Strong and weak interface synergistic enhance the mechanical and microwave absorption properties of alumina.

Multifaceted balance makes the design of ceramics difficult but is urgently needed. This work purposes to grow uniform edge-rich graphene (ERG) on alumina (AlO/ERG) in-situ, then constructs a discontinuous conductive, strengthening and toughening network of crosslinked ERG by mixing AlO/ERG with AlO and sintering. Under the guarantee of the tight-bound covalent interface, ERG and doping AlO strengthen and toughen the ceramic by synergistic effect of weak and strong interface.