电磁效应对含SiO_2/SnO_2复合纳米粒子润滑油的摩擦自修复特性影响
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摘要
用四球机考察了添加SiO_2/SnO_2复合纳米粒子的润滑油在电磁场作用下的摩擦学和自修复性能,用扫描电子显微镜(SEM)和X射线光电子能谱仪(XPS)分析了磨斑表面形貌及其典型元素的化学状态,并对抗磨自修复机理进行了初步探讨。结果表明,在磁场作用下,含SiO_2/SnO_2复合纳米粒子的润滑油润滑下的摩擦副磨斑直径和摩擦系数均比无磁场时小,且自修复效果更加明显。这是由于磁场有利于SiO_2/SnO_2复合纳米添加剂在摩擦副表面沉积,沉积物在摩擦载荷和摩擦热作用下快速熔融铺展,形成具有良好抗磨减摩和修复性能的沉积物膜。
Electromagnetic effect generated by friction self generated potential was simulated by setting external magnetic field around the friction area of four ball tester,tribological properties and self repairing performances of lubricating oils containing SiO_2/SnO_2 composite nanoparticles in magnetic and non-magnetic field were evaluated.The wear scars' diameter were measured using an optical microscope,the morphologies and the chemical states of several typical elements on the worn surface of discs were examined by means of microscope(SEM)and X-ray photoelectron spectroscopy(XPS),and then the tribological mechanism was discussed.The results indicate that the wear scars' diameter and friction coefficient in magnetic field are smaller than that in non-magnetic field.The self repairing performances were more excellent than that in non-magnetic field.The reason is that magnetic field has positive effects on the deposition of SiO_2/SnO_2 composite nanoparticles on the friction metal surface,which contributes to the adsorption and deposition of the nanoparticles on the sliding surface and subsequent formation of a boundary lubricating layer with a small shearing strength.
Electromagnetic effect generated by friction self generated potential was simulated by setting external magnetic field around the friction area of four ball tester,tribological properties and self repairing performances of lubricating oils containing SiO_2/SnO_2 composite nanoparticles in magnetic and non-magnetic field were evaluated.The wear scars' diameter were measured using an optical microscope,the morphologies and the chemical states of several typical elements on the worn surface of discs were examined by means of microscope(SEM)and X-ray photoelectron spectroscopy(XPS),and then the tribological mechanism was discussed.The results indicate that the wear scars' diameter and friction coefficient in magnetic field are smaller than that in non-magnetic field.The self repairing performances were more excellent than that in non-magnetic field.The reason is that magnetic field has positive effects on the deposition of SiO_2/SnO_2 composite nanoparticles on the friction metal surface,which contributes to the adsorption and deposition of the nanoparticles on the sliding surface and subsequent formation of a boundary lubricating layer with a small shearing strength.
引文
[1]MUJU M K,RADHAKRISHNA A.Wear of Nonmagnetic materials in the presence of a magnetic field[J].Wear,1980,58(1):49-58.
[2]董祥林,陈金荣,简小刚.磁场对金属摩擦磨损影响的研究及展望[J].材料科学与工程,2000,18(1):116-120.(DONG Xianglin,CHEN Jinrong,JIANXiaogang.Research situation and prospects for effect of a magnetic field on friction and wear of metals[J].Materials Science and Engineering,2000,18(1):116-120.)
[3]魏永辉,张永振,陈跃.直流稳恒磁场下高速钢/45#钢环干滑动摩擦磨损特性研究[J].摩擦学学报,2010,30(4):399-403.(WEI Yonghui,ZHANG Yongzhen,CHEN Yue.Dry sliding friction and wear of high-speed steel/45steel tribo-pair in direct current steady magnetic field[J].Tribology,2010,30(4):399-403.)
[4]魏永辉,张永振,陈跃.磁场干涉对不同磁属性材料干摩擦学特性的影响[J].机械工程学报,2012,48(12):102-109.(WEI Yonghui,ZHANG Yongzhen,CHENYue.Influence of magnetic field interfering on drysliding tribological characteristics of materials with different magnetic properties[J].Journal of Mechanical Engineering,2012,48(12):102-109.)
[5]张敏,凤仪.电流对碳纳米管-银-石墨复合材料摩擦磨损性能的影响[J].摩擦学学报,2005,25(4):328-332.(ZHANG Min,FENG Yi.Effect of electric current on the friction and wear behavior of carbon nanotubes-silver-graphite composite[J].Tribology,2005,25(4):328-332.)
[6]胡波,孟永钢,温诗铸.电控摩擦离合器的初步实验研究[J].摩擦学学报,2004,24(1):46-49.(HU Bo,MENG Yonggang,WEN Shizhu.A preliminary experimental study on voltage-controlled friction clutch[J].Tribology,2004,24(1):46-49.)
[7]董凌.复合纳米添加剂的摩擦学及自修复性能研究[D].重庆:后勤工程学院,2005.
[8]王建棋,吴文辉.电子能谱学[M].北京:国防工业出版社,1992.
[2]董祥林,陈金荣,简小刚.磁场对金属摩擦磨损影响的研究及展望[J].材料科学与工程,2000,18(1):116-120.(DONG Xianglin,CHEN Jinrong,JIANXiaogang.Research situation and prospects for effect of a magnetic field on friction and wear of metals[J].Materials Science and Engineering,2000,18(1):116-120.)
[3]魏永辉,张永振,陈跃.直流稳恒磁场下高速钢/45#钢环干滑动摩擦磨损特性研究[J].摩擦学学报,2010,30(4):399-403.(WEI Yonghui,ZHANG Yongzhen,CHEN Yue.Dry sliding friction and wear of high-speed steel/45steel tribo-pair in direct current steady magnetic field[J].Tribology,2010,30(4):399-403.)
[4]魏永辉,张永振,陈跃.磁场干涉对不同磁属性材料干摩擦学特性的影响[J].机械工程学报,2012,48(12):102-109.(WEI Yonghui,ZHANG Yongzhen,CHENYue.Influence of magnetic field interfering on drysliding tribological characteristics of materials with different magnetic properties[J].Journal of Mechanical Engineering,2012,48(12):102-109.)
[5]张敏,凤仪.电流对碳纳米管-银-石墨复合材料摩擦磨损性能的影响[J].摩擦学学报,2005,25(4):328-332.(ZHANG Min,FENG Yi.Effect of electric current on the friction and wear behavior of carbon nanotubes-silver-graphite composite[J].Tribology,2005,25(4):328-332.)
[6]胡波,孟永钢,温诗铸.电控摩擦离合器的初步实验研究[J].摩擦学学报,2004,24(1):46-49.(HU Bo,MENG Yonggang,WEN Shizhu.A preliminary experimental study on voltage-controlled friction clutch[J].Tribology,2004,24(1):46-49.)
[7]董凌.复合纳米添加剂的摩擦学及自修复性能研究[D].重庆:后勤工程学院,2005.
[8]王建棋,吴文辉.电子能谱学[M].北京:国防工业出版社,1992.