Thermal shock resistances of high thermal conductivity C/C-composite as plasma facing materials for fusion reactor devices

The thermal shock resistances, mechanical and fracture mechanics properties of one directionally oriented carbon fiber reinforced carbon composite HUD-1S, which was recently developed as a plasma facing material for fusion reactor devices, are presented. These results are compared with the cases of a fine grain isotropic graphite PD-600S. HUD-1S has extremely high anisotropies, such as the thermal conductivity in the direction along the fiber orientation is extremely high in excess of the conductivity of copper or silver. But the conductivities of normal directions are below a half of the case of graphite. The characteristic isotropies on the thermal shock resistances and fracture toughnesses of this composite are given quantitatively. (author)