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