Influence of Ti content on the structure and tribological properties of Ti-DLC coatings in water lubrication

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Qianzhi Wang
  • Fei Zhou
  • Zhifeng Zhou
  • Yang Yang
  • Ce Yan
  • Chundong Wang
  • Igor Bello
  • Shuit-Tong Lee

Detail(s)

Original languageEnglish
Pages (from-to)163-175
Journal / PublicationDiamond and Related Materials
Volume25
Publication statusPublished - May 2012

Abstract

The Ti-DLC coatings with varying Ti content were deposited on Si(100) wafers and 316 L stainless steel substrates using unbalanced magnetron sputtering (UMS) from Ti and C elemental targets at different Ti target currents. The influence of Ti content on the microstructure and phase composition of Ti-DLC films were studied systematically. The tribological properties of Ti-DLC coatings sliding against Al 2O 3 balls in water were investigated using ball-on-disc tribometer, and the worn surfaces on Ti-DLC coatings were analyzed using scanning electronic microscopy and non-contact profilometer. It was revealed that the sp 3/sp 2 carbon ratio first increased as the Ti content increased in the DLC films and then tended to decrease with the further increase of Ti content. TiC nanocrystallites were generated in the DLC coatings. It was also demonstrated that the Ti-DLC coatings with moderate Ti content exhibited enhanced mechanical properties, such as higher hardness and improved tribological behaviors as sliding against Al 2O 3 balls in water lubrication. © 2012 Elsevier B.V. All rights reserved.

Research Area(s)

  • Diamond-like coatings, Friction, Hardness, Microstructure, Wear

Citation Format(s)

Influence of Ti content on the structure and tribological properties of Ti-DLC coatings in water lubrication. / Wang, Qianzhi; Zhou, Fei; Zhou, Zhifeng et al.
In: Diamond and Related Materials, Vol. 25, 05.2012, p. 163-175.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review