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Home  >  Journal list  >  MATERIALS TRANSACTIONS  >  Vol.43  No.8 (2002)  >  pp.2039-2043

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Amorphous Phase and Compact Solid Formation of Ti-(37.5-X) at%Si-X at%Fe (X=0-10) Powders by Mechanical Alloying and Pulse Current Sintering

Akihiro Matsumoto1), Keizo Kobayashi1), Toshiyuki Nishio1) and Kimihiro Ozaki1)
1) Institute for Structural and Engineering Materials, National Institute of Advanced Industrial Science and Technology

Ti–(37.5−X) at%Si–X at%Fe (X=0–10) powder mixtures have been mechanically alloyed in a planetary ball mill under an argon atmosphere for 180 ks. The milled alloy powders become amorphous and crystallization temperature is 843 K for X=5, being 90 K higher than that for X=0. Milled powders have been consolidated using a pulse current sintering process under 1.5 GPa. The porosity of an amorphous compact solid consolidated at 813 K is estimated to be 7.5% for X=5, being much lower than 24% for X=0. Fe addition to Ti–37.5 at%Si powder mixtures in mechanical alloying improves the stability of an amorphous phase and forming-ability of compact solid powders.

titanium-silicon alloy, iron addition, mechanical alloying, amorphous, pulse current sintering, high pressure application

Received: April 08, 2002
Accepted: July 01, 2002 , Published online: September 06, 2005
Copyright (c) 2005 The Japan Institute of Metals



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