During squeeze casting, two methods are used to restrict interfacial reaction. Firstly, preoxidation of SiC particles takes place at 1 000 °C. The extent of reaction is suppressed slightly, but the TC remains as low as 40–70 W/(m·K) [14]. Secondly, with the addition of Si, the TC is very low due to considerable reduction of the TC of copper. It is still a great challenge in SiC-Cu system to enhance TC during liquid infiltration route.