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http://dx.doi.org/10.9725/kts.2022.38.5.222

Evaluation of Friction and Wear Characteristics of Carbon-based Solid Lubricant Films for Surface Application of Compressor Parts  

Lee, Sung-Jun (Graduate School, Dept. of Mechanical Engineering, Chosun University)
Kim, Chang-Lae (Dept. of Mechanical Engineering, Chosun University)
Publication Information
Tribology and Lubricants / v.38, no.5, 2022 , pp. 222-226 More about this Journal
Abstract
Between diaphragms made of stainless steel (SUS), which is the main component of a hydrogen gas compressor, micro-slip occurs owing to repeated bending, resulting in scratches on the surface. The surface scratch of the compressor part is a problem with airtightness, which reduces the efficiency of the compressor; in severe cases, damage is a possibility. In this study, the changes in friction and wear characteristics due to the surface polishing of SUS and carbon-based solid lubricant films (graphene and CNT) were analyzed. Bare SUS, polished SUS, graphene film, and CNT film specimens were prepared. The surface roughness of the SUS was significantly reduced by surface polishing but increased by carbon-based solid lubricating films. In contrast, the friction coefficient maintained a similar value after surface polishing but was significantly reduced by the carbon-based solid lubricant films. In particular, the graphene film exhibited the lowest initial friction coefficient, while the CNT film exhibited the lowest overall average friction coefficient. Regarding the wear rate, polished SUS exhibited the lowest value, but the surface condition of the wear track showed that the carbon-based solid lubricating films were relatively less damaged. Although the wear rate measured was largely attributed to the solid lubricating film peeling off, the SUS surface under the film was considered protected.
Keywords
Carbon nanotube; Friction/wear; Graphene; Solid lubricant; Surface polishing;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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