Superior lubrication of dense/porous-coupled nanoscale C/WS2 multilayer coating on ductile substrate
| Autor: | Mingyu Gao, Dae Eun Kim, Dong Gap Shin, Yuzhen Liu, Kyeong Hee Kang, Shusheng Xu |
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| Rok vydání: | 2019 |
| Předmět: |
Toughness
Materials science General Physics and Astronomy chemistry.chemical_element 02 engineering and technology Surfaces and Interfaces General Chemistry Substrate (printing) Tribology engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films chemistry Coating Lubrication engineering Lubricant Composite material 0210 nano-technology Porosity Carbon |
| Zdroj: | Applied Surface Science. 476:724-732 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2019.01.170 |
| Popis: | Sputtered carbon material has been receiving much attention as a solid lubricant coating owing to its high hardness and low coefficient of friction. However, its relatively low wear resistance performance when applied on a ductile substrate has limited its use in certain applications. In this work, a porous WS2 sublayer was introduced to the sputtered carbon-based nanoscale multilayer coating to improve its tribological properties. The microstructural, mechanical and tribological properties of the nanoscale C/WS2 multilayer coating were systematically investigated using various analytical techniques. Through structural optimization, a durable coating with excellent wear resistance and low frictional performances could be attained for a ductile steel substrate. The excellent toughness allowed the coating to deform with the ductile substrate without fracturing during contact sliding process. Furthermore, the first self-destruction and then recombination behaviors of dense/porous-coupled nanoscale multilayer coating as well as the selective release of carbon component to the contact interface driven by the frictional interaction aided in maintaining low friction. As a result, the nanoscale multilayer coating showed approximately 100-fold greater wear resistance than that of pure hard carbon coating on a ductile steel substrate. |
| Databáze: | OpenAIRE |
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