naked, single-SiC coated and SiC/ZrB2-SiC-B4C double-layered C/SiC composites were oxidized at 1500 °C and ablated under a heat flux of 4.2 MW/m2. The results indicated that the slurry-painted ZrB2-SiC-B4C coating was dense and intact, which had a surface roughness of ~ 1 μm in Ra and the porosity of ~ 4.2 %. After oxidation at 1500 °C for 30 h, the mass loss rate of SiC/ZrB2-SiC-B4C coated C/SiC composite was ~ 10 %. The oxidation scale on the coating surface is compact without obvious cracking. After ablation for 20 s, the linear and mass ablation rates of SiC/ZrB2-SiC-B4C coating were separately 1.0±0.3 μm/s and 1.1±0.2 mg/s, decreased by 75.0 % and 50.0 % relative to the SiC coating. The formed ZrO2-SiO2 scale provided a protection against the mechanical erosion from the flame.
作者单位E-mail
张宝鹏 航天特种材料及工艺技术研究所 bhzbp1129@buaa.edu.cn 
于新民 航天特种材料及工艺技术研究所  
刘俊鹏 航天特种材料及工艺技术研究所  
刘伟 航天特种材料及工艺技术研究所  
霍鹏飞 航天特种材料及工艺技术研究所  
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