Densification behavior of high Nb containing TiAl alloys through reactive hot pressing

被引：5
|
作者：
Wang, Yanhang
Lin, Junpin [1 ]
He, Yuehui
Wang, Yanli
Chen, Guoliang
机构：
[1] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China
[2] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China
来源：
JOURNAL OF UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING | 2007年 / 14卷 / 03期
关键词：
TiAl based alloy; powder metallurgy; densification; hot pressing;
D O I：
10.1016/S1005-8850(07)60048-6
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Densification behavior of high Nb containing TiAl alloys through reactive hot pressing was investigated. The results showed that the density of the sample hot pressed at 1400 degrees C could reach a near full density of 98.37%. However, the densification abnormality was observed at 1500 degrees C. The diffusion of elemental Nb during microstructural evolution is an important aspect affecting densification, which will form pore nests. With the increase of hot pressing temperature, the diffusion of Nb becomes more adequate. HIP (Hot isostatic pressing) treatment can only decrease porosity to some extent, but cannot eliminate it completely.
引用
收藏
页码：251 / 255
页数：5
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