| Al2O3—SiCw复合陶瓷的组织结构 |
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| 引用本文： | 刘玉先,赵春霞.Al2O3—SiCw复合陶瓷的组织结构[J].物理测试,1994(2):4-8. |
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| 作者姓名： | 刘玉先 赵春霞 |
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| 作者单位： | 山东工业大学，山东工业大学 济南 250014，济南 250014 |
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| 摘 要： |
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| 关 键 词： | 碳化硅 晶须 复合陶瓷 精细结构 |
Micro structure of the A12O3 - SiCwComposite Ceramics |
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| Liu Yuxian,Shandong Polytechnic University,Jinan.Micro structure of the A12O3 - SiCwComposite Ceramics[J].Physics Examination and Testing,1994(2):4-8. |
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| Authors: | Liu Yuxian Shandong Polytechnic University Jinan |
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| Affiliation: | Liu Yuxian,Shandong Polytechnic University,Jinan,250014 |
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| Abstract: | The compositions, morphologies and microstructures of the AI2O3-SiCw composite ceramic were studied by SEM and TEM. The results show that the ceramic material has framework structure, in which A12O3 and SiCw insert each other and combine compactly. The orientation of whisker distributes stochastically and its structure is 15R type. The matrix is a-Al2O3 with hexagonal structure. Dislocations, twins and stacking faults were observed in the whiskers. The Vicker hardness of the ceramic material is 23.5GPa, The fracture toughness K1c is 7.91MPa calculated by the crack length of impression and hardness. The morphology of crack propagation indicate that there is the toughening mechanism of whisker's pull -out and crack deflection. |
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| Keywords: | SiC whisker composite ceramic fine-structure toughening-reinforcement |
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