| 三维碳化硅/碳化硅陶瓷基编织体复合材料 |
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| 引用本文： | 徐永东,成来飞,张立同.三维碳化硅/碳化硅陶瓷基编织体复合材料[J].无机材料学报,2001(2). |
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| 作者姓名： | 徐永东 成来飞 张立同 |
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| 作者单位： | 西北工业大学凝固技术国家重点实验室!西安710072 |
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| 摘 要： | 采用化学气相浸渗法（ＣＶＩ），制备出三维Ｈｉ－ＮｉｃａｌｏｎＳｉＣ／ＳｉＣ陶瓷基编织体复合材料．经３０ｈ ＣＶＩ致密化处理后，复合材料的密度达到 ２５９·ｃｍ－３，所研制的三维 ＳｉＣ／ＳｉＣ复合材料不仅具有较高的强度，而且表现出优异的韧性和类似金属材料非灾难性的断裂特征．复合材料的主要力学性能指标为：弯曲强度 ８６０ＭＰａ，断裂位移 １．２ｍｍ，断裂韧性４１．５ＭＰａ·ｍ１／２，断裂功２８．１ｋＪ·ｍ－２，冲击韧性３６．０ｋＪ·ｍ－２．
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| 关 键 词： | 化学气相浸渗法 三维SiC/SiC复合材料 力学性能 显微结构 |
Three Dimensional Textile SiC/SiC Composites by Chemical Vapor Infiltration |
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| XU Yong-Dong,CHENG Lai-Fei,ZHANG Li-Tong.Three Dimensional Textile SiC/SiC Composites by Chemical Vapor Infiltration[J].Journal of Inorganic Materials,2001(2). |
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| Authors: | XU Yong-Dong CHENG Lai-Fei ZHANG Li-Tong |
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| Abstract: | Three dimensional textile SiC/SiC composites were fabricated by chemical vapor infiltration, and their mechanical properties and microstructure were investigated. The density of the composites was 2.5g.cm-3 after the preform was infiltrated for 30 hours. The present composite materials exhibited excellent mechanical properties and metal-like failure behavior. The flexcural strength and displacement were 860MPa and 1.2mm, respectively. Fracture toughness and work of fracture were 41.5MPa.m1/2 and 28.1kJ.m-2, respectively. The dynamic toughness was determined by using Charpy impact method and its value was 36.0kJ.m-2. |
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| Keywords: | chemical vapor infiltration 3D SiC/SiC composites mechanical properties microstructure |
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