纳米WS_2润滑油添加剂在直流磁场下的摩擦磨损特性
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摘要
在四球摩擦磨损实验机摩擦区域添加了直流磁场发生装置,研究了添加经修饰的纳米WS_2润滑油在直流磁场作用下的摩擦磨损性能,用扫描电镜(SEM)配合能谱仪(EDS)及X射线光电子能谱仪(XPS)对钢球磨斑区域表面形貌和典型元素的含量及化学状态进行了分析,并探讨了相关的摩擦学机理。实验结果表明:经修饰后的纳米WS_2在150SN基础油中稳定性良好,含纳米WS_2的润滑油体现出更好的润滑性能,在纳米WS_2含量相同时,直流磁场下的润滑油抗磨减摩效果更好。直流磁场对纳米WS_2有一定的聚集效应,并会提高摩擦化学反应发生的概率。
A DC magnetic field generator was assembled around the friction region in a four-ball tester. The tribological properties of 150SN base oil and lubricating oil containing modified nano-WS_2 under and without DC magnetic field were studied by modified tribo-tester. The morphology, the content and chemical species of typical elements on the worn surfaces lubricated with the tested oil were examined by SEM-EDS and XPS, and then the tribological mechanism was discussed. The results indicate that the modified nano-WS_2 has good stability in 150SN base oil. The lubricating oil containing nano-WS_2 exhibits better lubrication performance. In addition, when the nano-WS_2 content is the same, the anti-wear and friction reduction effect of the lubricating oil under DC magnetic field is better. The DC magnetic field had a certain aggregation effect on nano-WS_2 and could increase the possibility of tribochemical reaction.
A DC magnetic field generator was assembled around the friction region in a four-ball tester. The tribological properties of 150SN base oil and lubricating oil containing modified nano-WS_2 under and without DC magnetic field were studied by modified tribo-tester. The morphology, the content and chemical species of typical elements on the worn surfaces lubricated with the tested oil were examined by SEM-EDS and XPS, and then the tribological mechanism was discussed. The results indicate that the modified nano-WS_2 has good stability in 150SN base oil. The lubricating oil containing nano-WS_2 exhibits better lubrication performance. In addition, when the nano-WS_2 content is the same, the anti-wear and friction reduction effect of the lubricating oil under DC magnetic field is better. The DC magnetic field had a certain aggregation effect on nano-WS_2 and could increase the possibility of tribochemical reaction.
引文
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[30]Yang Z L,Gao D Q,Zhang J,et al.Realization of high Curie temperature ferromagnetism in atomically thin MoS2and WS2nanosheets with uniform and flower-like morphology[J].Nanoscale,2014,7(2):650-658.
[31]Li H P,Liu S,Huang S L,et al.Impurity-induced ferromagnetism and metallicity of WS2monolayer[J].Ceramics International,2015,42(2):2364-2369.
[2]Lin J Y,Zhang R X,Ye W Y,et al.Nano-WS2embedded PESmembrane with improved fouling and permselectivity[J].Journal of Colloid&Interface Science,2013,396(6):120-128.
[3]Duan J J,Chen S,Chambers B A,et al.3D WS2nanolayers@heteroatom‐doped graphene films as hydrogen evolution catalyst electrodes[J].Advanced Materials,2015,27(28):4234-4241.
[4]Zhou L Y,Yan S C,Pan L J,et al.A scalable sulfuration of WS2to improve cyclability and capability of lithium-ion batteries[J].Nano Research,2016,9(3):857-865.
[5]Ma T,Zhang T,Gao P G,et al.Synthesis and properties of ultrahigh molecular weight polyethylene/WS?nanoparticle fiber for bullet-proof materials[J].Chinese Science Bulletin,2013,58(8):945-948.
[6]Wu N,Hu N N,Zhou G B,et al.Tribological properties of lubricating oil with micro/nano-scale WS2particles[J].Journal of Experimental Nanoscience,2018,13(1):1-12.
[7]Zheng D,Wu Y P,Li Z Y,et al.Tribological properties of WS2/graphene nanocomposites as lubricating oil additives[J].RSCAdvances,2017,7(23):14060-14068.
[8]杨士钊,胡建强,谢凤,等.低纳米二硫化钨含量润滑油抗磨性能[J].石油学报:石油加工,2017,33(3):543-548.Yang S Z,Hu J Q,Xie F,et al.Anti-wear properties of low nanoWS2content lubricant[J].Acta Petrolei Sinica(Petroleum Processing Section),2017,33(3):543-548.
[9]李长生,于云,刘艳清,等.WS2纳米颗粒的合成及摩擦学性能研究[J].无机化学学报,2008,24(2):275-279.Li C S,Yu Y,Liu Y Q,et al.Synthesis and tribological properties of WS2nanoparticles[J].Chinese Journal of Inorganic Chemistry,2008,24(2):275-279.
