| abstract |
A coated cutting tool consisting of a substrate and a single layer or multi-layer hard material coating, the substrate being selected from cemented carbide, cermet, ceramics, cubic boron nitride (cBN), polycrystalline diamond (PCD), steel or high-speed steel (HSS), and the hard material coating comprising at least one layer of gamma-Al 2 O 3 ,exhibiting particularly high hardness and reduced Young's modulus, the gamma-Al 2 O 3 layer of the coated cutting tool being obtainable by means of a reactive magnetron sputtering process using at least one Al target, wherein the deposition is carried out using a reaction gas composition comprising or consisting of argon (Ar) and oxygen (O 2 ) and at a total reaction gas pressure within the range from at least 1 Pa to at most 5 Pa, at an O 2 partial pressure within the range from 0.001 Pa to 0.1 Pa, at a temperature within the range from 400°C to 600°C. |