Keizo Kobayashi, Akihiro Matsumoto, Toshiyuki Nishio and Kimihiro Ozaki
Institute for Structural and Engineering Materials, National Institute of Advanced Industrial Science and Technology, Nagoya 463-8560
Ti-2 at%Fe-10 at%Si amorphous powder was synthesized by mechanical alloying (MA) of pure Ti, Fe and Si powders using a planetary ball milling for 1440 ks. The crystallization temperature of the obtained amorphous powder was about 830 K.
Ti-2 at%Fe-10 at%Si amorphous powder was consolidated using a pulsed current sintering (PCS) process at a die temperature of 773 K under a pressure of 372 MPa. The compact was densified at the die temperature between 743 K and 763 K with the crystallization of amorphous phase. The obtained Ti-2 at%Fe-10 at%Si alloy consists mainly of nanocrystalline α-Ti phase. The compressive strength of the nanocrystalline compact at a room temperature was more than 1.7 GPa, which was much higher than that of the commercial Ti-6 mass%Al-4 mass%V alloy.
(Received December 4, 2002)
mechanical alloying, pulsed current sintering, Ti-2 at%Fe-10 at%Si, nanocrystalline, amorphous
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