Composite of a substrate with a structured coating, cutting element and method for producing a cutting element

A cutting element formed from a composite of a substrate with a structured coating, the cutting element comprising of a substrate with a surface in contact with a coating,

• wherein the substrate has a plurality of substrate recesses at least in regions of the substrate surface and the coating extends into the recesses of the substrate, and
• the coating has an inner surface being in contact with the substrate and a surface opposite to the inner surface, and
• the coating comprises at the surface a plurality of coating recesses being smaller than the recesses at the surface of the substrate resulting in a structured coating,
• wherein the surface of the structured coating has a total surface area Atot, a total recess area Ar and a contact area Ac=Atot−Ar wherein Ac/Atot is in the range of 0.1 to 0.8.