SiC/SiC复合材料在高温空气中的氧化行为
Oxidation behavior of SiC/SiC composites in air at high temperature
查看参考文献22篇
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文摘
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连续碳化硅纤维增强碳化硅复合材料(SiC/SiC)是先进航空发动机热端部件的重要候选材料。在高温燃气环境中,SiC/SiC会发生氧化腐蚀,导致材料性能迅速恶化。为了揭示国产SiC/SiC复合材料在高温燃气环境中的氧化腐蚀行为,本工作测试了SiC/SiC复合材料的1100~1300℃空气氧化性能,获得了材料的氧化动力学曲线,利用SEM,XPS和XRD分析了材料的形貌、成分和物相演变规律,以阐明其氧化行为。结果表明:SiC/SiC复合材料在1100~1300℃的氧化动力学均遵循抛物线规律;其氧化物为SiO_2。SiC/SiC在1100℃时仅发生轻微氧化,温度高于1200℃时复合材料的氧化程度随温度升高而加剧。在BN界面相和基体孔隙附近的氧化现象更为明显。SiC/SiC复合材料的弯曲强度随氧化程度增加而降低。 |
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其他语种文摘
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As one of important candidates for advanced aerocraft engine hot components,SiC/SiC composites would undergo oxidative and corrosive damage when subjected to high temperature combustion environment.Oxidation behavior of SiC/SiC composites at 1100-1300 ℃ in air was investigated in the present work,to clarify the oxidative and corrosive behavior of the composites. The oxidation kinetics curves were obtained.The morphology and composition evolution of the oxidized materials were analyzed by SEM,XPS and XRD.The results show that the oxidation kinetics of SiC/SiC composites at 1100-1300℃follow the parabolic law and the oxides on the surface mainly consist of silica.Slight oxidation occurs at 1100 ℃.The oxidation rate increases with increasing temperature.The oxidation process is mainly concentrated in the BN interface phase and the pores of the matrix.The bending strength of the composite decreases with the oxidation extent. |
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来源
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材料工程
,2021,49(5):144-150 【核心库】
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DOI
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10.11868/j.issn.1001-4381.2020.001169
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关键词
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SiC/SiC复合材料
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氧化行为
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氧化机理
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损伤
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地址
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1.
中国航发商用航空发动机有限责任公司, 上海, 200241
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西安航空制动科技有限公司, 陕西, 兴平, 713106
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西北工业大学, 超高温复合材料国家级重点实验室, 西安, 710072
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1001-4381 |
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学科
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一般工业技术 |
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基金
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上海市科委科研计划项目
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国防基础科研基金
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国家重点研发计划
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文献收藏号
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CSCD:6973173
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