| 纳米SiC晶须增强Ti(C,N)基金属陶瓷的显微组织与力学性能 |
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| 引用本文： | 瞿峻,熊惟皓,柯阳林,刘文俊,叶大萌,姚振华.纳米SiC晶须增强Ti(C,N)基金属陶瓷的显微组织与力学性能[J].机械工程材料,2009(12). |
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| 作者姓名： | 瞿峻 熊惟皓 柯阳林 刘文俊 叶大萌 姚振华 |
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| 作者单位： | 华中科技大学材料成形与模具技术国家重点实验室; |
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| 基金项目： | 国家自然科学基金重点基金资助项目(50634060); 国家自然科学基金资助项目(50074014) |
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| 摘 要： | 采用真空烧结法制备了纳米SiC晶须增强Ti(C,N)基金属陶瓷复合材料,用XRD、FESEM、EDS、万能试验机及维氏硬度仪等手段研究了纳米SiC晶须对复合材料显微组织和抗弯强度及断裂韧度的影响。结果表明:复合材料的显微组织具有典型的芯-壳结构,主要由黑色的硬质核心相,灰色的环形相,灰白色的粘结相以及部分分布于外环形相/粘结相界面、部分弥散分布于粘结相中的白色增强相组成;随着纳米SiC晶须添加量的增加,粘结相的体积分数减小,增强相的体积分数增大;与未添加晶须的金属陶瓷相比,复合材料的抗弯强度和断裂韧度均有显著提高,当纳米SiC晶须的体积分数为7.5%时,复合材料的力学性能最佳,抗弯强度为2 346 MPa,断裂韧度为16.82 MPa·m~(1/2)。
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| 关 键 词： | Ti(C N)基金属陶瓷 纳米SiC晶须 显微组织 力学性能 |
Microstructure and Mechanical Properties of Nano-SiC Whisker Reinforced Ti(C, N)-Based Cermets |
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| QU Jun,XIONG Wei-hao,KE Yang-lin,LIU Wen-jun,YE Da-meng,YAO Zhen-hua.Microstructure and Mechanical Properties of Nano-SiC Whisker Reinforced Ti(C, N)-Based Cermets[J].Materials For Mechanical Engineering,2009(12). |
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| Authors: | QU Jun XIONG Wei-hao KE Yang-lin LIU Wen-jun YE Da-meng YAO Zhen-hua |
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| Affiliation: | QU Jun,XIONG Wei-hao,KE Yang-lin,LIU Wen-jun,YE Da-meng,YAO Zhen-hua (State Key Laboratory of Material Processing and Die & Mould Technology of China,Huazhong University of Science & Technology,Wuhan 430074,China) |
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| Abstract: | The nano-SiC whisker reinforced Ti(C,N)-based cermets composite was fabricated with vacuum sintering technology.The effect of nano-SiC whisker on the microstructure,transverse rupture strength (TRS) and fracture toughness (K_(IC)) was studied by XRD,FESEM with EDS,universal testing machine and Vickers hardness tester.The results show that the microstructure exhibited the classical core-rim morphology composed of black core phase,gray surrounding phase,grayish-white binder phase and white reinforced-phase wh... |
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| Keywords: | Ti(C N)-based cermets nano-SiC whisker microstructure mechanical property |
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