Densification abnormality in reactive hot pressing of Ti and Al elemental powders

来源期刊：中国有色金属学报(英文版)2000年第4期

论文作者：刘咏 黄伯云 贺跃辉 周科朝

文章页码：453 - 455

Key words：TiAl base alloy; densification; powder metallurgy; microstructure

Abstract: The densification behavior of a TiAl base alloy prepared by elemental powder metallurgy has been studied. It is found that a densification abnormality occurs at 1 400℃, i.e. the compact density decreases with the increase of hot pressing temperature. By microstructural observation, including optical microscopy and TEM, it has been concluded that the densification abnormality can be attributed to the different high temperature creep mechanisms induced by microstructure coarsening in the late period of densification.