Phase Diagram and Phase Equilibrium Studies on Ultra High Temperature Alloys of Nb-Si-Ti

Abstract:

Due to their high melting temperatures, low densities and excellent high-temperature strengths, Nb-Si-Ti-based ultra high temperature alloys shows great potential for vane materials on the next generation of high thrust-weight ratio aero-engines. In the present paper, the Nb-Si-Ti ternary system was studied, the phase diagram of Nb-Si-Ti and the phase fraction calculated, and the curve of solidification process established. The calculated results provide primary guidance for developing Nb-Si-Ti-X ultrahigh temperature alloys. Moreover, it is very useful as a guide for alloy design and processing development.

• Periodical: Materials Science Forum (Volume 849)
• Pages: 618-625
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.849.618
• Online since: March 2016
• Authors: Jin San Wang, Yong Wang Kang, Chang Rong Li
• Keywords: Nb-Si-Ti, Phase Diagram, Phase Equilibrium, Solidification, Thermodynamic

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