Process for producing TiB.sub.2 -dispersed TiAl-based composite material
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsTakashi Morikawa, Hiroyuki Shamoto, Tetsuya Suganuma
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Abstract
A TiAl intermetallic compound source and a boride which is less stable than TiB.sub.2 are mixed and melted, followed by solidification to form a TiB.sub.2 -dispersed TiAl-based composite material in which the TiB.sub.2 is contained in an amount of 0.3 to 10% by volume. In this process, the dispersed TiB.sub.2 particles become very fine, so that the hardness as well as the elongation and bending strength of the TiAl material are improved by the finely dispersed TiB.sub.2 particles.
Claims7
A process for producing a TiB.sub.2 -dispersed TiAl-based composite material, comprising the steps of:
- forming a molten mixture of a TiAl intermetallic compound source and at least one boride which is less stable than TiB.sub.2 selected from the group consisting of ZrB.sub.2, NbB.sub.2, MoB.sub.2, CrB, WB, VB and HfB, and
- cooling and solidifying said molten mixture to form a TiAl-based composite material in which TiB.sub.2 is dispersed in an amount of 0.3 to 10% by volume of the composite material.
Dependencies are inferred from the claim text.