Alumina with different amounts of Cubic boron nitride (cBN) was synthesized by a high-pressure sintering method. By adjusting the sintering temperature to a relatively low level, the undesirable reverse transformation from cBN to hBN was avoided, and almost entirely dense composites were obtained. The sintering behaviors, phase compositions, microstructures, and mechanical properties of Al₂O₃-cBN composites were investigated. The cBN phase significantly improved the modulus of elasticity and hardness, but the fracture toughness was only slightly increased. Vickers hardness of Al₂O₃–40 vol% cBN composites sintered at 850 °C showed a maximum value of 30 GPa. The Al₂O₃–30 vol% cBN composite sintered at 1250 °C had the highest fracture toughness of 5.7 MPa·m^1/2.

采用高压烧结法合成了不同含量立方氮化硼（cBN）的氧化铝。通过将烧结温度调整到相对较低的水平，避免了从 cBN 到 hBN 的不希望的反向转变，并且获得了几乎完全致密的复合材料。_{研究了Al 2} O ₃ -cBN复合材料的烧结行为、相组成、显微组织和力学性能。cBN相显着提高了弹性模量和硬度，但断裂韧性仅略有增加。在 850 °C 下烧结的 Al ₂ O ₃ –40 vol% cBN 复合材料的维氏硬度显示最大值为 30 GPa。铝₂ O ₃在1250 ℃烧结的–30 vol% cBN 复合材料的断裂韧性最高，为5.7 MPa·m ^1/2。