Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5354310 | Applied Surface Science | 2013 | 8 Pages |
Abstract
Ti-contained a-C gradient composite film with a thickness 1.5 μm was deposited on medical Ti6Al4V alloy substrate using a closed field unbalanced magnetron sputtering with bias-graded voltage through â20 V to â150 V. The mechanical and tribological properties were evaluated from nanoindentation, scratch test and ball-on-disk tribometer. Compared with the constant-bias film deposited at â150 V, the bias-graded film has the approximate hardness (19 GPa) but high toughness and adhesion strength. At a normal load of 10 N, the bias-graded composite film shows a low friction coefficient of 0.08 and wear rate of 2.89 Ã 10â16 m3 Nâ1 mâ1 in ambient air. While in Hanks' solution, the film has the same low friction coefficient but low wear rate of 4.63 Ã 10â17 m3 Nâ1 mâ1. Excellent wear resistance in Hanks' solution may bring about a biological application for the Ti-contained a-C gradient composite film.
Related Topics
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Physical and Theoretical Chemistry
Authors
J.B. Cai, X.L. Wang, W.Q. Bai, X.Y. Zhao, T.Q. Wang, J.P. Tu,