Design and microstructures of Ti/TiAl/Al system functionally graded material

被引：28
|
作者：
Xiong, HP [1 ]
Shen, Q
Li, JG
Zhang, LM
Yuan, RZ
机构：
[1] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China
[2] Inst Aeronaut Mat, Welding Div, Beijing 100095, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE LETTERS | 2000年 / 19卷 / 11期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1023/A:1006784709652
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
TiAl to Al was joined using an Al-based brazing filler metal. It is found that during brazing process, the element Si in the brazing alloy diffused to surface of TiAl, Ti-Si compound being produced there. The dense Ti/TiAl/Al graded material was fabricated by hot-press sintering of Ti/Ti+TiAl/TiAl at 1473 K and subsequent brazing of the TiAl side to Al at 853 K. During sintering, the chemical reaction of Ti+TiAl→AlTi2 occurred within not only the mixed layer of Ti+TiAl but also the adjacent Ti layer and TiAl layer. As a consequence, finer graded microstructures were formed within the sintered body. The density of the Ti/TiAl/Al graded material changes quasi-continuously from 4.52 g/cm3 to 2.70 g/cm3 in its thickness direction.
引用
收藏
页码：989 / 993
页数：5
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