Forming of Ti-Al intermetallic compound by pulsed current sintering

被引：0

作者：

Kobayashi, Keizo ^{[1
]}

Matsumoto, Akihiro ^{[1
]}

Ozaki, Kimihiro ^{[1
]}

Nishio, Toshiyuki ^{[1
]}

机构：

[1] National Inst. of Adv. Indust. Sci., Inst. for Struct. and Eng. Materials, 2266-98 Anagahora, Shimoshidami, Moriyama-ku, Nagoya 463-8560, Japan

来源：

Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy | 2002年 / 49卷 / 10期

关键词：

Amorphous materials - Ball milling - Composition - Consolidation - Intermetallics - Mechanical alloying - Mixing - Mixtures - Shrinkage - Sintering - Synthesis (chemical) - Thermal expansion;

D O I：

10.2497/jjspm.49.910

中图分类号：

学科分类号：

摘要：

Ti-10mass%Al and Ti-30mass%Al alloys were synthesized by mechanical alloying of elementary Ti powder and Al powder using a planetary ball milling for 360 ks. The obtained Ti-10mass%Al powder milled for 360 ks was identified as α-Ti phase including Al. Ti-30mass% Al powder milled for 360 ks was identified as amorphous state with fine crystals. The mixtures with the composition of Ti-34mass% Al, which were prepared by mixing of MA powders and Al powder, were shown endothermic reaction of Al melt at 930 K in DTA curves. Ti-34mass% Al sample, which was prepared by mixing of mechanically alloyed Ti-30mass% Al powder and Al powder, was consolidated to a complicated shape by pulsed current sintering. After a large amount of shrinkage induced by Al melting was observed in sintering. Ti-Al intermetallic compounds were synthesized by the reaction between mechanically alloyed powder and Al. The sintered compact with a complicated shape cracked during cooling because of the difference of thermal expansion between graphite die and Ti-Al intermetallic compound. The existence of molten Al during the sintering was effective to fabricate a thin sintered compact with a simple shape.

引用

页码：910 / 914

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