The wettability is enhanced with increasing temperature due to the interfacial reaction, but the interfacial reaction greatly degrades the TC. In order to suppress above interfacial reaction, three approaches are explored. Firstly, the surface of carbon fiber is modified through passive oxidation and metallic coating (Ni, Cu, W and Mo) in order to improve the wettability or build up diffusion barrier. Electroless Ni-coating layer is found to be able to enhance the wettability and reduce the microsegregation. Secondly, Al matrix is alloyed with Si to reduce the tendency towards Al4C3 formation. Thirdly, carbon preform and Al melt are preheated separately during infiltration process in order to reduce the contact time and the reactivity.