Reaction Synthesis of TiAl-Al2O3 Composite
Titanium aluminide composite reinforced with submicron Al2O3 has been prepared by a reactive hot press method using TiO2, Al and Ti powder as source materials. The reaction synthesis processing is particularly investigated. Results show that the matrix of the as-prepared material is a mixture of TiAl and a small amount of Ti3Al. Fine Al2O3 particles that act as reinforcing phase are dispersed along the interface of the matrix. The reduction of TiO2 involves many transitional stages, including Ti-Al reaction, TiO2-Ti reducing reaction, reaction between TiO2 and Al, etc.
Wei Pan and Jianghong Gong
J. F. Zhu, J. Q. Gao, F. Wang, "Reaction Synthesis of TiAl-Al2O3 Composite", Key Engineering Materials, Vols. 336-338, pp. 1397-1399, 2007