Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.jmbbm.2011.02.005
Title: Tribological characterization of a biocompatible thin film of UHMWPE on Ti6Al4V and the effects of PFPE as top lubricating layer
Authors: Panjwani, B. 
Satyanarayana, N. 
Sinha, S.K. 
Keywords: Coating
Friction
Ti6Al4V
Tribology
UHMWPE
Wear
Issue Date: Oct-2011
Citation: Panjwani, B., Satyanarayana, N., Sinha, S.K. (2011-10). Tribological characterization of a biocompatible thin film of UHMWPE on Ti6Al4V and the effects of PFPE as top lubricating layer. Journal of the Mechanical Behavior of Biomedical Materials 4 (7) : 953-960. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jmbbm.2011.02.005
Abstract: Ultra-high molecular weight polyethylene (UHMWPE) thin film was coated onto Ti6Al4V alloy specimens using dip coating method. Tribological performance of this coating (thickness of 19.6±2.0 μm) was evaluated using 4 mm diameter Si 3N 4 ball counterface in a ball-on-disk tribometer. Tests were carried out for different normal loads (0.5, 1.0, 2.0 and 4.0 N) and rotational speeds of the disk (200 and 400 rpm). UHMWPE coating formed in this study exhibits high hydrophobicity with water contact angle of 135.5±3.3° and meets the requirements of cytotoxicity test using the ISO 10993-5 elution method. This coating shows low coefficient of friction (0.15) and high wear durability (>96,000 cycles) for the tested conditions. PFPE overcoat on UHMWPE has further increased the wear durability of UHMWPE coating as evaluated at even higher rotational speed of 1000 rpm. © 2011 Elsevier Ltd.
Source Title: Journal of the Mechanical Behavior of Biomedical Materials
URI: http://scholarbank.nus.edu.sg/handle/10635/85809
ISSN: 17516161
DOI: 10.1016/j.jmbbm.2011.02.005
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