Study on Bio-Tribological Properties of Nitrogen Ion Implanted UHMWPE


Article Preview

As the aseptic loosening induced by polyethylene wear debris is the main cause of long-term failure of total joint replacements, increasing the wear resistance of ultrahigh molecular weight polyethylene (UHMWPE) will be very important to obtain long-life artificial joint. In this paper the UHMWPE was implanted with 450 keV N+ ions to three doses of 5×1014/cm2, 2.5×1015/cm2 and 1.25×1016/cm2. The friction and wear behaviors of UHMWPE were studied under lubrication of distilled water and blood plasma using a ball-on-disk tribometer with a ZrO2 ceramic ball as a counterface. Experimental results showed that the friction coefficient of ions implanted UHMWPE are higher than un-implanted UHMWPE. Under blood plasma lubrication condition, the wear rate of implanted UHMWPE was lower than un-implanted UHMWPE, and the wear rate decreased with increasing implantation dose. The plow, plastic deformation and fatigue were wearing mechanism for un-implanted UHMWPE and the abrasive wear for implanted UHMWPE.



Key Engineering Materials (Volumes 288-289)

Edited by:

Xingdong Zhang, Junzo Tanaka, Yaoting Yu and Yasuhiko Tabata




D. S. Xiong, "Study on Bio-Tribological Properties of Nitrogen Ion Implanted UHMWPE", Key Engineering Materials, Vols. 288-289, pp. 649-652, 2005

Online since:

June 2005





[1] D. Dowson: Wear. Vol. 190 (1995), p.171.

[2] D. S. Xiong, S. R. Ge: Wear. Vol. 250 (2001), p.242.

[3] B. Weightman and D. Light: Biomaterials. Vol. 7(1) (1986), p.20.

[4] H. Dong, W. Shi, T. Bell: Wear. Vol. 225-229 (1999), p.146.

[5] N. Chang, A. Bellare, R. E. Cohen, M. Spector: Wear. Vol. 241(2000), p.109.

[6] D. S. Xiong, Z. M. Jin: Surface and Coatings Technology. Vol. 182 (2004), p.149.