Investigation of the role of tribofilms in self-mating CoCrMo systems utilizing a quartz crystal microtribometer

R. Pourzal, E. J. Martin, S. Vajpayee, Y. Liao, M. A. Wimmer, K. R. Shull*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

A new experimental device has been developed to investigate the properties of tribofilms as they occur in hip implants made from CoCrMo alloys. The device has the ability to detect small mass changes on the alloy surface and consists of CoCrMo alloy pins articulating against a quartz crystal that is sputter coated with the same CoCrMo alloy. The instrument not only measures normal and friction forces, but the quartz substrate also enables the in situ quantification of mass changes due to wear or tribofilm formation with a quartz crystal microbalance (QCM). The functionality of the test rig is demonstrated in a pilot study with different testing fluids, and methods to pre-condition surfaces with a tribofilm-like material are described.

Original languageEnglish (US)
Pages (from-to)161-171
Number of pages11
JournalTribology International
Volume72
DOIs
StatePublished - Apr 2014

Keywords

  • Friction
  • Hip joint
  • QCM
  • Tribofilm

ASJC Scopus subject areas

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

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