Influences of ceramic mating balls on the tribological properties of Cr/a-C coatings with low chromium content in water lubrication

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

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Author(s)

  • Qianzhi Wang
  • Fei Zhou
  • Xiangdong Ding
  • Zhifeng Zhou
  • Shuit-Tong Lee

Detail(s)

Original languageEnglish
Pages (from-to)354-360
Journal / PublicationWear
Volume303
Issue number1-2
Publication statusPublished - 15 Jun 2013

Abstract

The influences of ceramic mating balls (SiC, Si3N4, Al2O3) on the tribological properties for hydrogen-free amorphous carbon (a-C) coatings and Cr/a-C coatings with low Cr content (3at%) in water lubrication were investigated. The composition and microstructure of a-C and Cr/a-C coatings were characterized by X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy, respectively, and the mechanical and water-lubricated tribological properties were investigated using nano-indenter and ball-on-disc tribo-meter. The results revealed that the sp3/sp2 ratio of the Cr/a-C coatings increased, while the hardness and water wetting contact angle for the Cr/a-C coatings decreased in comparison to those of a-C coatings. The ranking of friction coefficients for a-C/balls and Cr/a-C/balls tribopairs was μmSiC>μmSi3N4>μmAl2O3, which was determined by the interactive effects among mechanical properties, hydration reaction and contact pressure for coatings/balls tribopair. The specific wear rates of Cr/a-C coatings were slightly higher than those of a-C coatings. © 2013 Elsevier B.V.

Research Area(s)

  • Carbon-based coatings, Sliding friction, Tribochemistry, Wear testing

Citation Format(s)

Influences of ceramic mating balls on the tribological properties of Cr/a-C coatings with low chromium content in water lubrication. / Wang, Qianzhi; Zhou, Fei; Ding, Xiangdong; Zhou, Zhifeng; Zhang, Wenjun; Li, Lawrence Kwok-Yan; Lee, Shuit-Tong.

In: Wear, Vol. 303, No. 1-2, 15.06.2013, p. 354-360.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review