Size Effect of CeO2 Particle on Nanoscale Single-Asperity Sliding Friction

Size Effect of CeO2 Particle on Nanoscale Single-Asperity Sliding Friction
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CeO2颗粒对纳米级单凹凸滑动摩擦的尺寸效应

DOI:
10.1007/s11249-021-01544-5
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发表时间:
2021-08
期刊:
影响因子:
3.2
通讯作者:
Zhiwei Shan
Zhiwei Shan
中科院分区:
工程技术2区
文献类型:
--
作者:
Ning Xu;Jiahui Ma;Qi Liu;Weizhong Han;Zhiwei Shan

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在超精密抛光过程中,磨料颗粒的大小对磨料的基本摩擦行为和力学性能有很大影响。本文研究了CeO2单粒磨料的摩擦学性能和力学性能的尺寸效应。实验结果表明,尺寸效应对单粗度滑动摩擦各工况的摩擦系数都有影响,尤其是犁耕和切削工况。随着CeO2尖端半径的增大,残余划痕深度和COF均减小。这些结果与CeO2纳米颗粒的力学性能有关。研究发现,有效模量随磨料尺寸的减小而增大,这与单磨粒滑动摩擦实验的尺寸效应相对应。
The size of abrasive particle has a great impact on the fundamental friction behavior and mechanical properties of the abrasive during ultra-precision polishing performance. Here, the size effect of the tribological behavior and mechanical properties of CeO2 single abrasive were studied. Experimental results show that the size effect plays a role on coefficient of friction (COF) of each regime in single-asperity sliding friction, especially in ploughing and cutting regimes. The residual depth of the scratch and COF both decrease with the increase of the CeO2 tip radius. These results relate to the mechanical properties of CeO2 nanoparticles. We found that the effective modulus increases with the decrease of abrasive size, which corresponds to the size effect of the single-asperity sliding friction experiment.
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