纳米二氧化铈与蛇纹石混合物作为润滑油添加剂的摩擦学性能研究
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摘要
采用表面活性剂将蛇纹石、纳米二氧化铈以及他们的混合物稳定分散于PAO4基础油中,利用摩擦磨损试验机分别考察蛇纹石、纳米二氧化铈以及蛇纹石与二氧化铈混合物作为润滑油添加剂的摩擦学性能,借助金相显微镜观察磨损表面形貌并测量磨斑直径,并采用能量色散谱仪(EDS)分析磨损表面的元素组成。结果表明:蛇纹石、纳米CeO_2和蛇纹石/CeO_2复合颗粒都可以显著改善润滑油的减摩抗磨性能,而添加蛇纹石/CeO_2复合添加剂的润滑油的摩擦学性能更佳,其中添加质量分数0.25%纳米二氧化铈与0.25%蛇纹石混合物的润滑油的摩擦学性能最佳。蛇纹石/CeO_2复合颗粒优异的摩擦学性能归因于其在磨损表面形成了吸附膜和Fe_2O_3、SiO_2化学反应膜,其中Ce元素可能起到了催化剂的作用。
Serpentine,nano CeO_2 and their mixture were stably dispersed in PAO4 base oil by surfactant,and their tribological properties as lubricating oil additives were studied by friction and wear tester.The morphology of the worn surface was observed by means of a metallographic microscope and the wear scar diameter was measured.The elemental composition of the worn surface was analyzed by using energy dispersion spectrometer(EDS).The results show that serpentine,nano CeO_2 and the composite additives of serpentine/CeO_2 can significantly improve the friction reducing and antiwear properties of lubricating oils.The lubricating oil with the composite additives of serpentine/CeO_2 has better tribological properties than the base oil with single additive of serpentine and nano CeO_2,and the best tribological properties are obtained when the composite additives of 0.25% ceria and 0.25% serpentine was added.The excellent tribological properties of serpentine/CeO_2 composite additives are attributed to the deposited film formed on the worn surface.The deposited film is mainly composed of the adsorption film of serpentine/CeO_2 composite particles and the chemical reaction film of Fe_2O_3 and SiO_2,and the Ce element may act as a catalyst.
Serpentine,nano CeO_2 and their mixture were stably dispersed in PAO4 base oil by surfactant,and their tribological properties as lubricating oil additives were studied by friction and wear tester.The morphology of the worn surface was observed by means of a metallographic microscope and the wear scar diameter was measured.The elemental composition of the worn surface was analyzed by using energy dispersion spectrometer(EDS).The results show that serpentine,nano CeO_2 and the composite additives of serpentine/CeO_2 can significantly improve the friction reducing and antiwear properties of lubricating oils.The lubricating oil with the composite additives of serpentine/CeO_2 has better tribological properties than the base oil with single additive of serpentine and nano CeO_2,and the best tribological properties are obtained when the composite additives of 0.25% ceria and 0.25% serpentine was added.The excellent tribological properties of serpentine/CeO_2 composite additives are attributed to the deposited film formed on the worn surface.The deposited film is mainly composed of the adsorption film of serpentine/CeO_2 composite particles and the chemical reaction film of Fe_2O_3 and SiO_2,and the Ce element may act as a catalyst.
引文
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[2]张嗣伟.我国摩擦学工业应用的节约潜力巨大:谈我国摩擦学工业应用现状的调查[J].中国表面工程,2008,21(2):50-52.ZHANG S W.Enormous economy potential of tribology application in industry in China:on the survey of present status of tribology application in industry[J].China Surface Engineering,2008,21(2):50-52.
[3]张祥,朱新河,冯晓辉,等.基于纳米氟化镧添加剂的润滑油摩擦学性能[J].大连海事大学学报,2017,43(1):126-130.ZHANG X,ZHU X H,FENG X H,et al.Tribological properties of lube added with lanthanum fluoride nanoparticles[J].Journal of Dalian Maritime University,2017,43(1):126-130.
[4]刘晴.含层状硅酸盐磨损自修复剂的减磨性能研究[D].北京:北京交通大学,2011.
[5]夏延秋,丁津原,马先贵,等.纳米级金属粉改善润滑油的摩擦磨损性能试验研究[J].润滑油,1998,13(6):39-42.XIA Y Q,DING J Y,MA X G,et al.Research on the improving friction properties of lubricating oil with nano metal powder[J].Lubricating Oil,1998,13(6):39-42.
