Phase equilibria in Co-Al-Re ternary system at 1100 and 1300 °C
(1. Fujian Provincial Key Laboratory of Materials Genome, College of Materials, Xiamen University, Xiamen 361005, China;
2. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China;
3. School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, China)
2. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China;
3. School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, China)
Abstract: Isothermal sections of the Co-Al-Re ternary system at 1100 and 1300 °C were determined experimentally by electron probe microanalysis and X-ray diffraction. The results show that there are seven three-phase regions in the 1100 °C isothermal section and five three-phase regions in the 1300 °C isothermal section. The solid solubilities of αCo, εRe and CoAl increase a little with temperature increasing from 1100 to 1300 °C. The solubility of Co in compounds AlRe2, Al11Re4 and Al4Re is negligible, <1.5 at.%. And no ternary compounds are found.
Key words: Co-Al-Re; phase equilibria; isothermal section