Al₂O₃-cBN-hBN self-lubricating ceramics were synthesized by using a high-pressure sintering method. The mapping relationships between sintering thermodynamic conditions, component content, and mechanical properties were established using the response surface method. The main factors influencing the mechanical properties are clarified. The formation mechanism of the excellent mechanical properties is explained. It is found that the undesired phase transformation from cBN to soft hBN can be effectively inhibited by using a low-temperature and high-pressure sintering process. Sintering temperatures improve the relative densities and elastic modulus of self-lubricating ceramic but have little effect on the hardness and fracture toughness. cBN content is the main factor affecting the mechanical properties of the composites. The microcracks developed during the high-pressure sintering process contribute to the fracture toughness of the composites.

中文翻译：

---

Al2O3-cBN-hBN复合材料力学性能分析及主要影响因素识别

铝₂ O ₃采用高压烧结法合成了-cBN-hBN自润滑陶瓷。采用响应面法建立烧结热力学条件、组分含量和力学性能之间的映射关系。阐明了影响力学性能的主要因素。解释了优异力学性能的形成机理。发现通过使用低温和高压烧结工艺可以有效地抑制从cBN到软hBN的不希望的相变。烧结温度提高了自润滑陶瓷的相对密度和弹性模量，但对硬度和断裂韧性影响不大。cBN含量是影响复合材料力学性能的主要因素。