| C/ C 复合材料SiC/ SiO2 涂层的制备及其抗氧化性能 |
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| 引用本文： | 梁武,李国栋,熊翔.C/ C 复合材料SiC/ SiO2 涂层的制备及其抗氧化性能[J].宇航材料工艺,2011,41(5). |
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| 作者姓名： | 梁武 李国栋 熊翔 |
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| 作者单位： | 中南大学粉末冶金研究院,长沙,410083 |
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| 基金项目： | 国家重点基础研究发展计划资助项目，国家创新群体基金 |
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| 摘 要： | 为提高C/C复合材料的抗氧化性能,采用包埋法和低压化学气相法制备了SiC/SiO2涂层.借助XRD、SEM和EDS等测试手段分析了复合涂层的微观结构,并研究了其在l273、1773 K静态空气中的抗氧化性能.结果表明,包埋法制备的SiC涂层具有一定的浓度梯度.低压化学气相法制备的非晶Si02外涂层则有效地封堵了SiC内涂层的的裂纹和孔洞,并解决了SiC涂层在中温区(1073～1473 K)无法形成完整SiO2膜的问题.在l 273、1 773 K静态空气中经10h氧化后,涂层试样的质量损失率分别仅有4.97和0.36 mg/cm2,表现出良好的抗氧化性能.
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| 关 键 词： | C/C复合材料 包埋法 LPCVD SiC SiO2 抗氧化 |
Preparation and Oxidation Resistance ofSiC/ SiO2 Coating for C/ C Composites |
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| Liang Wu,Li Guodong,Xiong Xiang.Preparation and Oxidation Resistance ofSiC/ SiO2 Coating for C/ C Composites[J].Aerospace Materials & Technology,2011,41(5). |
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| Authors: | Liang Wu Li Guodong Xiong Xiang |
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| Institution: | Liang Wu Li Guodong Xiong Xiang(Powder Metallurgy Research Institute,Central South University,Changsha 410083) |
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| Abstract: | In order to improve the oxidation resistance of the C/C composites,a SiC/SiO2 coating was prepared by pack cementation and low-pressure CVD.The microstructures of the multilayer coating were studied by XRD,SEM and EDS analyses,and then the oxidation resistance of the as-coated C/C composites was evaluated in ambient air at 1 273 K and 1 773 K.The results show that the SiC coating prepared by pack cementation has a compositional gradient.And the external amorphous SiO2 coating prepared by low-pressure CVD ef... |
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| Keywords: | C/C composites Pack cementation LPCVD SiC SiO2 Anti-oxidation |
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