[10]Maharaj D,Bhushan B.Effect of MoS2,and WS2,nanotubes on nanofriction and wear reduction in dry and liquid environments[J].Tribology Letters,2013,49(2):323-339.
[11]Ratoi M,Niste V B,Wslker J,et al.Mechanism of action of WS2,lubricant nanoadditives in high-pressure contacts[J].Tribology Letters,2013,52(1):81-91.
[12]Li S P,Deng J X,Yan G Y,et al.Microstructure,mechanical properties and tribological performance of TiSiN-WS2,hardlubricant coatings[J].Applied Surface Science,2014,309(4):209-217.
[13]Chen C B,Mao D H,Shi C,et al.Experimental study on the tribological characteristics of nanometer WS2lubricating oil additive based on engine oil[J].Advanced Materials Research,2011,328/329/330:203-208.
[14]Aldana P U,Dassenoy F,Vacher B,et al.WS2nanoparticles antiwear and friction reducing properties on rough surfaces in the presence of ZDDP additive[J].Tribology International,2016,102:213-221.
[15]Aldana P U,Vacher,Béatrice,Le Mogne T,et al.Action mechanism of WS2nanoparticles with ZDDP additive in boundary lubrication regime[J].Tribology Letters,2014,56(2):249-258.
[16]Muju M K,Radhakrishna A.Wear of non-magnetic materials in the presence of a magnetic field[J].Wear,1980,58(1):49-58.
[17]Senouci A,Zaidi H,Frene J,et al.Damage of surfaces in sliding electrical contact copper/steel[J].Applied Surface Science,1999,144/145(98):287-291.
[18]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,(12):102-109.Wei Y H,Zhang Z Y,Chen Y.Influence of magnetic field interfering on dry-sliding tribological characteristics of materials with different magnetic properties[J].Journal of Mechanical Engineering,2012,(12):102-109.
[19]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 M,Feng Y.Effect of electric current on the friction and wear behavior of carbon nanotubes-silver-graphite composite[J].Tribology,2005,25(4):328-332.
[20]Jiang Z Q,Fang J H,Chen B S,et al.Effect of magnetic field on tribological properties of lubricating oils with and without tricresyl phosphate[J].China Petroleum Processing&Petrochemical Technology,2016,18(3):119-124.
[21]Jiang Z Q,Fang J H,Chen B S,et al.Improvement of magnetic field on tribological properties of lubricating oils with zinc butyloctyl dithiophosphate[J].China Petroleum Processing&Petrochemical Technology,2016,18(4):92-98.
[22]石琛,毛大恒,毛向辉.纳米二硫化钨颗粒的分散稳定性[J].中南大学学报(自然科学版),2010,41(2):476-482.Shi C,Mao D H,Mao X H.Dispersion stability of nano-tungsten disulfide particulates[J].Journal of Central South University(Science and Technology),2010,41(2):476-482.
[23]陈汉林,陈国需,杜鹏飞,等.二硫化钨纳米粉体作为锂基润滑脂添加剂的摩擦学研究[J].摩擦学学报,2015,35(6):651-657.Chen H L,Chen G X,Du P F,et al.Tribology of nano-tungsten disulfide powder as an lubricating additive for lithium grease[J].Tribology,2015,35(6):651-657.
[24]Zhang R C,Qaio D,Liu X Q,et al.A facile and effective method to improve the dispersibility of WS2nanosheets in PAO8 for the tribological performances[J].Tribology International,2018,118:60-70.
[25]解挺,闫照明,杨婷婷,等.外加磁场对摩擦副摩擦学性能影响的研究进展[J].合肥工业大学学报(自然科学版),2012,35(12):1601-1604.Xie T,Yan Z M,Yang T T,et al.Study progress of the effect of external magnetic field on tribological properties of friction pair[J].Journal of Hefei University of Technology(Natural Science),2012,35(12):1601-1604.
[26]Wei Y H,Zhang Y Z,Chen Y,et al.Impact of material permeability on friction and wear properties under the interference of DC steady magnetic field[J].Tribology International,2013,57(4):162-169.
[27]Xie G X,Guo D,Luo J B.Lubrication under charged conditions[J].Tribology International,2015,84:22-35.
[28]杨钊龙.若干非铁磁材料的低维磁特性研究[D].兰州:兰州大学,2016.Yang Z L.Low-dimensional magnetic characteristics of several non-ferromagnetic materials[D].Lanzhou:Lanzhou University,2016.
[29]Huo N J,Li Y,Kang J,et al.Edge-states ferromagnetism of WS2nanosheets[J].Applied Physics Letters,2014,104(20):2831-2836.
[30]Yang Z L,Gao D Q,Zhang J,et al.Realization of high Curie temperature ferromagnetism in atomically thin MoS2and WS2nanosheets with uniform and flower-like morphology[J].Nanoscale,2014,7(2):650-658.
[31]Li H P,Liu S,Huang S L,et al.Impurity-induced ferromagnetism and metallicity of WS2monolayer[J].Ceramics International,2015,42(2):2364-2369.
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