MATERIALS TRANSACTIONS
Evaluation of Yttria Applicability as a Crucible for Induction Melting of TiAl Alloy
Toshimitsu TetsuiToshiharu KobayashiTakashi MoriTatsuya KishimotoHiroshi Harada
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Volume 51 (2010) Issue 9 Pages 1656-1662

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Abstract

In seeking cost reductions for precision cast parts made of TiAl alloy, application of induction melting using a ceramic crucible would be highly effective. Accordingly, consideration was given to the applicability of yttria as the material basis for such a ceramic crucible. Crucible specifications were first investigated, and a prototype crucible was fabricated with a suitable mixture ratio of raw materials from the standpoint of satisfactory thermal shock resistance and low reactivity with TiAl molten metal. As a result of induction melting testing of Ti-46 at%Al alloy, the developed crucible was found to facilitate substantially less contamination of the TiAl alloy, with lower oxygen concentration and hardness as compared with other conventional ceramic crucibles.

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© 2010 The Japan Institute of Metals and Materials
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