Fabrication of Ti-Al complex with superior deformation capability by pressure infiltration
来源期刊：中国有色金属学报(英文版)2011年第z2期
论文作者：LIANG Ce LI Feng GENG Lin HUANG Lu-jun
文章页码：358 - 361
Key words：pressure infiltration; Ti-Al complex; Al-Si eutectic alloy; microstructure
Abstract: Ti-Al complex with a network microstructure was successfully fabricated by pressure infiltration. The fabricated Ti-Al complex was investigated and analyzed by OM, XRD, SEM and EDS. The temperature of pressure infiltration was reduced by using Al-Si eutectic alloy instead of pure Al, which can effectively decrease non-diffusion reaction between liquid Al and solid Ti particles. The reaction thickness can be controlled at about 3 μm. The primary reaction product is TiAl3 intermetallics. As Ti atoms dissolve into the Al-Si liquid phase and Si atoms enrich on the surface of Ti particles, TiSi2Al is formed in Al phase of Ti-Al complex and outside the surface of Ti-Al reaction layer. The microstructure of the as-extruded Ti-Al complex indicates that the prepared Ti-Al complex possesses a superior deformation capability.
LIANG Ce, LI Feng, GENG Lin, HUANG Lu-jun
(School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China)
Abstract:Ti-Al complex with a network microstructure was successfully fabricated by pressure infiltration. The fabricated Ti-Al complex was investigated and analyzed by OM, XRD, SEM and EDS. The temperature of pressure infiltration was reduced by using Al-Si eutectic alloy instead of pure Al, which can effectively decrease non-diffusion reaction between liquid Al and solid Ti particles. The reaction thickness can be controlled at about 3 μm. The primary reaction product is TiAl3 intermetallics. As Ti atoms dissolve into the Al-Si liquid phase and Si atoms enrich on the surface of Ti particles, TiSi2Al is formed in Al phase of Ti-Al complex and outside the surface of Ti-Al reaction layer. The microstructure of the as-extruded Ti-Al complex indicates that the prepared Ti-Al complex possesses a superior deformation capability.
Key words:pressure infiltration; Ti-Al complex; Al-Si eutectic alloy; microstructure
