Liquid-Solid Phase Equilibria of Nb-Si-Ti Ternary Alloys |
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| Authors: | Bao Jing Huang Qiang Tang Liang Geng Tai Zhao Xinqing Ma Chaoli |
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| Institution: | [1]School of Materials Science and Engineering, Beijing University of Aeronautics and Astronauties, Beijing 100083, China [2]School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China |
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| Abstract: | 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. |
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| Keywords: | Nb-Si-Ti ternary phase equilibria liqudus projection |
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