制备了轴承内圆精密磨削用陶瓷基立方氮化硼(cBN)复合材料.利用扫描电子显微镜和电子探针研究了复合材料的微观组织结构、界面成分分布，并用轴承内圆磨床测试了磨削性能.结果表明：随着烧结温度升高，复合材料界面成分扩散深度缓慢增加，烧结温度从700℃升高到800℃，扩散层厚度从大约3μm增加到6μm左右；界面强度增加速度大于陶瓷基体材料强度增加速度；当烧结温度为750℃时，复合材料界面结合强度与陶瓷基体材料强度相匹配，磨削时复合材料进给量达到8μm/转，磨耗体积比达到310~370，具有良好的锋利度和耐磨性能，磨削后的复合材料能观察到cBN磨损、破裂、脱落和陶瓷基材桥断裂的痕迹.

A kind of ceramic matrix cubic boron nitride (cBN) composites for bearing interfacial precision grinding was prepared by sintering process. The microstructure and element distribution at the interfaces were studied by scanning electron microscope and electron probe analysis. The grinding properties were tested by bearing interfacial grinder. The results show that with the increase of sintering temperature, the composition diffusion depth at the interfaces increases slowly, and the interfacial binding strength increases more rapidly than the strength of ceramic matrix. At the sintering temperature of 750 ℃, interfacial binding strength of composites matches well with the matrix strength. With the feed rate is 8 μm/r and the abrasion volume ratio is 310-370, the ceramic matrix cBN composites show good grinding performance with high sharpness and wear resistance. The wear, rupture, exfoliation of cBN and the fracture of ceramic matrix material were observed after grinding.