关键词: 磁性膜/聚甲基丙烯酸甲酯双膜系/
磁场/
干摩擦/
硅油润滑
English Abstract
Tribological behavior of reciprocating motion between ferromagnetic films coated with polymethylmethacrylate films under magnetic field
Li Lü-Zhou1 2,Jiang Ji-Le1 3,
Wei Rong-Han4,
Li Jun-Peng4,
Tian Yu1,
Ding Jian-Ning2
1.State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China;
2.Micro/Nano Science and Technology Center, Jiangsu University, Zhenjiang 212013, China;
3.Division of Mechanics and Acoustics, National Institute of Metrology, China, Beijing 100029, China;
4.NanoEngineering and BioMedical Systems Lab, “National” Tsinghua University, Taiwan, China
Fund Project:Project supported by the National Natural Science Foundation of China (Grant No. 51175281) and the Autonomous Research Topic between Cross-strait Tsinghua University, China (Grant No. 20111081205).Received Date:24 May 2015
Accepted Date:22 September 2015
Published Online:05 January 2016
Abstract:Magnetic thin films are widely used in magnetic recording and magnetorheology, and also in magnetic lubrication such as ferromagnetic fluids. Polymethylmethacrylate (PMMA) is used as a coating material on the surface of the magnetic material in an electromagnetic system because of its good dielectric properties. In this study, the tribological behavior of reciprocating motion between ferromagnetic films coated with PMMA films under a magnetic field is evaluated. The system of ferromagnetic films coated with PMMA films based on glass is called ferromagnetic/PMMA double membrane in this paper. Two pieces of membranes in each tribological experiment are absolutely the same. Two kinds of experimental conditions, that is, under dry friction and silicone oil lubrication, are used to investigate the influences of load and magnetic field strength on the friction performance of ferromagnetic/PMMA double membranes. Experimental results show that the magnetic field directly affects the friction performance of a ferromagnetic /PMMA double-film system, and the performance changes with the normal load and intensity of the magnetic field. However, the influence of magnetic field on the tribological property in the dry friction mode is different from that in the silicone oil lubrication mode. The influences of magnetic force and the changes of the physical properties of the friction pair on friction and friction coefficient, which are both induced by the magnetic field, are analyzed. The theoretical analysis results are in good agreement with the experimental date. This work provides a basis for designing and controlling magnetic film interface media.
Keywords: ferromagnetic/polymethylmethacrylate double membrane/
magnetic field/
dry friction/
silicone oil lubrication
