| Mo 添加量对纳米改性金属陶瓷显微组织的影响 |
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| 引用本文： | 许育东,刘宁,石敏,韩成良,晁晟.Mo 添加量对纳米改性金属陶瓷显微组织的影响[J].矿冶工程,2005,25(2):77-80. |
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| 作者姓名： | 许育东 刘宁 石敏 韩成良 晁晟 |
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| 作者单位： | 合肥工业大学材料科学与工程学院, 安徽合肥230009 |
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| 基金项目： | 国家自然科学基金项目(No.50072003)，安徽省自然科学基金项目(No.03044902)，合肥工业大学科研发展基金项目(No.030301F) |
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| 摘 要： | 研究了Mo 添加量对铣削用TiC-TiN(nm)-WC-Mo2C-Ni-Co 金属陶瓷的组织特征、力学性能和断口形貌的影响。结果表明,金属陶瓷的组织为典型的两相结构特征, 其中陶瓷相的芯/壳结构(core/rim structure)与溶解析出机制有关。少量Mo的加入能提高材料的力学性能。断口SEM 分析表明:断裂机理为典型的混合型断裂(穿晶断裂和沿晶断裂), 金属相存在着明显撕裂的痕迹。
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| 关 键 词： | 纳米改性 金属陶瓷 组织特征 |
| 文章编号： | 0253-6099(2005)02-0077-04 |
| 收稿时间： | 2004-10-18 |
| 修稿时间： | 2004年10月18 |
Effects of Mo Addition on Microstructure of Nano Modified Cermets |
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| XU Yu-dong,LIU Ning,SHI Min,HAN Cheng-liang,CHAO Sheng.Effects of Mo Addition on Microstructure of Nano Modified Cermets[J].Mining and Metallurgical Engineering,2005,25(2):77-80. |
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| Authors: | XU Yu-dong LIU Ning SHI Min HAN Cheng-liang CHAO Sheng |
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| Affiliation: | School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, Anhui, China |
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| Abstract: | A study was made on the effects of Mo addition on the microstructural characteristics, mechanical properties and fractography of nano-TiN modified cermets which are applied to milling tools. The results show that the cermet exhibits a typical two-phase microstructure (i.e. metallic phase and ceramic phase embedded in the metallic phase). The formation of core/rim structure of the ceramic phase is relevant to the dissolution and deposition mechanism. A small addition of Mo can improve the mechanical properties of the cermets. In addition, a SEM analysis of the fracture surface suggests there is a mixture cracking mechanism (transgranular failure and intergranular failure), and that the metallic phase has apparent tears. |
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| Keywords: | nano-modification cermet microstructural feature |
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