Effect of carbon content on microstructure of
in-situ Al2O3pTiCp/Al composites
in-situ Al2O3pTiCp/Al composites
(Department of Materials Science and Engineering,
Gansu University of Technology, Lanzhou 730050, P.R.China)
Gansu University of Technology, Lanzhou 730050, P.R.China)
Abstract: The in-situ Al2O3p-TiCp/Al composite was fabricated by XD (exothermic dispersion) process in TiO2-Al-C system, and the effect of carbon content on the microstructure of the fabricated composite and the reactive temperature characteristics had been studied. The results show that carbon content affects the microstructure and reactive temperature of Al2O3p-TiCp/Al composite greatly. The quantity of TiC phases in the fabricated composites increases, while the Al3Ti phases reduces with increasing carbon content. And when C/TiO2 molecular ratio is equal to one, the Al3Ti phase nearly disappears. High temperature metallurgical field caused by strong exothermic reaction influences the synthetic reaction greatly, and higher synthetic temperature was favorable to the synthesis of Al2O3p-TiCp reinforce particles.
Key words: XD technique; carbon content; in-situ Al matrix composites