Ultra-thin carbon-based nanocomposite coatings for superior wear resistance under lubrication with nano-diamond additives

Mahdi Khadem, Oleksiy V. Penkov, Vladimir E. Pukha, Maxim V. Maleyev, Dae Eun Kim

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Ultra-thin carbon-based nanocomposite coatings comprised of graphite nanocrystals embedded in diamond-like carbon (DLC) matrix were deposited on stainless steel substrates by the C60 ion beam method, as a wear protective coating. Increasing the C60 irradiation energy and deposition temperature led to the formation of graphite nanocrystals with a size of less than 2 nm. The wear characteristics of the coatings were investigated in the presence of engine base oil with nano-diamond particle (NDP) additives that are commonly used to lower friction and wear. The nanocomposite coating deposited at 5 keV, 300 °C showed the highest sp3 content and the best tribological characteristics. A minimum coefficient of friction of 0.07 and a wear rate of 1.8 × 10-12 mm3 N-1 mm-1 could be achieved which was lower than the best previously reported data considering that the contact pressure was greater than 1 GPa. Such a high wear resistance of the nanocomposite coating was attributed to their unique structure that simultaneously provided high hardness and elasticity while in contact with nano-diamond particles.

Original languageEnglish
Pages (from-to)56918-56929
Number of pages12
JournalRSC Advances
Volume6
Issue number62
DOIs
Publication statusPublished - 2016 Jan 1

Fingerprint

Diamond
Lubrication
Wear resistance
Diamonds
Nanocomposites
Carbon
Wear of materials
Coatings
Graphite
Nanocrystals
Friction
Stainless Steel
Protective coatings
Ion beams
Elasticity
Oils
Stainless steel
Hardness
Irradiation
Engines

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Khadem, Mahdi ; Penkov, Oleksiy V. ; Pukha, Vladimir E. ; Maleyev, Maxim V. ; Kim, Dae Eun. / Ultra-thin carbon-based nanocomposite coatings for superior wear resistance under lubrication with nano-diamond additives. In: RSC Advances. 2016 ; Vol. 6, No. 62. pp. 56918-56929.
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Ultra-thin carbon-based nanocomposite coatings for superior wear resistance under lubrication with nano-diamond additives. / Khadem, Mahdi; Penkov, Oleksiy V.; Pukha, Vladimir E.; Maleyev, Maxim V.; Kim, Dae Eun.

In: RSC Advances, Vol. 6, No. 62, 01.01.2016, p. 56918-56929.

Research output: Contribution to journalArticle

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