Author/Authors :
Chevalier، نويسنده , , Jérôme and Taddei، نويسنده , , Paola and Gremillard، نويسنده , , Laurent and Deville، نويسنده , , Sylvain and Fantozzi، نويسنده , , Gilbert and Bartolomé، نويسنده , , J.F. and Pecharroman، نويسنده , , M. Calvo-Terrades and J. C. Sevilla-Moya، نويسنده , , J.S. and Diaz، نويسنده , , L.A. and Torrecillas، نويسنده , , R. and Affatato، نويسنده , , Saverio، نويسنده ,
Abstract :
Alumina-zirconia nano-composites were recently developed as alternative bearing materials for orthopedics. Previous, preliminary reports show that such alumina-zirconia nanocomposites exhibit high crack resistance and low wear rate. In this paper, additional information is given in terms of wear, crack resistance and ageing behaviour: femoral heads are inspected after 7 million cycles of wear testing on a hip simulator, crack resistance is measured and compared to other ceramics used today in orthopedics, slow crack growth is reported under static and cyclic fatigue, and aging resistance is assessed. We also report on the load to failure of femoral heads prototypes during compression tests. This overall reliability assessment ensures a potential future development for these kinds of new nanocomposites in the orthopedic field.
Keywords :
crack resistance , SEM , Ceramic nano-composites , Photoluminescence , AFM , Aging resistance
