| Ti(C,N)_w/Ti(C,N)基金属陶瓷的组织与力学性能研究 |
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| 引用本文： | 向阳开,徐智谋.Ti(C,N)_w/Ti(C,N)基金属陶瓷的组织与力学性能研究[J].硬质合金,2006,23(3):129-133. |
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| 作者姓名： | 向阳开 徐智谋 |
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| 作者单位： | 1. 株洲硬质合金集团有限公司,株洲,412000
2. 华中科技大学光电子科学与工程学院,武汉,430074 |
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| 基金项目： | 国家高技术研究发展计划(863计划);中国博士后科学基金 |
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| 摘 要： | 采用Ti(C,N)晶须和颗粒复合粉末(Ti(C,N)w+Ti(C,N)p)制备Ti(C,N)w/Ti(C,N)基金属陶瓷。研究了复合粉末对金属陶瓷组织及性能的影响。结果表明,Ti(C,N)w的加入,金属陶瓷的各项力学性能都得到了提高。组织表现为环形相结构特征,与Ti(C,N)基金属陶瓷相比,双层环形相结构所占比例增大,且尺寸加厚。烧结组织中Ti(C,N)w的长径比大于临界长径比,在强化金属陶瓷方面起着重要的作用。环形相使Ti(C,N)w与基体界面结合紧密,增韧机制主要表现为裂纹桥联和裂纹偏转,拔出效应不明显。
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| 关 键 词： | Ti(C N)w/Ti(C N)基金属陶瓷 组织 性能 |
| 收稿时间： | 2006-05-12 |
| 修稿时间： | 2006年5月12日 |
Microstructure and Mechanical Performance of Ti(C,N)w/Ti(C,N)-based Ceramets |
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| Xiang Yangkai,Xu Zhimou.Microstructure and Mechanical Performance of Ti(C,N)w/Ti(C,N)-based Ceramets[J].Cemented Carbide,2006,23(3):129-133. |
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| Authors: | Xiang Yangkai Xu Zhimou |
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| Affiliation: | 1.Zhuzhou Cemented Carbide Works, Zhuzhou 412000; 2.Institute of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074,China |
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| Abstract: | Ti(C,N)w/Ti(C,N)-based ceramets were produced using the self-made Ti(C,N)w+Ti(C,N)p powders. Effects of Ti(C,N)w+Ti(C,N)p addition on the microstructure and properties were studied. The results suggest that mechanical performance is improved because of Ti(C,N)w+Ti(C,N)p addition. Ti(C,N)w /Ti(C,N)-based cermets exhibit a core-shell structure. The content and size of dual-layer core-shell structure is increased in the Ti(C,N)w /Ti(C,N)-based cermets. The length/diameter ratio of Ti(C,N)w in ceramets is greater than the critical length/diameter ratio. Ti(C,N)w plays an important role in the strengthening cermets. The core-shell structures make the interface between Ti(C,N)w and substrate compact. The toughening mechanism of Ti(C,N)w/Ti(C,N)-based ceramets is crack bridging and crack deflection. Ti(C,N)w pullout is not evident. |
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| Keywords: | Ti(C N)w/Ti(C N)-based ceramets microstructure performance |
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