Abstract
The isothermal sections of the Al-Sn-Co ternary system at 800 °C and 1000 °C were constructed by twenty-nine key samples and two solid–liquid diffusion couples using electron probe microanalysis and x-ray diffraction analysis. The results show that: (1) No ternary intermetallic compound was found in this ternary system at 800 °C and 1000 °C. (2) The solid solubility of Sn in the Al-Co binary compounds is very small. (3) As-cast Al47Sn47Co6, Al46Sn46Co8 and Al45Sn45Co10 (at.%) alloys exhibit the separated macroscopic morphologies. The reason is that the addition of Co can significantly promote the metastable liquid-phase separation in Al-Sn binary system. The newly determined phase equilibria may contribute to thermodynamic assessment and development of Al-based alloys.
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This work was supported by the National Natural Science Foundation of China (Grant No. 51771158).
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Liu, X.J., Zou, H.W., Zhang, J.B. et al. Phase Equilibria in the Al-Sn-Co Ternary System. J. Phase Equilib. Diffus. 40, 176–187 (2019). https://doi.org/10.1007/s11669-019-00712-4
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DOI: https://doi.org/10.1007/s11669-019-00712-4