The calotte grinding method is used to precisely determine the wear resistance of films and surfaces. A steel ball wetted with abrasive fluid rotating against the specimen grinds a calotte (spherical segment) in the film being examined. The wear coefficient can be calculated from the volume of the calotte. This method is suitable for the examination of films with layer thicknesses ≥ 1 μm. Abrasive wear responds with great sensitivity to changes in the layer composition and structure, which is why it can be used as a parameter for evaluating the quality of films in production.
More information about the Calotte grinder