Corrosion causes implants to fail

Researchers discover why implant coatings detach - and a method to prevent it. Extra-hard coatings made from diamond-like carbon (DLC) extend the operating lifetime of tools and components. In artificial joints, however, these coatings often fail because they detach. Empa researchers found out why - and developed methods to both make the interface between the DLC layer and the metal underneath corrosion-resistant and to predict the lifetime of the implants. Whether on computer hard disks, saw blades, embossing tools, razor blades or fuel-injection nozzles, extremely hard coatings made of diamond-like carbon (DLC) have proven their value over and over again. They reduce wear and thereby give tools and components a longer operating lifetime. What could be more logical than to apply DLC to medical implants such as artificial joints, reasoned a number of implant manufacturers.