Superior lubrication of dense/porous-coupled nanoscale C/WS2 multilayer coating on ductile substrate

Shusheng Xu, Yuzhen Liu, Mingyu Gao, Kyeong Hee Kang, Dong Gap Shin, Dae Eun Kim

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)724-732
Number of pages9
JournalApplied Surface Science
Volume476
DOIs
Publication statusPublished - 2019 May 15

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Lubrication
Multilayers
Coatings
Substrates
Carbon
Wear resistance
Steel
Friction
Solid lubricants
Structural optimization
Toughness
Hardness

All Science Journal Classification (ASJC) codes

  • Surfaces, Coatings and Films

Cite this

Xu, Shusheng ; Liu, Yuzhen ; Gao, Mingyu ; Kang, Kyeong Hee ; Shin, Dong Gap ; Kim, Dae Eun. / Superior lubrication of dense/porous-coupled nanoscale C/WS2 multilayer coating on ductile substrate. In: Applied Surface Science. 2019 ; Vol. 476. pp. 724-732.
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Superior lubrication of dense/porous-coupled nanoscale C/WS2 multilayer coating on ductile substrate. / Xu, Shusheng; Liu, Yuzhen; Gao, Mingyu; Kang, Kyeong Hee; Shin, Dong Gap; Kim, Dae Eun.

In: Applied Surface Science, Vol. 476, 15.05.2019, p. 724-732.

Research output: Contribution to journalArticle

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