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Tribological characterization of graphene nanoplatelets/alumina particles filled epoxy hybrid nanocomposites

机译:石墨烯纳米片/氧化铝颗粒填充环氧杂交纳米复合材料的摩擦学族表征

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In this work, graphene nanoplatelets have been synthesized using liquid phase exfoliation of graphite flake powder. The exfoliated graphene nanoplatelets were identified and characterized by using UV-Visible-NIR spectroscopy, High resolution transmission electron microscopy, electron diffraction, scanning electron microscopy and X-ray diffraction. The obtained graphene nanoplatelets and nano alumina at various weight ratios were dispersed in an epoxy matrix to enhance the surface roughness (R-a), micro hardness (H-v) and coefficient of friction (CoF) of epoxy hybrid nanocomposites. The results showed that the R-a and CoF value for the combined loading of 0.2 wt% of graphene nanoplatelets and 0.8 wt% of alumina into the epoxy was decreased to 41.02 and 20.01% whereas, the H-v value was increased to 10.04% when compared with the neat epoxy. The improved mechanical and tribological behaviors are suitable for the applications bearing and coating.
机译:在这项工作中,已经使用石墨片粉末的液相剥离合成了石墨烯纳米片。 通过使用UV可见光NIR光谱,高分辨率透射电子显微镜,电子衍射,扫描电子显微镜和X射线衍射来鉴定并表征剥落的石墨烯纳米孔。 将所得石墨烯纳米薄层和纳米氧化铝以各种重量比分散在环氧基质中,以增强环氧杂化纳米复合材料的表面粗糙度(R-A),微硬度(H-V)和摩擦系数(COF)。 结果表明,在环氧树脂中为0.2重量%的石墨烯纳米纳薄物和0.8重量%的氧化铝的RA和COF值降至41.02和20.01%,而与...相比,HV值增加到10.04%。 整齐的环氧树脂。 改进的机械和摩擦学行为适用于应用轴承和涂层。

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