Solidification pathways and phase equilibria in the Mo-Ti-C ternary system

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The liquidus surface projection and isothermal section at 1,800°C in the Mo-Ti-C ternary system are examined using arc-melted alloys. A ternary transition peritectic reaction (L + Mo2C → Mo + TiC) takes place during solidification, which is apparently different from the ternary eutectic reaction (L → Mo + TiC + Mo2C) observed in a previous report. Since the composition of the eutectic reaction (L → Mo + TiC) shifts toward the Mo-Ti binary line with increasing Ti concentration, the volume fraction of the Mo phase and the interlamellar spacing of the Mo and TiC phases increase in the eutectic microstructure. At 1,800°C, the TiC phase in equilibrium with the Mo phase can contain more than 28 at% Mo and a Mo/TiC/Mo2C three-phase region exists at around Mo-15Ti-10C.

Original languageEnglish
Pages (from-to)164-170
Number of pages7
JournalHigh Temperature Materials and Processes
Issue number1
Publication statusPublished - 2020 Jan 1


  • Mo-Ti-C ternary system
  • phase equilibria
  • solidification


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