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By changing the mass fraction of Ni in the (Ti+B4C) reaction system, TiC-TiB2 composite ceramics with different Ni mass fraction were prepared by SHS centrifugal casting. TiC-TiB2 composite ceramics are composed of a lot of TiB2 platelets, irregular TiC grains and a few of intermittent net Ni alloy by XRD、FESEM and EDS. The results indicate that appropriate Ni addition promotes diffusion between groups and air flow in melting ceramics. The appropriate Ni addition results in the grain refinement and densification of the ceramics. When the mass fraction of Ni addition is 15%, the relative density of the ceramics is 96% and the fracture toughness is 13.6MPa·m .

The research of improvement on microstructure and properties of TiC-TiB2 composite ceramic prepared by SHS centrifugal casting