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Plastic deformation and wear of the ultra-high molecular weight polyethylene (UHMWPE) insert have been pointed out as major issues relating to the long-term stability of an orthopaedic implant. The deposition of protective hard, tough and well-adhered zirconia (ZrO2) thin films directly on the surface of the UHMWPE component via the Pulsed Plasma Deposition (PPD) technique has been already demonstrated to be a feasible way to approach this problem. In the current study, the tribo-mechanical properties of ZrO2-coated UHMWPE with respect to pristine UHMWPE were investigated in detail. Specifically, strength to local plastic deformation, indentation work portioning and creep behavior were evaluated through nanoindentation and micro-scratch tests. Further, preliminary wear data (i.e., rate and volume) were obtained by tribology tests mating coated and pristine UHMWPE with an alumina ball under dry …
World Scientific Publishing Company
Publication date: 
28 Oct 2015

Michele Bianchi, Marco Boi, Nicola Lopomo, Maria Cristina Maltarello, Fabiola Liscio, Silvia Milita, Andrea Visani, Alessandro Russo, Maurilio Marcacci

Biblio References: 
Volume: 15 Issue: 05 Pages: 1550070
Journal of Mechanics in Medicine and Biology