Metasul® Metal-on-Metal Technology
Surface
Surface Key Factor: Roughness
The roughness of a metal-on-metal articulation and material processing are the key surface factors controlling its wear behavior. According to Chan et al.1 and Jin et al.2, the roughness of the components must be as low as possible in order to improve lubrication and help minimize the amount of wear.
Optimized grinding and polishing of the wrought CoCr alloy allows Metasul components to be produced with a max roughness Ra of 0.006µm. This value is extremely low and comparable to the mean roughness of alumina ceramic components3,4. This mean roughness is significantly lower than the roughness measured on some cast metal-on-metal components.
These diagrams demonstrate that a Metasul component has a lower roughness than a metal-on-metal component manufactured from a cast CoCr alloy.
