Micro-tribological study of cobalt alloys with and without a carbon coating

Hsin Fu Wang, John C. Nelson, William W. Gerberich

Research output: Contribution to journalConference articlepeer-review


Continuous microscratch tests on an uncoated and a diamond-like carbon coated CoCrMo alloy were performed in air to evaluate the micro-friction and micro-tribology by utilizing a load and depth sensing instrument. By using a diamond-like carbon coating, the friction coefficient for a small applied load was found to decrease compared to the CoCrMo substrate. The hard diamond-like carbon coating prevents the local plastic yielding of the micro-contacts and the adhesion between the metal/metal surfaces during the microscratch tests. However, the effect of the diamond-like carbon coating on the friction was not seen when the applied load is high.

Original languageEnglish (US)
Pages (from-to)785-790
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
StatePublished - Jan 1 1995
EventProceedings of the 1994 MRS Fall Meeting - Boston, MA, USA
Duration: Nov 28 1994Nov 30 1994


Dive into the research topics of 'Micro-tribological study of cobalt alloys with and without a carbon coating'. Together they form a unique fingerprint.

Cite this