| TiN-SiC复合陶瓷材料的研制 |
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| 引用本文： | 向其军,刘咏,刘伯威,张永红. TiN-SiC复合陶瓷材料的研制[J]. 硬质合金, 2005, 22(2): 78-81 |
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| 作者姓名： | 向其军 刘咏 刘伯威 张永红 |
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| 作者单位： | 中南大学粉末冶金国家重点实验室,湖南,长沙,410083 |
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| 基金项目： | 国家“863”高技术项目(2001AA332010) |
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| 摘 要： | 以Ti、Si3N4、石墨和α-SiC粉体为原料,通过反应热压合成了TiN-SiC复合陶瓷材料。研究结果表明:在TiN-SiC复合陶瓷材料中,TiN和SiC晶粒细小均匀,无异常晶粒长大现象,TiN晶粒尺寸为1μm～7μm,SiC均匀分布于TiN之间;该复合材料的密度、维氏硬度和断裂韧性分别为4.41g/cm3、13.6GPa和6.89MPa·m1/2,其增韧机制主要为裂纹偏转和裂纹分叉机制。
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| 关 键 词： | TiN SiC 制备 复合陶瓷 |
| 修稿时间： | 2004-09-27 |
Preparation of TiN-SiC Composite Ceramics |
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| Xiang Qijun,Liu Yong,Liu Bowei,Zhang Yonghong. Preparation of TiN-SiC Composite Ceramics[J]. Cemented Carbide, 2005, 22(2): 78-81 |
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| Authors: | Xiang Qijun Liu Yong Liu Bowei Zhang Yonghong |
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| Abstract: | TiN-SiC composite ceramics was prepared by reactive hot-pressing with Ti, Si3N4, graphite and α-SiC powders as raw materials. Results show that both TiN and SiC in the composite have thin-grained and homogeneous microstrcture, the grain size of TiN is about 1μm ~7μm. The density,Vickers hardness and fracture toughness of TiN-SiC composite ceramics are 4.41g/cm3,13.6 GPa and 6.89 MPa·m1/2, respectively. The crack deflection and crack branching are major mechanisms for increasing the fracture toughness in the composite ceramics. |
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| Keywords: | TiN SiC preparation composite ceramics |
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