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Tribological behavior of hydrogenated diamond-like carbon on polished alumina substrate with chromium interlayer for biomedical application

Journal Article


Abstract


  • Diamond-like carbon (DLC) is a promising material for wear resistant films because of its high hardness and moderate elastic modulus. To enhance its performance in orthopedic implant applications, a better understanding of the tribological effect of DLC coating is essential. DLC with hydrogen, that is: hydrogenated amorphous carbon (aC:H) was deposited on the polished alumina (Al2O3) substrate by magnetron sputtering. X-ray diffraction, energy dispersive spectroscopy and transmission electron microscopy were used to determine the phase compositions in the films. The a-C:H coated surface exhibits hydrophilic characteristic for protein absorption, with low water contact angles of 69.5°. It was found that the a-C:H, which has high hardness and moderate elastic modulus resulted in a relatively high H/E ratio of around 0.133. This result enables the film to conform well with the substrate and provide good wear resistance. The tribology test showed a significant reduction in the friction coefficient of the coated layer as compared to the uncoated surface rubbing on the Al2O3 counterface. The aC:H coated pin against a-C:H coated block showed a stable and low friction coefficient under all loading conditions.

Authors


  •   Hee, Ay Ching (external author)
  •   Zhao, Yue
  •   Choudhury, Dipankar (external author)
  •   Ghosh, Subir (external author)
  •   Zhu, Qiang (external author)
  •   Zhu, Hongtao

Publication Date


  • 2016

Citation


  • Hee, A., Zhao, Y., Choudhury, D., Ghosh, S., Zhu, Q. & Zhu, H. (2016). Tribological behavior of hydrogenated diamond-like carbon on polished alumina substrate with chromium interlayer for biomedical application. Biotribology, 7 1-10.

Scopus Eid


  • 2-s2.0-84977272480

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/243

Number Of Pages


  • 9

Start Page


  • 1

End Page


  • 10

Volume


  • 7

Abstract


  • Diamond-like carbon (DLC) is a promising material for wear resistant films because of its high hardness and moderate elastic modulus. To enhance its performance in orthopedic implant applications, a better understanding of the tribological effect of DLC coating is essential. DLC with hydrogen, that is: hydrogenated amorphous carbon (aC:H) was deposited on the polished alumina (Al2O3) substrate by magnetron sputtering. X-ray diffraction, energy dispersive spectroscopy and transmission electron microscopy were used to determine the phase compositions in the films. The a-C:H coated surface exhibits hydrophilic characteristic for protein absorption, with low water contact angles of 69.5°. It was found that the a-C:H, which has high hardness and moderate elastic modulus resulted in a relatively high H/E ratio of around 0.133. This result enables the film to conform well with the substrate and provide good wear resistance. The tribology test showed a significant reduction in the friction coefficient of the coated layer as compared to the uncoated surface rubbing on the Al2O3 counterface. The aC:H coated pin against a-C:H coated block showed a stable and low friction coefficient under all loading conditions.

Authors


  •   Hee, Ay Ching (external author)
  •   Zhao, Yue
  •   Choudhury, Dipankar (external author)
  •   Ghosh, Subir (external author)
  •   Zhu, Qiang (external author)
  •   Zhu, Hongtao

Publication Date


  • 2016

Citation


  • Hee, A., Zhao, Y., Choudhury, D., Ghosh, S., Zhu, Q. & Zhu, H. (2016). Tribological behavior of hydrogenated diamond-like carbon on polished alumina substrate with chromium interlayer for biomedical application. Biotribology, 7 1-10.

Scopus Eid


  • 2-s2.0-84977272480

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/243

Number Of Pages


  • 9

Start Page


  • 1

End Page


  • 10

Volume


  • 7