▎ 摘　　要

NOVELTY - A graphene-doped zirconium diboride-silicon carbide composite ceramic comprises raw material of zirconium diboride-silicon carbide composite powder and graphene. The mass ratio of the composite powder with respect to the graphene is (4-16):1. USE - Graphene-doped zirconium diboride-silicon carbide composite ceramic used for automobile engine. ADVANTAGE - The graphene-doped zirconium diboride-silicon carbide composite ceramic has excellent toughness and conductivity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the graphene-doped zirconium diboride-silicon carbide composite ceramic.