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. Author manuscript; available in PMC: 2015 Sep 1.
Published in final edited form as: Tribol Int. 2014 Apr 28;77:106–110. doi: 10.1016/j.triboint.2014.04.025

Figure 5.

Figure 5

(A) Schematic of the experiment, (B) contact of the two bearing surfaces, with a magnified view (optical microscope) showing the pattern of spherical indentations (light grey circles) on the CoCr cylinder. (C) Kinematic cycle applied to the CoCr cylinder, and (D) friction coefficient f between the CoCr and UHMWPE specimens as a function of time, showing that the microtextured bearing surface outperforms the smooth bearing surface over most of the kinematic cycle. The data is extracted from a long duration test and the normal load N creates a contact pressure of 11.1 MPa.