Metals (Nov 2018)

Phase Equilibria of the Co-Ti-Ta Ternary System

  • Cuiping Wang,
  • Xianjie Zhang,
  • Lingling Li,
  • Yunwei Pan,
  • Yuechao Chen,
  • Shuiyuan Yang,
  • Yong Lu,
  • Jiajia Han,
  • Xingjun Liu

DOI
https://doi.org/10.3390/met8110958
Journal volume & issue
Vol. 8, no. 11
p. 958

Abstract

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The phase equilibria of the Co-Ti-Ta ternary system at 1000 °C, 1100 °C, and 1200 °C were experimentally investigated using an electron probe microanalyzer and X-ray diffraction. Experimental results show that: (1) No ternary compound exists in the studied isothermal sections; (2) the β(Ti) and β(Ta) phases form the continuous solid solution β(Ti,Ta) in the Ti-Ta side; (3) the solubility of Ta in the (αCo) is less than 5%; (4) the phases of Co2Ti(h) and γ-Co2Ta, Co2Ti(c) and β-Co2Ta form the continuous solid solutions Co2(Ta,Ti)(h) and Co2(Ta,Ti)(c), respectively.

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