CAJ | 학술논문

利用透射电子显微镜与电子衍射观察由二烷基二硫代磷酸原位修饰合成的铜纳米微粒的形貌和结构.在四球机上考察其作为基础润滑油添加剂的抗磨减摩性能,在环块机上考察其作为润滑油添加剂的自修复性能.结果表明,铜纳米添加剂具有良好的抗磨减摩和自修复性能.利用扫描电子显微镜观察滑块表面的磨痕形貌,利用电子天平对滑块自修复前后的质量进行称量比较,利用X射线光电子能谱仪对自修复膜表面的元素组成和化学价态进行分析,发现在300 N的负荷下,纳米铜的添加量为4%时修复效果最好,试块经4 h修复后滑块质量增加0.5 mg,磨斑直径和摩擦因数呈现明显下降的趋势.摩擦过程中铜纳米微粒在摩擦表面形成沉积膜,这种沉积膜与表面修饰层形成的摩擦化学反应膜产生协同作用,从而表现出优良的抗磨自修复性能.
이용투사전자현미경여전자연사관찰유이완기이류대린산원위수식합성적동납미미립적형모화결구.재사구궤상고찰기작위기출윤활유첨가제적항마감마성능,재배괴궤상고찰기작위윤활유첨가제적자수복성능.결과표명,동납미첨가제구유량호적항마감마화자수복성능.이용소묘전자현미경관찰활괴표면적마흔형모,이용전자천평대활괴자수복전후적질량진행칭량비교,이용X사선광전자능보의대자수복막표면적원소조성화화학개태진행분석,발현재300 N적부하하,납미동적첨가량위4%시수복효과최호,시괴경4 h수복후활괴질량증가0.5 mg,마반직경화마찰인수정현명현하강적추세.마찰과정중동납미미립재마찰표면형성침적막,저충침적막여표면수식층형성적마찰화학반응막산생협동작용,종이표현출우량적항마자수복성능.
Cu nanoparticles coated with dialkyl dithiophosphate (Cu-DDP) are synthesized in-situ by redox method. The size and structure of the nanoparticles are characterized by using transmission electronic microscopy (TEM) and electronic diffraction (ED) analysis. The anti-wear and friction-reducing and self-repairing behaviors of Cu-DDP as additive in base lubricating oil are investigated on both four-ball machine and MRH-3 stock-on-ring testing machine. Scanning electronic microscopy (SEM),X-ray photoelectron spectroscopy (XPS) and electronic balance (EB) are used to study the grinding crack topography,elemental composition and chemical valence,and the quality change of the self-repairing Cu film on the stock respectively. The test results show that at a load of 300 N a 4% additive amount of Cu nanoparticles exhibits the best self-repairing performance. The stock mass increases by 0.5 mg after 4-hour testing,and the wear scar diameter and friction coefficient are obviously decreased. The Cu nanoparticles is deposited on the frictional surface to form deposited film during the friction process,which could get synergetic effect with the friction chemical reaction film coated on the surface. As a result,the excellent anti-wear and self-repairing performances are obtained.