[6]LIU W,CHEN S.An investigation of the tribological behaviour of surface-modified Zn S nanoparticles in liquid paraffin[J].Wear,2000,238(2):120-124.
[7]杨宏伟,李召良,费逸伟,等.硅酸镁和滑石粉的抗磨自修复机理[J].合成润滑材料,2006,33(4):1-3.YANG H W,LI Z L,FEI Y W,et al.Anti-wear self-repair mechanism of magnesium silicate and talcum powder[J].Synthetic lubricants,2006,33(4):1-3.
[8]曹敬煜,李文善,黄德欢.纳米铜在润滑油基础油中的制备及性能表征[J].材料科学与工程学报,2010,8(1):97-101.CAO J Y,LI W S,HUANG D H.Preparation and characterization of nanocopper particles in basic-lubricating oil[J].Journal of Materials Science and Engineering,2010,8(1):97-101.
[9]QI X,JIA Z,YANG Y,et al.Characterization and auto-restoration mechanism of nanoscale serpentine powder as lubricating oil additive under high temperature[J].Tribology International,2011,44(7):805-810.
[10]何强,叶军,牛青坡,等.纳米粒子作为润滑油脂添加剂的研究进展[J].徐州工程学院学报(自然科学版),2011,26(3):39-43.HE Q,YE J,NIU Q P,et al.The research of nano-particles as lubricant additives[J].Journal of Xuzhou Institute of Technology(Natural Sciences Edition),2011,26(3):39-43.
[11]ELIK O N,AY N,GNCY.Effect of nano hexagonal boron nitride lubricant additives on the friction and wear properties of AISI 4140 Steel[J].Particulate Science&Technology,2013,31(5):501-506.
[12]郭志光,顾卡丽,徐建生,等.有机钼及其复合纳米润滑添加剂的摩擦磨损性能研究[J].摩擦学学报,2005,25(4):317-321.GUO Z G,GU K L,XU J S,et al.Friction and wear behavior of organic molybdenum and its composite with nano-particle antiwear additive[J].Tribology,2005,25(4):317-321.
[13]刘家浚,郭凤炜.一种摩擦表面自修复技术的应用效果及分析[J].中国表面工程,2004,17(3):42-45.LIU J J,GUO F W.The application and analysis of a new selfrepairing technology on the frictional surface[J].China Surface Engineering,2004,17(3):42-45.
[14]刘旭辉,杨光,郭甜甜,等.纳米铁粉Fe3O4含量对磁流变液正应力特性的影响[J].机床与液压,2018,46(7):23-25.LIU X H,YANG G,GUO T T,et al.Effect of Fe3O4nanoparticles content on normal stress characteristics of magnetorheological fluid[J].Machine Tool&Hydraulics,2018,46(7):23-25.
[15]曹娟,张振忠,赵芳霞.超细蛇纹石粉体改善润滑油摩擦磨损性能的研究[J].润滑与密封,2007,32(12):53-55.CAO J,ZHANG Z Z,ZHAO F X.Study on tribological properties of the lubricating oil added with ultra-fine serpentine powders[J].Lubrication Engineering,2007,32(12):53-55.
[16]张宇,严志军,严志宇,等.天然和人工合成蛇纹石作为纳米润滑油添加剂的摩擦学性能比较[J].润滑与密封,2018,43(1):40-44.ZHANG Y,YAN Z J,YAN Z Y,et al.Comparison of tribological properties of natural serpentine and synthetic chrysotile as additives in lubricating oil[J].Lubrication Engineering,2018,43(1):40-44.
[17]顾卓明,顾彩香.纳米二氧化铈润滑油添加剂的摩擦学特性[J].润滑与密封,2007,32(11):91-94.GU Z M,GU C X.Tribological performances of CeO2nanoparticles used as lubricating oil additives[J].Lubrication Engineering,2007,32(11):91-94.
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[19]许一,张保森,徐滨士,等.镧/蛇纹石复合润滑材料的热力学及摩擦学性能[J].粉末冶金材料科学与工程,2011,16(3):349-354.XU Y,ZHANG B S,XU B S,et al.Thermodynamic characteristics and tribological properties of lanthanum/serpentine composite lubricating material[J].Powder Metallurgy Materials Science and Engineering,2011,16(3):349-354.