引用本文:王壮,张建军,梁森,郭峰,郑少梅,车清论.石墨烯量子点/纳米Al2O3协同生长润滑转移膜机制∗[J].中国表面工程,2021,34(5):17~24
WANG Zhuang,ZHANG Jianjun,LIANG Sen,GUO Feng,ZHENG Shaomei,CHE Qinglun.Synergistic of Graphene Quantum Dots/ nano-Al2O3 Growing Lubricous Tribofilm[J].China Surface Engineering,2021,34(5):17~24
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石墨烯量子点/纳米Al2O3协同生长润滑转移膜机制∗
王壮, 张建军, 梁森, 郭峰, 郑少梅, 车清论
青岛理工大学汽车与机械工程学院 青岛 266525
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-Al2O3 / 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 mm3 / 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-Al2O3 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。
关键词:  N-GQDs  Nano-Al2O3  EP 纳米复合材料  转移膜  摩擦学性能
DOI：10.11933/j.issn.1007-9289.20210419001
分类号:TH117
基金项目:山东省重点研发计划(2019GSF109094)和山东省自然科学面上基金(ZR2020ME135)资助项目
Synergistic of Graphene Quantum Dots/ nano-Al2O3 Growing Lubricous Tribofilm
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
Abstract:
Nitrogen-doped graphene quantum dots and Al2O3 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 mm3 / Nm are obtained when 3N-GQDs-1Nano-Al2O3 / 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 Al2O3 effectively avoided direct contact of friction pair.
Key words:  N-GQDs  Nano-Al2O3  nanocomposites  tribofilm  tribological performance
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