Evaluation of Ti3Si Phase Stability from Heat-Treated, Rapidly Solidified Ti-Si Alloys


Ti-base alloys containing significant amounts of silicon have been considered for high temperature structural applications. Thus, information concerning phase stability on the Ti-Si system is fundamental and there are not many investigations covering the phase stability of the Ti3Si phase, specially its dependence on oxygen/nitrogen contamination. In this work the stability of this phase has been evaluated through heat-treatment of rapidly solidified Ti-rich Ti-Si alloys at 700 °C and 1000 °C. The rapidly solidified splats presented nanometric scale microstructures which facilitated the attainment of equilibrium conditions. The destabilization of Ti3Si due to oxygen/nitrogen contamination has been noted.

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Correspondence to Carlos Angelo Nunes.

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da Silva Costa, A.M., de Lima, G.F., Rodrigues, G. et al. Evaluation of Ti3Si Phase Stability from Heat-Treated, Rapidly Solidified Ti-Si Alloys. J. Phase Equilib. Diffus. 31, 22–27 (2010). https://doi.org/10.1007/s11669-009-9610-2

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  • silicides
  • Ti alloys
  • Ti-Si system
  • Ti3Si