中文摘要：

采用放电等离子烧结工艺，制备TiB2/ZrB2/SiC复合功能材料。用X射线衍射仪和场发射扫描电镜分析观察复合材料的物相组成及微观形貌。并测试复合材料的抗弯强度、断裂韧性及硬度。结果表明：两次球磨后的TiB2/ZrB2/SiC粉体粒度较小（2~4μm），且分布较均匀，几乎没有团聚现象。烧结后的复合功能材料中有（TixZry）B2固溶体相生成。当加入ZrB2的体积分数为30%时，生成的（TixZry）B2固溶体在复合材料中起到了很好的晶粒细化与界面融合作用，所以 TZS30复合陶瓷材料比 TZS0复合陶瓷材料的抗弯强度和断裂韧性分别提高了119.8%和98.9%。利用TiB2/ZrB2/SiC复合陶瓷材料在高温摩擦作用下与氧的化学反应，可以实现自润滑。

英文摘要：

TiB2/ZrB2/SiC functional composite materials were fabricated by the spark plasma sintering technology. Phase composition and microstructure of the composite were analyzed by XRD and SEM. The bend strength, fracture toughness and hardness were detected. The results show that the particle size of TiB2/ZrB2/SiC powder is 2~4 μm after double milling refinement, which makes the size and distribution uniform, and almost without reunion phenomenon. Moreover, the new phases of （TixZry） B2 solid solution are produced in the sintered functional composite. When the volume fraction of ZrB2 is 30%, the generated （TixZry） B2 solid solution plays a very important role in grain refinement and interface fusion. The bending strength and fracture toughness of TZS30 composite ceramic materials are much higher than TZS0, which are increased by 119.8% and 98.9%, respectively. Meanwhile, the self-lubricating of TiB2/ZrB2/SiC ceramic materials can be realized by the friction chemical reaction with oxygen under high-temperature.