Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10228355 | Biomaterials | 2014 | 7 Pages |
Abstract
Following wear testing in a hip simulator, the bearing surfaces of 36Â mm metal on metal total hip replacements showed the formation of tribochemical layers. These layers were investigated in a transmission electron microscope, and analysis was performed using electron energy loss spectroscopy, energy dispersive x-rays and selected area electron diffraction. The tribofilm formed at the edge of the wear scar was 100Â s of nanometres thick and contained cobalt sulphide particles embedded within. The film itself was rich in carbon, and appeared to contain no long range graphitic ordering when analysed with electron energy loss spectroscopy, and the spectra gathered from the tribofilm closely resembled those collected from amorphous carbon. The location at which the most substantial tribological layers formed may be explained by the formation of a blunt wedge at the edge of the wear scar following conformal changes to the bearing surfaces.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Bioengineering
Authors
James Hesketh, Michael Ward, Duncan Dowson, Anne Neville,