| 纳米TiC对Si3N4基复合陶瓷材料性能和微观结构的影响 |
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| 引用本文： | 薛强,艾兴,赵军,周咏辉,袁训亮.纳米TiC对Si3N4基复合陶瓷材料性能和微观结构的影响[J].山东大学学报(工学版),2008,38(3):69-72. |
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| 作者姓名： | 薛强 艾兴 赵军 周咏辉 袁训亮 |
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| 作者单位： | 山东大学机械工程学院,山东,济南250061 |
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| 基金项目： | 教育部全国优秀博士学位论文作者专项基金
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教育部高等学校博士学科点专项科研基金
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山东省自然科学基金 |
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| 摘 要： | 用热压法制备了纳米TiC增韧补强的Si3N4基复合陶瓷材料，研究了不同TiC含量对复合陶瓷材料力学性能与微观结构的影响.结果表明：纳米TiC颗粒的添加对复合材料的力学性能的提高是有利的，当纳米TiC的质量分数为15%时，复合材料具备较优的力学性能，其抗弯强度、断裂韧性、HV硬度分别达到895MPa，8.03MPa.m1/2，15.06GPa；不同尺寸的Si3N4晶粒形成双峰结构，有利于复合材料性能的提高；其断裂机制为沿晶断裂和穿晶断裂的混合类型.
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| 关 键 词： | Si3N4复合陶瓷材料 微观结构 力学性能 断裂机制 |
| 收稿时间： | 2007-05-20 |
Effects of TiC nano-sized particle on the microstructure and properties of Si_3N_4 composite ceramics |
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| XUE Qiang,AI Xing,ZHAO Jun,ZHOU Yong-hui,YUAN Xun-liang.Effects of TiC nano-sized particle on the microstructure and properties of Si_3N_4 composite ceramics[J].Journal of Shandong University of Technology,2008,38(3):69-72. |
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| Authors: | XUE Qiang AI Xing ZHAO Jun ZHOU Yong-hui YUAN Xun-liang |
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| Affiliation: | School of Mechanical Engineering, Shandong University, Jinan 250061, China |
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| Abstract: | HP sintering technology was adopted to prepare Si3N4 composite ceramics.The effects of TiC nano-sized particle on the microstructure and the properties of composite ceramics were investigated.The results show that the composite ceramics possess optimum mechanical properties with a flexural strength of 895 MPa,fracture toughness of 8.03 MPa.m1/2 and hardness of 15.06 GPa when the TiC content is 15wt%.It was found that the microstructure with a distinct bimodal size distribution of grain diameters is benefici... |
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| Keywords: | Si3N4 based composite ceramics microstructure mechanical properties fracture mechanism |
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