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| 等离子喷涂制备ZrB2-SiC涂层及其抗氧-丙烷焰流烧蚀性能 |
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王佳文1,2,3, 刘敏2,3, 邓春明2,3, 毛杰2,3, 韩伟1,2,3, 曾德长1
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1.华南理工大学材料科学与工程学院, 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, 广州 510650;3.广东省新材料研究所 广东省现代材料表面工程重点实验室, 广州 510650
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| 摘要: |
| 为提高C/C复合材料的抗高温烧蚀性能，利用大气等离子喷涂技术在C/C复合材料表面制备ZrB2-SiC复合涂层，并对其进行抗高温氧-丙烷焰流烧蚀试验。采用X射线衍射仪（XRD）、扫描电子显微镜（SEM）及能谱分析仪（EDS）对涂层的物相成分、微观形貌等进行检测分析。结果表明：大气等离子喷涂能在C/C复合材料表面制备出均匀致密的ZrB2-SiC复合涂层，涂覆有ZrB2-SiC涂层的C/C复合材料分别承受1 600、1 700和1 800℃的氧-丙烷焰流烧蚀300 s后依次增重0.63%、0.76%和0.71%，而烧蚀600 s后试样质量烧蚀率分别为9.42×10-5、2.04×10-4和1.04×10-3 g/s。ZrB2-SiC涂层显著提高了C/C复合材料的抗烧蚀性能，涂层氧化生成的玻璃态SiO2能有效填充孔隙。直到SiO2耗尽，涂层烧蚀后的孔洞成为环境中的氧进入基体的通道，导致基体烧蚀。 |
| 关键词: C/C复合材料 ZrB2-SiC复合涂层 抗烧蚀 等离子喷涂 |
| DOI：10.11933/j.issn.1007-9289.2016.04.013 |
| 分类号: |
| 基金项目:国家重点基础研究发展计划（973计划）（2012CB625100）；广东省科技项目（2013B050800031，2014B050502008） |
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| Ablation-resistance of ZrB2-SiC Coating Under Oxygen-propane Torch Flame Prepared by Atmospheric Plasma Spraying |
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WANG Jia-wen1,2,3, LIU Min2,3, DENG Chun-ming2,3, MAO Jie2,3, HAN Wei1,2,3, ZENG De-chang1
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1.School of Material Science and Engineering, South China University of Technology, Guangzhou 510640;2.National Engineering Lab for Modern Materials Surface Engineering Technology, Guangdong Institute of New Materials, Guangzhou 510650;3.Guangdong Provincial Key Lab for Modern Materials Surface Engineering Technology, Guangdong Institute of New Materials, Guangzhou 510650
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| Abstract: |
| To improve the ablation resistance of C/C composites, ZrB2-SiC composite coatings were deposited on C/C composites by atmospheric plasma spraying (APS) process. Ablation tests were carried out on the ZrB2-SiC coated C/C composites using Oxygen-propane torch. The microstructures and phases of the coatings were analyzed by XRD, SEM and EDS. The results show that uniform and dense ZrB2-SiC composite coatings can be fabricated on the C/C composites by atmospheric plasma spraying (APS). After ablation at 1 600, 1 700 and 1 800℃ for 300 s, the weight of ZrB2-SiC coated C/C composites increases by 0.63%, 0.76% and 0.71%, respectively. While after ablation at 1 600, 1 700 and 1 800℃ for 600 s, the mass ablative rate of the coated specimen is 9.42×10-5, 2.04×10-4 and 1.04×10-3 g/s, respectively. The ZrB2-SiC composite coatings effectively enhance the ablation-resistance of C/C composites, and the oxidation product SiO2 can fill in the pores in the coatings. However, after the exhaustion of SiO2, the pores in the coating became the channels of the oxygen diffused into the C/C substrate, resulting in the failure of C/C substrate. |
| Key words: C/C composites ZrB2-SiC composite coatings ablation-resistance plasma spraying |