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Monolithic Si3N4 ceramic,15wt%TiC reinforced Si3N4 composite(TiC/Si3N4),as well as 1wt%graphene platelets reinforced TiC/Si3N4 composite(GPLs/TiC/Si3N4)was prepared by hot pressing sintering process with Y2O3,Al2O3 and MgO as sintering aids.