摘要
使用油酸对BN,TiN,BN/TiN纳米添加剂进行表面改性修饰,通过傅里叶红外光谱仪进行表征,利用四球摩擦磨损试验机考察润滑油纳米添加剂的摩擦学性能。结果表明:油酸成功枝接在纳米颗粒表面,提高其分散性能。与纯基础油相比,纳米添加剂工况摩擦因数降低11.7%,磨斑直径降低29.5%,磨斑表面未出现起皮脱落现象,沟槽深度、宽度明显降低,混合BN/TiN纳米添加剂表现出协同润滑作用。纳米BN,TiN颗粒能够进入摩擦副中,起到微轴承作用,降低摩擦磨损,进入摩擦副中的纳米BN与摩擦副基体材料发生化学反应,生成氮化硼、氧化硼、氧化铁等物质修复磨损表面。
BN,TiN and BN/TiN nano-additives were modified by oleic acid,characterized by Fourier transform infrared spectroscopy.The tribological properties of lubricating oil nano-additives were tested by four-ball friction and wear tester.The results show that oleic acid is grafted onto the surface of nanoparticles to improve their dispersibility.Compared with pure base oil,lubricating oil with nano-additives reduces friction coefficient by 11.7%and wear scar diameter by 29.5%,respectively.No peeling and falling off appears on the surface of wear scar,and the depth and width of groove are obviously reduced,compared with single nano-additive BN or TiN,BN/TiN displays synergistic lubrication when mixed nano-additive BN/TiN is used.The nano-BN and TiN particles can enter the friction pair,play the role of micro-bearing,reduce friction and wear.The nano-BN entering the friction pair and reacting with the matrix material of the friction pair can form boron nitride,boron oxide and iron oxide to repair the wear surface.
作者
孟凡善
李征
丁昊昊
王文健
刘启跃
MENG Fan-shan;LI Zheng;DING Hao-hao;WANG Wen-jian;LIU Qi-yue(School of Mechanical Engineering,Southwest Jiaotong University,Chengdu 610031,China;Department of Mechanical and Electrical Engineering,Qingdao University of Technology(Linyi),Linyi 273400,Shandong,China)
出处
《材料工程》
EI
CAS
CSCD
北大核心
2020年第5期160-167,共8页
Journal of Materials Engineering
基金
国家重点研发计划政府间国际科技创新合作重点专项(2018YFE0109400)
青岛理工大学(临沂)自然科学基金项目(2017ZR006)。
