Phase Equilibria in Nb-Si-Mo Ternary Alloys at 1 273 K and 2 073 K

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.

作 者： Huang Qiang Ma Chaoli Zhao Xinqing Xu Huibin   作者單位： School of Materials Science and Engineering,Beijing University of Aeronautics and Astronautics,Beijing 100191,China  刊 名： 中國(guó)航空學(xué)報(bào)(英文版)  ISTIC 英文刊名： CHINESE JOURNAL OF AERONAUTICS  年，卷(期)： 2008 21(5)  分類(lèi)號(hào)： V2  關(guān)鍵詞： Nb/Nb5Si3 in-situ composite   isothermal section   phase equilibria   microstructure  

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