In-situ TiC reinforced Al-4Cu matrix composite: Processing, microstructure and mechanical properties
Materials Science and Engineering A
School of Engineering
National Natural Science Foundation of China Jiangsu province Science and Technology Plan Project, China
© 2020 Al-4Cu alloy matrix composites reinforced in-situ by TiC particulates were prepared by microwave heating (MH) and conventional heating (CH). The samples were heated up to 1273 K in vacuum induction melting furnace and vacuum microwave heating furnace, respectively. The thermodynamics and dynamics associated with the two systems were discussed and the activation energy related to two heating methods was also calculated. The influence of microwave heating on chemical reaction was analyzed. The results showed that Al reacted with Ti to form TiAl3 and carbon atom then displaced Al in TiAl3 to form TiC. The activation energy of TiC reaction generated by MH and CH were 41.4 kJ/mol and 270.0 kJ/mol, respectively. The ultimate tensile strength increased with the increase of TiC volume fraction. In addition, the ultimate tensile strength of the composite prepared by MH was higher than that of the sample prepared by CH.