A MAX-phase material is provided for a cutting tool and other applications.

Improved thin film coatings, cutting tool materials and processes for cutting tool applications are disclosed. A boron-doped graded diamond thin film for forming a highly adhesive surface coating on a cemented carbide (WCCo) cutting tool material is provided. The thin film is fabricated in a HFCVD reactor. It is made of a bottom layer of BMCD in contact with a surface layer of the cemented carbide, a top layer made of NCD and a transition layer with a decreasing concentration gradient of boron obtained by changing the reaction conditions through ramp up option in hot filament CVD reactor. The top layer has a low friction coefficient. The bottom layer in the coating substrate interface has better interfacial adhesion through cobalt and boron reactivity and decreased cobalt diffusivity in the diamond. The transition layer has minimized lattice mismatch and sharp stress concentration between the top and bottom layers.

Provided is a sliding member having a hard carbon coating that makes high wear resistance compatible with a low coefficient of friction and that has excellent peeling resistance. A sliding member (100) includes a base member (10) and a hard carbon coating (12) formed on the base member (10). The indentation hardness of the hard carbon coating (12) decreases gradually from the base member side to the surface side. The hard carbon coating (12) has an indentation hardness distribution at 0T/Ttotal0.6 approximated by a first line and an indentation hardness distribution at 0.9T/Ttotal1 approximated by a second line, and the intersection between the first line and the second line (T2/Ttotal, H2) satisfies Expression (1), (H3H1)T2/Ttotal+H1<H20.9H1, and Expression (2), 0.6T2/Ttotal0.9.

Superalloy workpiece including a superalloy substrate and an interface layer (IF-1) of essentially the same superalloy composition directly on a surface of the superalloy substrate, followed by a transition layer (TL) of essentially the same superalloy and supperalloy oxides or a different metal composition and different metal oxides whereby oxygen content of the transition layer is increasing from IF-1 towards a barrier layer (IF-2) of super alloy oxides or of different metal oxides.

An article for high temperature service is presented. The article includes a substrate and a plurality of coatings disposed on the substrate. At least one coating in the plurality of coatings includes an oxide of nominal composition A.sub.xB.sub.1-yD.sub.yO.sub.z, wherein A includes a rare-earth element, B includes tantalum or niobium, D includes zirconium or hafnium, 2x3, 0<y<1, and 6z7.

A coated cutting tool comprising a substrate and a coating layer formed on a surface of the substrate, the coated cutting tool having a rake surface and a flank, in which the coating layer includes an -type aluminum oxide layer, wherein: the -type aluminum oxide layer has, on an opposite side to the substrate, a first interface, being the rake surface or a surface substantially parallel to the rake surface, a second interface, being the flank or a surface substantially parallel to the flank, and an intersecting edge between the first interface and the second interface; and a residual stress value (unit: GPa) measured near each of the first and second interfaces increases continuously or stepwise as a measurement position for the residual stress value becomes distant from the intersecting edge with distances of 10 m, 50 m, 100 m, 150 m and 200 m. (In the above formulae, 11 denotes a residual stress value (MPa) in a direction parallel to the intersecting edge, 22 denotes a residual stress value (MPa) in a direction orthogonal to the intersecting edge, and each of the residual stress values is a value measured by a 2D method.)

A coated steel component is provided. The coated steel component includes a substrate composed of a steel sheet which can be supplied to a hot-forming process. The coated steel component also possesses a non-metallic coating on the basis of silicon, in a layered structure. The layered structure includes three functional layers having the composition SiOxNyCz, wherein x lies between 30 and 70%, y lies between 0 and 35%, and z lies between 0 and 50%.

A coated cutting tool comprising a substrate and a coating layer formed on a surface of the substrate, wherein: the coating layer comprises at least one -type aluminum oxide layer; and, in the -type aluminum oxide layer, when regarding a texture coefficient of a (0,0,6) plane as a TC18 (0,0,6), and also regarding a texture coefficient of a (0,0,12) plane as a TC18 (0,0,12), the TC18 (0,0,6) is the highest texture coefficient and the TC18 (0,0,12) is the second highest texture coefficient.

The present invention relates to a method of providing a multi-layer coating to a surface of a substrate, a multi-layer coating prepared by the method and a component comprising the multi-layer coating. The present invention also relates to a method of suppressing or inhibiting growth of a certain phases and/or structures of a crystalline structure with an amorphous first metal oxide coating and a substrate having a surface bearing the coating.

A coated tool has a substrate and a hard material coating deposited on the substrate. The hard material coating has a layer structure in the following order, starting from the substrate: a titanium nitride layer, a titanium boron nitride transition layer, and a titanium diboride layer. The titanium boron nitride transition layer has a boron content that increases from the titanium nitride layer in the direction of the titanium diboride layer. The boron content does not exceed 15 at %.