According to various embodiments, a method for manufacturing a metal housing can be provided, comprising: a step of forming a metal base made of a metal material; a step of pretreating the surface of the metal base such that the surface has a predetermined gloss and flatness; an anodizing step of forming a predetermined oxide film on the flat surface of the metal base; a step of coloring the oxide film by using a colorant having a desired color; a sealing step for maintaining the performance and characteristics of the colorant on the colored oxide film; and a step of laminating at least one deposition layer on the upper part of the sealed oxide film.

A turbine article includes a substrate with a geometric surface having a multiple of divots recessed into the substrate, and a ceramic topcoat disposed over the geometric surface, the topcoat including at least a first layer having a first hardness and a second layer having a second hardness, the first hardness different than the second hardness.

A surface-coated cutting tool includes a substrate and a coating film that coats the substrate, wherein the coating film includes a hard coating layer constituted of a domain region and a matrix region, the domain region is a region having a plurality of portions divided and distributed in the matrix region, the domain region has a structure in which a first layer composed of a first Al.sub.x1Ti.sub.(1-x1) compound and a second layer composed of a second Al.sub.x2Ti.sub.(1-x2) compound are layered on each other, the matrix region has a structure in which a third layer composed of a third Al.sub.x3Ti.sub.(1-x3) compound and a fourth layer composed of a fourth Al.sub.x4Ti.sub.(1-x4) compound are layered on each other, the first AlTi compound and the third AlTi compound have a hexagonal crystal structure, the second AlTi compound and the fourth AlTi compound have a cubic crystal structure.

Provided herein is a hydrogen permeation barrier coating, a coated substrate, and methods of coating a substrate.

A surface-coated cutting tool includes a base material and a coating formed on a surface of the base material. The coating includes a first hard coating layer including crystal grains having a sodium chloride-type crystal structure. The crystal grain has a layered structure in which a first layer composed of nitride or carbonitride of Al.sub.xTi.sub.1-x and a second layer composed of nitride or carbonitride of Al.sub.yTi.sub.1-y are stacked alternately into one or more layers. The first layer each has an atomic ratio x of Al varying in a range of 0.6 or more to less than 1. The second layer each has an atomic ratio y of Al varying in a range of 0.45 or more to less than 0.6. The largest value of difference between the atomic ratio x and the atomic ratio y is 0.05≤x−y≤0.5.

A method of continuously depositing a coating on a substrate comprises (a) depositing a first layer of ta-C on a substrate via a CVA process, said first layer having a first hardness and a first thickness of 100 mm or greater; (b) adjusting the parameters of the CVA process and depositing a second layer of ta-C on a substrate via a CVA process, said second layer having a second hardness and a second thickness of 10 mm or less, and (c) repeating the above steps to provide a coating comprising at least 5 such first layers and at least 4 such second layers, wherein the first thickness is greater than the second thickness and the first hardness is greater than the second hardness.

A component (100), in particular for a valve train system, having a substrate (3) and a layer system (1) applied at least in parts to the substrate (3), wherein the layer system (1) includes a friction-reducing and wear-reducing protective layer (2) for forming a component surface, wherein the protective layer (2) has at least one first sub-layer (4, 4a) made of doped tetrahedral amorphous carbon, which includes sp.sup.3-hybridized carbon having a mole fraction of at least 50%, wherein the first sub-layer (4, 4a) contains oxygen in a concentration in the range from 0.1 at % to 3.0 at % and hydrogen in a concentration in the range from 0.1 at % to 15 at %, and wherein the first sub-layer (4, 4a) has one or more of the following dopants in a concentration in the range from 0.03 at % to 15 at %: chromium, molybdenum, tungsten, silicon, copper, niobium, zirconium, vanadium, nickel, iron, silver, hafnium, fluorine, boron and nitrogen. A method for producing such a component (100) is also provided.

A surface-coated cutting tool includes a substrate and a coating film. The coating film includes an alternate layer. The alternate layer includes a first layer having a first composition and a second layer having a second composition. The alternate layer is formed by alternately stacking at least one first layer and at least one second layer. The first layer and the second layer each have a thickness not smaller than 2 nm and not greater than 100 nm. The first composition is expressed as Ti.sub.aAl.sub.bSi.sub.cN (0.25≤a≤0.45, 0.55≤b≤0.75, 0≤c≤0.1, a+b+c=1). The second composition is expressed as Ti.sub.dAl.sub.eSi.sub.fN (0.35≤d≤0.55, 0.45≤e≤0.65, 0≤f≤0.1, d+e+f=1). The first composition and the second composition satisfy a condition of 0.05≤d−a≤0.2 and 0.05≤b−e≤0.2.

The purpose of the present invention is to provide a coated metal mold having superior durability and adhesion resistance over a usage range from cold to warm/hot; and a method for manufacturing the coated metal mold. The coated metal mold is characterized by having a hard coating on a surface, wherein the hard coating includes an A layer formed from a nitride and having a film thickness not smaller than 5 μm, and a B layer formed of a diamond-like carbon coating, the B layer is disposed closer to the outer surface side than the A layer, the surface of the B layer has an arithmetic mean roughness Ra≤0.2 μm, a maximum height Rz≤2.0 μm, and a skewness Rsk<0.

A method for coating a substrate 11 is disclosed. The method includes at least the following steps: depositing a first base layer 22 comprising a nitride of at least Al and Cr on the substrate 11 by physical vapor deposition at a gradually increasing substrate bias voltage from a first substrate bias voltage to a second substrate bias voltage; depositing a second base layer 23 comprising a nitride of at least Al and Cr on the first base layer 22 by physical vapor deposition at a constant substrate bias voltage that is greater or equal to the second substrate bias voltage; and depositing an outermost indicator layer 24 on the second base layer 23, wherein the outermost indicator layer 24 comprises a nitride of Si and Me, wherein Me is at least one of Ti, Zr, Hf, and Cr, wherein the outermost indicator layer 24 is deposited by physical vapor deposition at a substrate bias voltage that is less than the constant substrate bias voltage applied during deposition of the second base layer 23.