| ( Ti| Me) ( C,N) / Ni 的润湿性及其价电子结构 |
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| 引用本文： | 许育东,石敏,刘宁,陈名海,晁晟.( Ti| Me) ( C,N) / Ni 的润湿性及其价电子结构[J].复合材料学报,2005,22(4):75-80. |
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| 作者姓名： | 许育东 石敏 刘宁 陈名海 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, 合肥 230009 |
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| 基金项目： | 国家自然科学基金（50072003）;安徽省自然科学基金（03044902）;合肥工业大学科研发展基金（030301F） |
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| 摘 要： | 运用座滴法研究了( Ti , Me) (C , N) / Ni 体系的润湿性;运用经验电子理论( EET 理论) 计算了多元陶瓷相的价电子结构(VES) , 建立了陶瓷相化学成分与价电子结构的关系, 并建立了价电子结构与接触角的回归关系式。结果表明, 提高温度、延长保温时间均使体系接触角减小; 碳化物的添加使体系接触角进一步减小,碳化物改善润湿性能力的大小依次为: Mo2C > TaC > WC > VC > NbC。不同碳化物的添加均能导致最强键上共价电子数nA 增加, 其中添加VC 的影响最为明显, 依次为VC > Mo2C > NbC > WC > TaC。
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| 关 键 词： | ( Ti Me) (C N) / Ni 体系 润湿性 接触角 价电子结构 |
| 文章编号： | 1000-3851（2005）04-0075-06 |
| 收稿时间： | 07 25 2004 12:00AM |
| 修稿时间： | 2004-07-25 |
WETTABILITY OF ( Ti| Me) ( C, N) / Ni SYSTEM AND VALENCE ELECTRONSTRUCTURES OF MULTIPLE CERAMIC PHASES |
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| XU Yudong,SHI Min,LIU Ning,Chen Minghai,CHAO Sheng.WETTABILITY OF ( Ti| Me) ( C, N) / Ni SYSTEM AND VALENCE ELECTRONSTRUCTURES OF MULTIPLE CERAMIC PHASES[J].Acta Materiae Compositae Sinica,2005,22(4):75-80. |
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| Authors: | XU Yudong SHI Min LIU Ning Chen Minghai CHAO Sheng |
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| Affiliation: | School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China |
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| Abstract: | The wettability of a ( Ti , Me) (C , N) / Ni system was studied by using the sessile drop method. Thevalence elect ron st ructure (VES) of ceramic multiphase in cermets was calculated by using EET theory and relationship s among chemical compositions , valence elect ron st ructure and contact angle were established by means of regression. Wetting test s reveal that the contact angle (θ) reduces continuously with the increase of temperature andholding time and decreases definitely with the increase of carbides content , while the impact order of the carbides onθis Mo2C > TaC > WC > VC > NbC. It can be deduced f rom EET calculations that the covalent elect rons on thest rongest bond in ceramic phases ( nA ) increase with the content of carbides , and the impact order is VC > Mo2C >NbC > WC > TaC. |
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| Keywords: | (Ti Me)(C N)/Ni system wettability contact angle valence electron structure |
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