摘要
以羰基铁粉为磁性颗粒,SiO2为触变剂,油酸、硬脂酸、月桂酸、二聚酸、聚丙烯酸分别作为表面活性剂,制备硅油基磁流变液;采用MMW-1P型多功能摩擦磨损试验机考察表面活性剂对磁流变液摩擦磨损性能的影响,采用扫描电子显微镜观察钢球磨痕表面形貌,分析硅油基磁流变液的摩擦机制。实验结果表明,羧酸基类表面活性剂的加入增加磁流变液的黏度,影响其摩擦学性能,但磁流变液的磨损机制仍为典型的三体磨粒磨损。研究的5种表面活性剂中,硬脂酸、月桂酸减摩抗磨效果较好。
A novel silicon oil-based magnetorheological fluids were prepared with carbonyl iron powder as magnetic par ticles, SiO2 as thixotropic agents, and stearic acid, lauric acid, dimer acid, polyaerylic acid as the surfaetants separatedly. The effect of surfactants on tribologieal properties of magnetorheological fluids was investigated by MMW-1P-utility trihometer, and the worn surface was observed by SEM to analyze the friction mechanism of silicon oilbased magnetorheological fluids.The results indicate that the carboxylic acidbased surfactants can enhance the viscosity of magnetorheological fluids and improve the tribological properties,however the wear mechanism of magnetorheologieal fluids is still the typical three body abrasive wear.Stearic acid and lauric acid are outstanding in tribological properties for the five kinds of surfactants.
出处
《润滑与密封》
CAS
CSCD
北大核心
2015年第5期26-30,共5页
Lubrication Engineering
基金
国家科技支撑计划项目(2012BAF06B04)
关键词
磁流变液
表面活性剂
摩擦磨损
磨损机制
magnetorheological fluid
surfactant
friction and wear
wear mechanism
