摘要
为改善环氧树脂(EP)的摩擦学性能,将氮掺杂的石墨烯量子点(N-GQDs)和Al2O3纳米颗粒(Nano-Al2O3)杂化物添加到环氧树脂中制备EP纳米复合材料。利用MRH-1A摩擦试验机考察纳米复合材料在PAO油润滑条件下的摩擦磨损性能,结合磨损表面的形貌及摩擦化学分析,研究界面转移膜的形成机理和润滑效应。试验结果表明,3N-GQDs-1Nano-Al_(2)O_(3)/EP纳米复合材料获得了最好的摩擦学性能,其最低摩擦因数和磨损率分别为0.08和7.4×10^(-5) mm^(3)/Nm。同时对偶金属表面上能够观察到一层均匀的转移膜,其中C、N、O元素主要分布于沟壑,而N、Al元素则集中于高台区域。机理分析表明,N-GQDs和Nano-Al_(2)O_(3)有效促进了转移膜的生成,从而避免了摩擦界面的直接接触。
Nitrogen-doped graphene quantum dots and Al_(2)O_(3) nanoparticles hybrids were added to epoxy resin to prepare high tribological performance EP nanocomposites.Tribometer with Plate-on-Ring mode was used to investigate the tribological properties of the nanocomposite under PAO lubrication condition.The morphology and tribochemistry of worn surface were analyzed,the mechanisms governing the formation and anti-friction performance of the tribofilm were explored.The results showed that the lowest friction coefficient and wear rate of 0.08 and 7.4×10^(-5) mm^(3)/Nm are obtained when 3N-GQDs-1Nano-Al_(2)O_(3)/EP rubbed with the steel counterpart.A continuous and thin tribo-film is distributed on the the steel countersurface,in which the C,N and O elements are mainly distributed in the gully,while the N and Al elements are concentrated in the plateau area.It is demonstrated that a tribofilm promoted by N-GQDs and Al_(2)O_(3) effectively avoided direct contact of friction pair.
作者
王壮
张建军
梁森
郭峰
郑少梅
车清论
WANG Zhuang;ZHANG Jianjun;LIANG Sen;GUO Feng;ZHENG Shaomei;CHE Qinglun(School of Automotive and Mechanical Engineering,Qingdao University of Technology,Qingdao 266525,China)
出处
《中国表面工程》
EI
CAS
CSCD
北大核心
2021年第5期17-24,共8页
China Surface Engineering
基金
山东省重点研发计划(2019GSF109094)
山东省自然科学面上基金(ZR2020ME135)资助项目。
