Microstructure and Formation Mechanism of Al Matrix Composite Reinforced with in-situ TiAl3 Intermetallic Particles

被引：0
|
作者：
Wang Hongtao [1 ,2 ]
Chen Xiao [1 ,2 ]
Bai Xiaobo [1 ,2 ]
Ji Gangchang [1 ]
Dong Zengxiang [2 ]
机构：
[1] Jiujiang Univ, Jiujiang 332005, Peoples R China
[2] Jiangxi Engn & Technol Res Ctr Mat Surface Remfg, Jiujiang 332005, Peoples R China
来源：
RARE METAL MATERIALS AND ENGINEERING | 2016年 / 45卷 / 04期
关键词：
in-situ; TiAl3; Al matrix composite; cold spraying; microstructure; annealing treatment; TI; TITANIUM; DIFFUSION; SYSTEM;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The Ti-80Al (wt%) composite was deposited by cold spraying of Ti/Al mixed powder and Al matrix composite reinforced with in-situ TiAl3 intertermtallic particles was prepared through annealing treatment of the above-mentioned cold-sprayed Ti/Al deposit. The microstructure of TiAl3/Al composite during annealing was investigated by SEM, EDS and XRD. The solid diffusion reaction between Ti and Al particles in the annealed Ti/Al deposit was studied and the formation mechanism of TiAl3 intermetallics was also investigated. Results show that the as-sprayed Ti/Al deposit exhibits dense microstructure and has the same phase constitutes as the feedstock powder. The solid diffusion reaction between Ti particles and Al particles occurs in a local area of Ti/Al deposit when annealing at 450 degrees C and consequently in-situ TiAl3 intermetallics are formed. With the annealing temperature increasing, the content of TiAl3 intermetallics continuously increases. After annealing at 600 degrees C, all Ti particles in the Ti/Al deposit completely transform into TiAl3 intermetallics; as a result, the Al matrix composite reinforced with in-situ TiAl3 intermetallics particles are obtained.
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页码：1081 / 1086
页数：6
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