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

作者：Huang Qiang; Ma Chaoli; Zhao Xinqing^*; Xu Huibin

来源：Chinese Journal of Aeronautics, 2008, 21(5): 448-454.

• Nb/Nb5Si3 in-situ composite
• isothermal section
• phase equilibria
• microstructure

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+alpha-(Nb(Mo))(5)Si-3+beta-(Nb,Mo)(5)Si-3 obviously moves towards the Nb-rich corner. This suggests that Nb-Si-Mo ternary alloys remain stable at least up to 1 973 K.

• 出版日期2008-10
• 单位北京航空航天大学