Wear resistant coating produced from at least two different AlCr-based targets

A coating system (210) deposited on a surface of a substrate (201), the coating system comprising an under coating film (212), an interjacent coating film (216) deposited as a multi-layered film, the multi-layered film consisting of a plurality of A-layers and a plurality of B-layers deposited in an alternating sequence, each of the A-layers comprising aluminium chromium and optionally one or more dopant elements and each of the B-layers comprising aluminium chromium nitride and one or more dopant elements, wherein,

• the under coating film (212) is deposited on the surface of the substrate (201) to be coated or in any case closer to the substrate (201) than the interjacent coating film (216),
• the interjacent coating film (216) is deposited between the under coating film (212) and an upper coating film (220),
• the upper coating film (220) is deposited more distant from the substrate (201) than the interjacent coating film (216),
• each of the A-layers comprise:
• aluminium (Al), chromium (Cr) and nitrogen (N), or
• aluminium (Al), chromium (Cr), nitrogen (N) and one or more dopant elements selected from boron (B), yttrium (Y), tantalum (Ta), silicon (Si), tungsten (W), titanium (Ti), calcium (Ca), magnesium (Mg), iron (Fe), cobalt (Co), zinc (Zn) and niobium (Nb),
• each of the B-layers comprise aluminium (Al), chromium (Cr), nitrogen (N) and one or more dopant elements selected from boron (B), yttrium (Y), tantalum (Ta), silicon (Si), tungsten (W), titanium (Ti), calcium (Ca), magnesium (Mg), iron (Fe), cobalt (Co), zinc (Zn) and niobium (Nb),
• wherein:
• the A layers differ from the B layers at least in the chemical composition of each layers, wherein:
• at least one chemical element is present in each of the B layers but not present in each of the A layers or is present in each of the B layers but not present in each of the A layers, or
• if both A layers and B layers contain the same chemical elements, then a concentration of the chemical elements in the B layers differs from the concentration of the chemical elements in the A layers, and
• a concentration of the one or more dopants in each of the B layers is higher than a concentration of the one or more dopant elements in each of the A layers, if any, and
• wherein a ratio of concentration in atomic percentage of aluminium to chromium (Al/Cr) varies along a total thickness of the coating system, wherein a range of variation of the ratio of concentration Al/Cr is between 69/31 and 79/2.