Liquid-Solid Phase Equilibria of Nb-

Liquid-Solid Phase Equilibria of Nb-Si-Ti Ternary Alloys

To determine the liquid-solid phase equilibria of the Nb-Si-Ti ternary system,Nb-Si-Ti alloys of different compositions are prepared.By means of scanning electron microscopy (SEM),X-ray diffraction (XRD) and electron probe microanalysis (EPMA),the phases in the alloys,such as Si-based solutions,Ti(Nb)Si,Ti(Nb)Si2,Nb(Ti)Si2,Ti(Nb)5Si4,Nb(Ti)5Si3,Ti(Nb)5Si3,Nb(Ti)3Si and N'b-based solutions are identified,and the phase evolution is analyzed.As a result,the microstructural and mierochemical evidence pro vides a clear definition of the Nb-Si-Ti liquidus surface projection and indicates that the ternary phase diagram has seven transition reactions.

作 者： Bao Jing Huang Qiang Tang Liang Geng Tai Zhao Xinqing Ma Chaoli   作者单位： Bao Jing,Huang Qiang,Tang Liang,Zhao Xinqing,Ma Chaoli(School of Materials Science and Engineering,Beijing University of Aeronautics and Astronautics,Beijing 100083,China)

Geng Tai(School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China) 

刊 名： 中国航空学报（英文版）  ISTIC 英文刊名： CHINESE JOURNAL OF AERONAUTICS  年，卷(期)： 2008 21(3)  分类号： V2  关键词： Nb-Si-Ti   ternary   phase equilibria   liqudus projection  

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