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In order to reduce the sintering temperature and improve the mechanical properties of B4C ceramics, ZrB2 was formed in situ using the SPS sintering method with ZrO2 and B4C as raw materials. Thermodynamic calculations revealed that CO pressure affected the formation of ZrB2 at temperatures from 814 °C to 1100 °C. The experimental results showed that the ZrB2 grain size was

In order to reduce the sintering temperature and improve the mechanical properties of B

In order to improve the mechanical properties of B4C ceramics, B4C@TiB2 composite powders with core-shell structure are prepared by molten salt method using B4C and Ti powders as raw materials. And B4C ceramics were prepared from B4C@TiB2 composite powders by spark plasma sintering (SPS). The results show that the B4C@TiB2 composite powders exhibit intact core-shell structure. The B4C@TiB2 composite powders improves the mass transfer during spark plasma sintering. When the molar ratio of B4C/Ti is 2/1, the relative density, Vickers hardness, fracture toughness and flexural strength of the BT1/2 sample are 94.2%, 26.9 GPa, 5.34 MPa·m1/2 and 570 MPa, respectively, which is best comprehensive properties.