B₄C-TiB₂ composite ceramic was prepared by reactive spark plasma sintering, using amorphous B, Ti, and graphite as the raw materials. The reaction process and the phase composition in the process of sintering were studied. The effects of the ratio of raw materials and sintering process on the microstructure and mechanical properties of B₄C-TiB₂ composite ceramic were investigated. The composition of the sintered sample was B₄C, TiB₂, and bits of residual unreacted graphite. B and Ti preferentially reacted to form TiB₂ at 800 °C, and then B and graphite reacted to form B₄C at 1250 °C. The 75 vol% B₄C-25 vol% TiB₂ composite ceramic synthesized with 60.6 wt% B, 25.8 wt% Ti, and 13.6 wt% graphite and sintered at 1900 °C for 15 min resulted in nearly full densification and optimal mechanical properties. The relative density, Vickers hardness, fracture toughness, and flexural strength were 98.6 ± 0.01%, 26.6 ± 0.01 GPa, 5.9 ± 0.13 MPa·m^1/2, and 605 MPa, respectively.

以无定形的B，Ti和石墨为原料，通过反应放电等离子体烧结制备了B ₄ C-TiB ₂复合陶瓷。研究了烧结过程中的反应过程和相组成。研究了原料配比和烧结工艺对B ₄ C-TiB ₂复合陶瓷显微组织和力学性能的影响。烧结样品的组成为B ₄ C，TiB ₂以及少量未反应的残留石墨。乙和Ti优先反应形成的TiB ₂在800℃下，然后B和石墨反应，形成乙₄下以1250℃。75体积％B ₄由60.6 wt％的B，25.8 wt％的Ti和13.6 wt％的石墨合成的C-25 vol％TiB ₂复合陶瓷在1900°C烧结15分钟，得到几乎完全的致密化和最佳的机械性能。相对密度，维氏硬度，断裂韧性和弯曲强度分别为98.6±0.01％，26.6±0.01GPa，5.9±0.13MPa·m ^1/2和605MPa。