摘要
采用热压工艺制备了Al2O3/TiC/CaF2自润滑陶瓷材料,研究了其力学、摩擦学性能。结果表明:当CaF2含量为10%时,Al2O3/TiC/CaF2自润滑陶瓷材料的强度和硬度最高,分别达到了589 MPa和1 537 HV。Al2O3/TiC/CaF2自润滑陶瓷材料的晶粒大小均匀,基体组织成网状结构,有利于提高材料的强度。室温干摩擦条件下,当CaF2含量为10%时,摩擦因数最低,约为0.28左右;CaF2含量为15%的陶瓷反而具有较大的摩擦因数,达到了0.32左右。
An Al2O3/TiC/CaFz self-lubricating ceramic composite was prepared by means of hot-pressing. Mechanical properties and microstructure of the composite were analyzed. The Al2O3/TiC with 10% CaF2 had the highest hardness of 1 537 HV and bending strength of 589 MPa. The Al2O3/TiC with 10% CaF2 had the lowest friction coefficient, while the Al2O3/TiC with 15 % CaF2 had higher friction coefficient. A proper addition of CaF2 could decrease friction coefficient of the Al2O3/TiC/CaFz composite which showed some self-lubricating property. High CaF2 addition would increase the weakness and friction coefficient.
出处
《机械工程材料》
CAS
CSCD
北大核心
2005年第8期22-25,共4页
Materials For Mechanical Engineering
基金
国家自然科学基金资助项目(50275088)
山东省中青年科学家奖励基金资助项目(02BS064)
教育部优秀青年教师资助项目(2055)
关键词
自润滑
陶瓷材料
固体润滑
复合材料
self-lubrication
ceramic material
solid lubrication
composite
