| 稳定化预热处理对C/SiCN蠕变行为的影响 |
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| 引用本文： | 夏熠,乔生儒,王强强,张程煜.稳定化预热处理对C/SiCN蠕变行为的影响[J].材料导报,2010,24(2). |
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| 作者姓名： | 夏熠 乔生儒 王强强 张程煜 |
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| 作者单位： | 西北工业大学超高温结构复合材料实验室,西安,710072;西北工业大学超高温结构复合材料实验室,西安,710072;西北工业大学超高温结构复合材料实验室,西安,710072;西北工业大学超高温结构复合材料实验室,西安,710072 |
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| 基金项目： | 国家自然科学基金，高等学校学科创新引智计划 |
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| 摘 要： | 研究了碳纤维增强SiCN陶瓷基复合材料(C/SiCN)在真空中的拉伸蠕变行为,通过对比预热处理和未热处理的两类C/SiCN的蠕变激活能,分析了预热处理的稳定化效果,并采用X射线衍射研究了C/SiCN的蠕变相变行为。结果表明,预热处理促进了非晶SiCN基体的结晶,能明显提升C/SiCN的蠕变激活能(Q),未热处理C/SiCN的Q=51kJ/mol,而热处理后试样的Q=72kJ/mol。恒定蠕变应力能明显促进非晶SiCN基体的结晶。
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| 关 键 词： | 非晶SiCN陶瓷 蠕变 蠕变激活能 晶化 |
Effect of Pre-stabilization of C/SiCN on Its Tensile Creep Behavior |
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| XIA Yi,QIAO Shengru,WANG Qiangqiang,ZHANG Chengyu.Effect of Pre-stabilization of C/SiCN on Its Tensile Creep Behavior[J].Materials Review,2010,24(2). |
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| Authors: | XIA Yi QIAO Shengru WANG Qiangqiang ZHANG Chengyu |
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| Abstract: | The tensile creep of carbon fiber reinforced SiCN ceramics matrix composite (C/SiCN) under vacuum is studied.The creep activation energy of the as-received and pre-stabilized C/SiCN is computed and compared,respectively,and the effect of pre-stabilization is analyzed.The phase transition of C/SiCN during creep is examined by X-ray diffraction.The results indicate that pre-annealing promotes the crystallization of amorphous SiCN ceramics matrix,and facilitates increment of the activation energy of C/SiCN.The creep stress acted on C/SiCN accelerates the crystallization of amorphous SiCN ceramics by producing stress field within C/SiCN. |
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| Keywords: | amorphous SiCN ceramics creep creep activation energy crystallization |
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