A cutting tool comprising a base material and a coating, wherein the coating includes a first layer having a multilayer structure in which a first unit layer and a second unit layer are alternately stacked; a thickness of the first unit layer is 2 to 50 nm; a thickness of the second unit layer is 2 to 50 nm; a thickness of the first layer is 1.0 ?m or more and 20 ?m or less, the first unit layer is composed of Ti.sub.aAl.sub.bB.sub.cN, and the second unit layer is composed of Ti.sub.dAl.sub.eB.sub.fN, wherein 0.49?a?0.70, 0.19?b?0.40, 0.10?c?0.20, a+b+c=1.00, 0.39?d?0.60, 0.29?e?0.50, 0.10<f?0.20, d+e+f=1.00, 0.05?a-d?0.20, and 0.05?e-b?0.20 are satisfied, and a percentage of the number of atoms of titanium to the total number of atoms of titanium, aluminum and boron is 45% or more in the first layer.

A method of metallizing a ceramic substrate includes depositing a barrier layer onto the substrate, depositing a tie layer onto the barrier layer, and depositing a metal layer onto the tie layer to metallize the substrate. The barrier layer may include an oxygen rich material, a nitrogen rich material, or a carbon rich material.

A method of metallizing a ceramic substrate includes depositing a barrier layer onto the substrate, depositing a tie layer onto the barrier layer, and depositing a metal layer onto the tie layer to metallize the substrate. The barrier layer may include an oxygen rich material, a nitrogen rich material, or a carbon rich material.

A coated tool according to the present disclosure is a coated tool including a base body and a coating film located on the base body. The coated tool has a first surface with a rake face, a second surface with a flank face, and a third surface located between the first surface and the second surface and being a C surface or an R surface. The coating film includes a first coating film located on the first surface and/or a second coating film located on the second surface, and a third coating film located on the third surface. When a wavenumber of a maximum Raman peak of the first coating film is referred to as a first wavenumber, a wavenumber of a maximum Raman peak of the second coating film is referred to as a second wavenumber, and a wavenumber of the maximum Raman peak of the third coating film is referred to as a third wavenumber, the third wavenumber is smaller than the first wavenumber and the second wavenumber.

A coated tool according to the present disclosure is a coated tool including a base body and a coating film located on the base body. The coated tool has a first surface with a rake face, a second surface with a flank face, and a third surface located between the first surface and the second surface and being a C surface or an R surface. The coating film includes a first coating film located on the first surface and/or a second coating film located on the second surface, and a third coating film located on the third surface. When a wavenumber of a maximum Raman peak of the first coating film is referred to as a first wavenumber, a wavenumber of a maximum Raman peak of the second coating film is referred to as a second wavenumber, and a wavenumber of the maximum Raman peak of the third coating film is referred to as a third wavenumber, the third wavenumber is smaller than the first wavenumber and the second wavenumber.

A coated cutting tool comprising a cemented carbide and a coating layer formed on a surface of the cemented carbide, wherein: an average thickness of the coating layer is from 5.0 m or more to 30.0 m or less; and in the cemented carbide, when regarding a region thereof which ranges from the surface of the cemented carbide to a depth of 20.0 m in a direction opposite to the coating layer as a surface region, and also regarding a region thereof on a side opposite to the coating layer across the surface region as an inner region, an average value of KAM values in the surface region KAM.sub.s and an average value of KAM values in the inner region KAM.sub.i satisfy a condition represented by formula (1) below.

0.00|KAM.sub.sKAM.sub.i|0.10(1)

Described are molds that include a ceramic material at a surface, as well as methods of forming the molds, and methods of using the molds; the ceramic material is constituted substantially, mostly, or entirely of three elemental components designated M, A, and X; the M component is at least one transition metal; the A component is one or a combination of Si, Al, Ge, Pb, Sn, Ga, P, S, In, As, Tl, and Cd; and the X component is carbon, nitrogen, or a combination thereof.

Described are molds that include a ceramic material at a surface, as well as methods of forming the molds, and methods of using the molds; the ceramic material is constituted substantially, mostly, or entirely of three elemental components designated M, A, and X; the M component is at least one transition metal; the A component is one or a combination of Si, Al, Ge, Pb, Sn, Ga, P, S, In, As, Tl, and Cd; and the X component is carbon, nitrogen, or a combination thereof.

A coated cutting tool comprising: a substrate and a coating layer, wherein the coating layer includes a lower layer and an upper layer; the lower layer includes one or two or more specific Ti compound layers; the upper layer includes an ?-type Al.sub.2O.sub.3 layer; an average thickness of the lower layer is 2.0 ?m to 15.0 ?m; an average thickness of the upper layer is 3.5 ?m to 15.0 ?m; in the upper layer, a ratio of a length of ?3 grain boundaries to a total length of 100% of a total grain boundary is more than 50% and 80% or less, and a ratio of the length of ?3 grain boundaries to a total length of 100% of CSL grain boundaries is 70% or more; and in the upper layer, a texture coefficient TC(0,0,12) of the ?-type Al.sub.2O.sub.3 layer is 8.0 or more and 8.9 or less.

A coated cutting tool includes a body and a hard and wear resistant PVD coating on the body, wherein the body is made from a cemented carbide, cermet, ceramics, polycrystalline diamond or polycrystalline cubic boron nitride based materials. The coating includes a first (Ti,Al)-based nitride sub-coating and a second (Ti,Al)-based nitride sub-coating. The first (Ti,Al)-based nitride sub-coating can be a single layer, and the second (Ti,Al)-based nitride sub-coating can be a laminated structure, wherein the first (Ti,Al)-based nitride sub-coating includes a (Ti.sub.1-xAl.sub.x)N.sub.z-layer where 0.1<x<0.4, 0.6<z<1.2, and wherein the second (Ti,Al)-based nitride sub-coating includes a (Ti.sub.1-x1-y1Al.sub.x1Cr.sub.y1)N.sub.z1 layer where 0.5<x1<0.75, 0.05<y1<0.2, 0.6<z1<1.2.