High heat load properties of TiC dispersed Mo alloys

A high heat load experiment of TiC dispersed Mo alloys using electron beams was carried out to investigate fundamental properties of thermal process due to high heat load as high heat flux materials such as the divertor tiles. As a result, although characteristic damage and gas emission of the TiC dispersed Mo alloys around the melting point are inferior to the PM-Mo, but those of the Mo-0.5 wt%TiC and Mo-1.0 wt%TiC below a temperature of about 2000 °C were superior to polycrystalline Mo. Thus, their materials are expected to be suitable as high heat flux materials used below the recrystallization temperature. Results also indicate that it is necessary to release internal strain energy induced by the manufacturing process in order to decrease damage by grain growth and crack formation at high temperature, which was caused by migration of grain boundary and stress, respectively. Characterization of microstructure produced by the rolling process during manufacture is required to design improvement of the thermal conductivity.