Wear resistant layer comprises a number of first and second single layers containing a hard material phase arranged over each other in an alternating manner. The single layers contain an amorphous carbon phase which acts as a matrix or a grain boundary phase for the hard material phase. The first single layer has a carbon phase component containing over 50 mol.% carbon and the second single layer has a hard material phase component containing over 50 mol.% hard material. The hard material is nano-crystalline.
