| Phase Equilibria in Nb-Si-Mo Ternary Alloys at 1273 K and 2073 K |
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| 作者单位： | Huang Qiang，Ma Chaoli，Zhao Xinqing，Xu Huibin School of Materials Science and Engineering，Beijing University of Aeronautics and Astronautics，Beijing 100191，China |
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| 基金项目： | Foundation items： National High-tech Research and Development Program （2006AA03ZI02）; Aeronautical Science Foundation of China （2006ZF51069） |
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| 摘 要： | Phase equilibrium in Nb-Si-Mo ternary alloys （〈37.5 at.% Si） at 1 273 K and 2 073 K is investigated by using X-ray diffraction （XRD） analysis, scanning electron microscopy （SEM） and energy dispersive spectroscopy （EDS）. The partial isothermal section at 1 273 K, which contains four single-phase regions, five two-phase regions and two three-phase regions, is basically the same as that at 1 973 K. However, when the temperature increases to 2 073 K, the three-phase region of Nbss＋ct-（Nb（Mo））sSi3＋13-（Nb,Mo）sSi3 obviously moves towards the Nb-rich comer. This suggests that Nb-Si-Mo ternary alloys remain stable at least up to 1 973 K.
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| 关 键 词： | 复合材料 等温截面 相变平衡 微结构 |
| 收稿时间： | 5 November 2007 |
Phase Equilibria in Nb-Si-Mo Ternary Alloys at 1 273 K and 2 073 K |
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| Authors: | Huang Qiang Ma Chaoli Zhao Xinqing Xu Huibin |
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| Institution: | School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China |
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| Abstract: | Phase equilibrium in Nb-Si-Mo ternary alloys (＜37.5 at.% Si) at 1 273 K and 2 073 K is investigated by using X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The partial isothermal section at 1 273 K, which contains four single-phase regions, five two-phase regions and two three-phaso regions, is basically the same as that at 1 973 K. However, when the temperature increases to 2 073 K, the three-phase region of Nbss α-(Nb(Mo))sSi3 β-(Nb,Mo)5Si3 obviously moves towards the Nb-rich comer. This suggests that Nb-Si-Mo ternary alloys remain stable at least up to 1 973 K. |
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| Keywords: | Nb/Nb5Si3 in-situ composite isothermal section phase equilibria microstructure |
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