MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
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 MatsumotoKeizo KobayashiToshiyuki NishioKimihiro Ozaki
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2002 Volume 43 Issue 8 Pages 2039-2043

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Abstract

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.

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© 2002 The Japan Institute of Metals and Materials
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