| Dissolution-precipitation mechanism of self-propagating high-temperature synthesis of TiC-Cu cermets |
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| 作者姓名： | Guoqing Xiao Feng Duan Gang Zhang and Quncheng Fan School of Materials Science and Engineering Xi’an University of Architecture and Technology Xi’an China State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong University Xi’an China |
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| 作者单位： | [1]School of Materials Science and Engineering, Xi＇an University of Architecture and Technology, Xi＇an 710055, China [2]State Key Laboratory for Mechanical Behavior of Materials, Xi＇an Jiaotong University, Xi＇an 710049, China |
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| 摘 要： | The mechanism of self-propagating high-temperature synthesis (SHS) of TiC-Cu cermets was studied using a combustion front quenching method. Microstructural evolution in the quenched sample was observed using scanning electron microscope (SEM) with energy dispersive X-ray (EDX) spectrometry, and the combustion temperature was measured. The results showed that the com- bustion reaction started with local formation of Ti-Cu melt and could be described with the dissolution-precipitation mechanism, namely, Ti, Cu, and C particles dissolved into the Ti-Cu solution and TiC particles precipitated in the saturated Ti-Cu-C liquid solu- tion. The local formation of Ti-Cu melt resulted from the solid diffusion between Ti and Cu particles.
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| 关 键 词： | TiC-Cu金属陶瓷 温度传递 合成方法 显微结构 |
| 收稿时间： | 30 December 2006 |
Dissolution-precipitation mechanism of self-propagating high-temperature synthesis of TiC-Cu cermets |
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| Guoqing Xiao,Feng Duan,Gang Zhang,Quncheng Fan.Dissolution-precipitation mechanism of self-propagating high-temperature synthesis of TiC-Cu cermets[J].Journal of University of Science and Technology Beijing,2007,14(6):568-572. |
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| Authors: | Guoqing Xiao Feng Duan Gang Zhang Quncheng Fan |
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| Affiliation: | 1. School of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
2. State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China |
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| Abstract: | The mechanism of self-propagating high-temperature synthesis (SHS) of TiC-Cu cermets was studied using a combustion front quenching method. Microstructural evolution in the quenched sample was observed using scanning electron microscope (SEM) with energy dispersive X-ray (EDX) spectrometry, and the combustion temperature was measured. The results showed that the combustion reaction started with local formation of Ti-Cu melt and could be described with the dissolution-precipitation mechanism,namely, Ti, Cu, and C particles dissolved into the Ti-Cu solution and TiC particles precipitated in the saturated Ti-Cu-C liquid solution. The local formation of Ti-Cu melt resulted from the solid diffusion between Ti and Cu particles. |
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| Keywords: | TiC-Cu cermet self-propagating high-temperature synthesis microstructural evolution synthesis mechanism combustion front quenching method |
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