Abstract: A coated cutting tool including a substrate and a single layer or multi-layer hard material coating is provided. The substrate is selected from cemented carbide, cermet, ceramics, cubic boron nitride (cBN), polycrystalline diamond, steel or high-speed steel. The hard material coating includes at least one layer of gamma-Al2O3, exhibiting particularly high hardness and reduced Young's modulus. The gamma-Al2O3 layer of the coated cutting tool is 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 of argon (Ar) and oxygen (O2) at a total reaction gas pressure within the range from at least 1 Pa to at most 5 Pa, at an O2 partial pressure within the range from 0.001 Pa to 0.1 Pa, and at a temperature within the range from 400° C. to 600° C.

Abstract: A cutting tool includes a base body and a coating applied thereto. For providing a cutting tool, having both a hard coating that also exhibits fracture toughness, the coating includes at least one oxide layer deposited in the PVD process, consisting of at least 10 alternating single coats of Al2O3 and (Alx, Me1-x)2O3, where 0<x<1, wherein Me is selected from one or more of the group of Si, Ti, V, Zr, Mg, Fe, B, Gd, La and Cr.

Abstract: A method for producing a coated cutting tool includes depositing on every flank face and every rake face of the cutting tool an Al2O3 layer by a HIPIMS process during two-fold or three-fold rotation of the substrates, at a substrate temperature ?350° C. but <600° C., the deposited Al2O3 layer including ?-Al2O3.

Abstract: A coated cutting tool includes a substrate of cemented carbide, cermet, cBN, ceramics or HSS and a coating of a nitride layer, which is a High Power Impulse Magnetron Sputtering (HIPIMS) deposited layer of a nitride of one or more of Ti, Zr, Hf, V, Ta, Nb, Cr, Si and Al, and a HIPIMS-deposited oxide layer being an (AlaMe1?a)2O3 layer, 0.05?a?1, wherein Me is one or more of Ti, Mg, Ag, Zr, Si, V, Fe, Hf, B and Cr. The oxide layer is situated above the nitride layer. Also, a method is disclosed for producing a coated cutting tool having the nitride layer and oxide layer, the nitride layer and the oxide layer being deposited by a HIPIMS process.

Abstract: A cutting tool includes a base body and a coating applied thereto. For providing a cutting tool, having both a hard coating that also exhibits fracture toughness, the coating includes at least one oxide layer deposited in the PVD process, consisting of at least 10 alternating single coats of Al2O3 and (Alx,Me1-x)2O3, where 0<x<1, wherein Me is selected from one or more of the group of Si, Ti, V, Zr, Mg, Fe, B, Gd, La and Cr.

Abstract: A coated cutting tool including a substrate and a single layer or multi-layer hard material coating is provided. The substrate is selected from cemented carbide, cermet, ceramics, cubic boron nitride (cBN), polycrystalline diamond, steel or high-speed steel. The hard material coating includes at least one layer of gamma-Al2O3, exhibiting particularly high hardness and reduced Young's modulus. The gamma-Al2O3 layer of the coated cutting tool is 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 of argon (Ar) and oxygen (O2) at a total reaction gas pressure within the range from at least 1 Pa to at most 5 Pa, at an O2 partial pressure within the range from 0.001 Pa to 0.1 Pa, and at a temperature within the range from 400° C. to 600° C.

Abstract: A coated cutting tool and a process for manufacturing a coated cutting tool consisting of a substrate and a single-layer or multi-layer hard material coating. The substrate is selected from cemented carbide, cermet, ceramics, cubic boron nitride, polycrystalline diamond or high-speed steel. The hard coating includes at least one layer of AlaCrbMecOdNe, wherein a+b+c+d+e=1, a, b, d and e each are >0, c=0 or c>0, a?b, c/(a+b+c)?0.1, wherein Me is at least one element selected from the group consisting of Ti, Zr, Ta, Nb, Hf, Si, and V, and wherein the AlaCrbMecOdNe layer is deposited by an arc vapor deposition process (Arc-PVD) using targets containing Al and Cr with an Al:Cr atomic ratio in the range of 95:5 to 50:50.

Abstract: A method for producing a coated cutting tool includes depositing a 0.5-10 ?m nitride layer, which is a nitride of one or more of Ti, Zr, Hf, V, Ta, Nb, Si, Cr and Al, onto a substrate followed by depositing Al or Al+Me, further followed by depositing a 0.1-5 ?m oxide layer being an (AlaMe1-a)2O3 layer, 0.05?a?1, wherein Me is one or more of Ti, Mg, Ag, Zr, Si, V, Fe, Hf, B and Cr, said layers being deposited by magnetron sputtering. Also, a coated cutting tool including a substrate with a coating having the nitride layer and oxide layer. The coating has inclusions of (Al,Me,O) in the oxide layer at the interface between the nitride layer and the oxide layer, and/or a layer of (Al,Me,O) situated in between the nitride layer and the oxide layer.

Abstract: A coated cutting tool includes a substrate of cemented carbide, cermet, cBN, ceramics or HSS and a coating of a nitride layer, which is a High Power Impulse Magnetron Sputtering (HIPIMS) deposited layer of a nitride of one or more of Ti, Zr, Hf, V, Ta, Nb, Cr, Si and Al, and a HIPIMS-deposited oxide layer being an (AlaMe1?a)2O3 layer, 0.05?a?1, wherein Me is one or more of Ti, Mg, Ag, Zr, Si, V, Fe, Hf, B and Cr. The oxide layer is situated above the nitride layer. Also, a method is disclosed for producing a coated cutting tool having the nitride layer and oxide layer, the nitride layer and the oxide layer being deposited by a HIPIMS process.