Portal de Periódicos da CAPES

Promotion of Synthesis of TiAl Intermetallic Powder by Introducing Nitrogen into Milling Atmosphere.

1995; Volume: 42; Issue: 10 Linguagem: Inglês

10.2497/jjspm.42.1196

1880-9014

Hitoshi Hashimoto, Shinichi Sumi, Toshihiko Abe, Koichi Kamada, Toshihiro Yoshida,

nanoparticles nucleation surface interactions

We observed the formation process of Ti-Al intermetallic compound powder during mechanical alloying of a powder mixture of Ti and Al by using a tumbling ball mill and found that the formation of the intermetallic compound powder was promoted by nitrogen gas in a milling atmosphere. Based on this finding, we introduced a small quantity of nitrogen gas into the milling atmosphere in order to shorten the time required for producing the intermetallic compound powder and to improve its yield. As a result, we found that an intervenient introduction of 1vol.% nitrogen gas into the milling atmosphere can achieve a yield of 98.8% after milling for 1440ks.