Abstract

The following carbon nanostructures (CNSs) are used: shungite nanocarbon (Sh), multilayered graphene oxide (GO), multiwalled carbon nanotubes (Taunit-M), and fullerene C60. Medical Vaseline (MV) free from any additives or thickeners is used as a lubricant base. Tribological tests are carried out using a 2070 SMT-1 friction machine at a load of 2000 N. The roughness parameters of steel rollers before and after the tests are studied by profilometry. Detailed characteristics of contacting surfaces before and after friction are obtained by scanning and transmission electron microscopy. The experimental data are analyzed using the Hertz and Johnson–Kendall–Roberts models. According to the data on efficiency coefficients k_ef, the studied dispersions are ranked as follows in the order of deterioration of antiwear properties: MV/GO (0.5 wt %), k_ef of 50% > MV/Taunit-M (1.5 wt %), k_ef of 40% > MV/C60 (0.5 wt %), k_ef of 15% > MV/Sh (0.5 wt %), k_ef of 5%, which is in agreement with the above-mentioned sequence of CNSs at low loads. The reason for the best and worst wear factors upon using CNSs in the dispersions under study and factors affecting the values of wear in the hard friction mode are considered. The results of the study can be a basis for the development of new plastic lubricating compositions with carbon nanostructure additives for use in heavily loaded friction units.

中文翻译：

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碳纳米结构的空间组织对硬摩擦模式下模型润滑系统抗磨特性的影响

摘要

使用以下碳纳米结构 (CNS)：次石墨纳米碳 (Sh)、多层氧化石墨烯 (GO)、多壁碳纳米管 (Taunit-M) 和富勒烯 C60。使用不含任何添加剂或增稠剂的医用凡士林（MV）作为润滑剂基料。使用2070 SMT-1摩擦机在2000 N的载荷下进行摩擦学试验。通过轮廓仪研究试验前后钢辊的粗糙度参数。通过扫描和透射电子显微镜获得摩擦前后接触表面的详细特征。使用 Hertz 和 Johnson-Kendall-Roberts 模型对实验数据进行分析。根据效率系数k _ef的数据，所研究的分散体按照抗磨性能恶化的顺序排列如下：MV/GO (0.5 wt %), k _ef of 50% > MV/Taunit-M (1.5 wt %), k _ef of 40% > MV /C60 (0.5 wt%), k _ef为 15% > MV/Sh (0.5 wt%), k _ef为 5%，这与上述 CNS 在低负载时的顺序一致。考虑了在所研究的分散体中使用 CNS 时最佳和最差磨损因素的原因以及影响硬摩擦模式下磨损值的因素。研究结果可以作为开发用于重载摩擦装置的具有碳纳米结构添加剂的新型塑料润滑组合物的基础。