现代技术陶瓷2025，Vol.46Issue(6)：594-605,12.DOI:10.16253/j.cnki.37-1226/tq.2025.06.006
固体润滑剂对氧化铝陶瓷力学性能的影响规律研究
The Influence of Solid Lubricant Addition on the Mechanical Properties of Alumina Ceramic Materials
摘要
Abstract
Aluminum oxide(Al2O3),as a high-performance structural ceramic material with high melting point,high toughness,good chemical stability,and excellent wear resistance,is one of the best candidate materials for high-temperature wear resistant components.It has been widely used in aerospace materials,military industry,and biomedical fields.However,most ceramic materials do not have lubrication functions,especially under dry friction and high temperature conditions,where the friction coefficient and wear rate are relatively high.Therefore,the main strategy for preparing ceramic lubricating composite materials is to introduce single or complex solid lubricating components into the ceramic matrix,in order to form a lubricating film or transfer film during the friction process to achieve anti friction and anti-wear effects.Meanwhile,the inherent brittleness and high wear performance of Al2O3 ceramic materials greatly limit their applications in related fields.Therefore,how to improve the mechanical properties of Al2O3 ceramics is crucial for their application.In order to clarify the influence of different lubricating phases on the composition,microstructure,and mechanical properties of AlO3 ceramics,three different lubricants,graphite,Mo,and LaF3,were selected to be added to the Al2O3 ceramic lubricating material matrix.A series of Al2O3 ceramic lubricating materials were prepared by hot pressing sintering method.Then,the properties of the material were studied using X-ray diffraction(XRD),scanning electron microscopy(SEM),BET,and three-point bending methods,and the influence of lubricant type and content on the microstructure and mechanical properties of Al2O3 was analyzed.The results indicate that the type and content of lubricants have a significant impact on the microstructure and mechanical properties of the material.As the content of non-metallic lubricating phases increases,the hardness,bending strength,and fracture toughness of the composite material decrease significantly.Adding Mo can significantly improve the strength and toughness of composite materials,mainly because Mo not only makes Al2O3 denser,but also plays a role in ductile phase toughening.关键词
氧化铝/陶瓷复合材料/力学性能/孔径分布Key words
alumina/ceramic matrix composite/mechanical properties/pore-size distribution分类
化学化工引用本文复制引用
吴正江,魏万鑫,闫伟,苏云峰,樊恒中,张永胜,宋俊杰..固体润滑剂对氧化铝陶瓷力学性能的影响规律研究[J].现代技术陶瓷,2025,46(6):594-605,12.基金项目
国家自然科学基金项目(52375216,52303386) （52375216,52303386）
甘肃省科技计划(23ZDKA0001). （23ZDKA0001）
