Tribological properties of graphene oxide nanosheet coating fabricated by using electrodynamic spraying process

Hae Jin Kim, Oleksiy V. Penkov, Dae Eun Kim

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Graphene oxide nanosheet (GONS) coatings were fabricated by using electrodynamic spraying process (ESP) with the aim to utilize the coatings as a solid lubricant. Well-dispersed GONSs in a mixture of EtOH/H2O solution was deposited on Si (100) substrates. The characteristics of the coatings such as surface roughness and thickness were assessed with respect to the coating process parameters. Tribological properties of the GONS coatings with different thickness were investigated using a pin-on-reciprocating type of a tribotester under various applied loads. Surface morphology and chemical bonding composition of the coatings inside and outside of the wear track were characterized with atomic force microscope and Raman spectroscopy, respectively. The experimental results revealed that with proper ESP conditions, GONS coatings resulted in a low friction coefficient of ~0.1. This outcome was largely attributed to GONS transferred to the counter surface which remained stable throughout the sliding process. Furthermore, GONS coatings showed better surface protection ability and lower frictional property compared with single-layer graphene coatings. The results of this work demonstrate the feasibility of employing ESP to fabricate graphene-based solid lubricants cost effectively.

Original languageEnglish
Article numbers11249-015-0467-8
JournalTribology Letters
Volume57
Issue number3
DOIs
Publication statusPublished - 2015 Jan 1

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Nanosheets
Electrodynamics
spraying
Spraying
electrodynamics
Oxides
Graphene
graphene
coatings
Coatings
oxides
solid lubricants
Solid lubricants
coefficient of friction
coating
sliding
surface roughness
counters
Surface morphology

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Mechanics of Materials
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

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Tribological properties of graphene oxide nanosheet coating fabricated by using electrodynamic spraying process. / Kim, Hae Jin; Penkov, Oleksiy V.; Kim, Dae Eun.

In: Tribology Letters, Vol. 57, No. 3, s11249-015-0467-8, 01.01.2015.

Research output: Contribution to journalArticle

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