Kim Jin Woo, Nam Jungsoo, Jeon Jaehun, Lee Sang Won
Department of Mechanical Engineering, Graduate School, Sungkyunkwan University, Suwon-si 16419, Korea.
Intelligent Manufacturing System R&D Department, Korea Institute of Industrial Technology, Cheonan-si 31056, Korea.
Materials (Basel). 2021 Feb 2;14(3):685. doi: 10.3390/ma14030685.
The objective of this study is to investigate the tribological behavior of graphene nanoplatelets (xGnPs) as nano-solid lubricants, and to evaluate their applicability to the micro-drilling of multi-directional carbon fiber-reinforced plastic (MD-CFRP). To verify the tribological effect of nano-solid lubricants, three kinds of xGnPs (xGnP C-750, xGnP M-5, and xGnP H-5), multiwall carbon nanotubes (MWCNTs), and hBN are compared by the ball-on-plate test. Of these, three xGnPs are selected as nano-solid lubricants to investigate the micro-drilling performance of MD-CFRP using nano-solid dry lubrication, and the experimental results demonstrate that all xGnPs can enhance lubrication action in terms of surface quality (delamination, uncut fiber, and inner surface) and tool wear. In particular, larger graphene nanoplatelets (xGnP M-5 and xGnP H-5) are superior to the smaller one (xGnP C-750) by guaranteeing enhanced sliding action between the tool grain and the CFRP composite.
本研究的目的是研究石墨烯纳米片(xGnPs)作为纳米固体润滑剂的摩擦学行为,并评估其在多向碳纤维增强塑料(MD-CFRP)微钻削中的适用性。为了验证纳米固体润滑剂的摩擦学效果,通过球盘试验比较了三种xGnPs(xGnP C-750、xGnP M-5和xGnP H-5)、多壁碳纳米管(MWCNTs)和hBN。其中,选择三种xGnPs作为纳米固体润滑剂,采用纳米固体干润滑研究MD-CFRP的微钻削性能,实验结果表明,所有xGnPs在表面质量(分层、未切割纤维和内表面)和刀具磨损方面都能增强润滑作用。特别是,较大的石墨烯纳米片(xGnP M-5和xGnP H-5)通过保证刀具颗粒与CFRP复合材料之间增强的滑动作用,优于较小的石墨烯纳米片(xGnP C-750)。