Abstract
Pure Mo was incorporated in TiAl matrixvia two different routes: (1) hot pressing of alternately sandwiched Ti-Al sheets and Mo foils; and (2) coextrusion and heat treatment of Ti-Al green compact and Mo rod. The reaction zone between TiAl and Mo is found to contain two intermetallic phases: β-(Mo,Ti)Al andp-(Mo,Ti)3Al. The β-p boundary is incoherent, whereas the TiAl-β andp-Mo boundaries are semicoherent. The reaction zone grows with increasing heat-treatment time in a parabolic form. The incorporated Mo exhibits lower hardness than the TiAl matrix, implying that ductilizing and toughening of TiAl by introducing Mo as a ductile reinforcement are possible.
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Hsu, F.Y., Wang, G.X., Klaar, H.J. et al. Investigation of the reaction zone between TiAl and Mo. Metall Mater Trans A 27, 2285–2292 (1996). https://doi.org/10.1007/BF02651882
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DOI: https://doi.org/10.1007/BF02651882