Abstract
The effects of Ti addition on the liquid-phase separation of Cu71Cr29 alloy have been investigated. It is revealed that Ti addition can partly suppress the liquid-phase separation of the alloy melts, resulting in refining of Cr-rich particles formed after liquid-phase separation during rapid cooling. Nanoscaled Cr2Ti and Cu4Ti phases precipitate in the annealed Cu-Cr-Ti ribbons when Ti content attains 2.5 pct. The thermodynamic analyses indicate that the large positive mixing heat between Cu and Cr is reduced by the addition of Ti, leading to the liquid-phase separation occurring at a lower temperature and being driven by a smaller force. However, more Cr and Ti dissolve in Cu solid solution when Ti content is more than 3 pct, and as a result, the electrical resistivity of the ribbons is increased sharply.
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Supported by the National Natural Science Foundation of China (50371066).
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Manuscript submitted November 5, 2006.
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Sun, Z., Guo, J., Li, Y. et al. Effects of Ti Addition on the Liquid-Phase Separation of Cu71Cr29 Alloy during Rapid Cooling. Metall Mater Trans A 39, 1054–1059 (2008). https://doi.org/10.1007/s11661-008-9466-9
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DOI: https://doi.org/10.1007/s11661-008-9466-9