Effect of Ion-Plasma Surface Treatment on Tribological Characteristics of Polyurethane

IF 0.5 4区工程技术 Q4 ENGINEERING, MECHANICAL Journal of Friction and Wear Pub Date : 2023-12-07 DOI:10.3103/s1068366623040098

I. V. Shkalei, E. V. Torskaya

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Abstract—

The aim of this study is an experimental-based analysis of the effect of surface treatment, leading to the formation of carbonized layers, on the coefficient of sliding friction of two polyurethane materials that differ in mechanical and rheological properties. The properties were determined by the results of indentation on a NanoScan-4D scanning nanohardness tester. A ceramic ball with a diameter of 2.1 mm was used as an indenter, which was pressed into the samples at a given linear velocity. The indentation curves at low and high indentation velocities were used to calculate the longitudinal and instantaneous reduced modulus of elasticity. It was found that the longitudinal elastic moduli differ by more than seven times, and the rheological properties of a more rigid material are weak. Tribological tests were performed on a UMT-3 friction machine in the mode of unidirectional sliding friction at a constant load and velocity. Based on the data, regression equations were calculated and the dependences of the friction coefficient on the load and sliding velocity were obtained. The influence of the surface treatment fluence on the surface roughness, adhesion, and deformation friction force is analyzed, data are correlated with the known experimental and theoretical results. It is shown that surface treatment with a relatively small fluence gives fundamentally different effects for the two studied materials: a slight change in roughness and decrease of friction coefficient for the more rigid polyurethane; a significant increase in roughness and a consistently high coefficient of friction, which varies slightly in the considered ranges of loads and velocities. Thus, surface treatment can be used for controlling the coefficient of friction of polyurethane and ensuring its consistently high frictional properties.

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离子等离子体表面处理对聚氨酯摩擦学特性的影响

摘要--本研究的目的是通过实验分析表面处理（形成碳化层）对两种聚氨酯材料滑动摩擦系数的影响，这两种材料的机械性能和流变性能各不相同。这些特性是通过 NanoScan-4D 扫描纳米硬度计上的压痕结果确定的。使用直径为 2.1 毫米的陶瓷球作为压头，以一定的线速度压入样品。利用低速和高速压入时的压入曲线计算纵向弹性模量和瞬时弹性模量。结果发现，纵向弹性模量相差七倍多，刚性较强的材料流变特性较弱。在 UMT-3 摩擦机上进行了摩擦学测试，测试模式为恒定载荷和速度下的单向滑动摩擦。根据数据计算了回归方程，并得出了摩擦系数与载荷和滑动速度的关系。分析了表面处理通量对表面粗糙度、附着力和变形摩擦力的影响，并将数据与已知的实验和理论结果进行了关联。结果表明，用相对较小的通量进行表面处理对所研究的两种材料产生了根本不同的影响：硬度较高的聚氨酯材料的粗糙度略有变化，摩擦系数降低；而粗糙度显著增加，摩擦系数始终较高，在所考虑的载荷和速度范围内略有不同。因此，表面处理可用于控制聚氨酯的摩擦系数，并确保其具有稳定的高摩擦特性。

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来源期刊

Journal of Friction and Wear ENGINEERING, MECHANICAL-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

1.50

自引率

28.60%

发文量

审稿时长

6-12 weeks

期刊介绍： Journal of Friction and Wear is intended to bring together researchers and practitioners working in tribology. It provides novel information on science, practice, and technology of lubrication, wear prevention, and friction control. Papers cover tribological problems of physics, chemistry, materials science, and mechanical engineering, discussing issues from a fundamental or technological point of view.