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 %.

A member for a plasma processing device includes: an aluminum base material; and an oxide film formed on the aluminum base material and having a porous structure, the oxide film including a first oxide film formed on a surface of the aluminum base material, a second oxide film formed on the first oxide film, and a third oxide film formed on the second oxide film, wherein the first oxide film is harder than the second oxide film and the third oxide film, and a hole formed in each of the first oxide film, the second oxide film and the third oxide film is sealed.

A PVD vacuum plating process for an aluminum alloy surface is provided. The process includes forming a bottom layer: bombarding with an arc power supply, with a bias voltage being controlled at 200-300 V, and the time being controlled at 3-5 minutes; forming an intermediate multi-layer: conducting multilayer transition with an oxide and a nitride, with the number of layers being controlled at 8-10, the time for an individual layer being controlled at 10-20 minutes, and a target current being controlled at 10-20 A. The process also includes forming a transitional engagement layer: conducting mixed sputtering of a transition layer and a color layer for the time of 15-25 minutes; forming the color layer: controlling the time for the color layer at 20-30 minutes; and forming a protective layer: using a high-frequency and large-energy power supply with the time controlled at 40-50 minutes, the process thereby eliminating water plating steps.

A surface-coated cutting tool has a hard coating layer including an upper layer α, an adhesion layer β, and a lower layer γ. The upper layer α is formed of an α-Al.sub.2O.sub.3 layer formed under low temperature conditions. The adhesion layer β includes a TiCN layer having a thickness of 0.5 μm or more in an outermost layer and contains 0.5 to 3 μm to a maximum depth of 0.5 μm toward the inside in a layer thickness direction of the TiCN layer from the interface between the TiCN layer and the upper layer α. The lower layer γ is formed of (Ti.sub.1-XAl.sub.X)(C.sub.YN.sub.1-Y) of a single phase of a NaCl type face-centered cubic structure, in which an average content ratio X.sub.avg of Al and an average content ratio Y.sub.avg of C in this composition formula satisfy 0.60≤X.sub.avg≤0.95 and 0≤Y.sub.avg≤0.005.

Disclosed is a part including a metal substrate, a non-hydrogenated amorphous ta-C or aC carbon coating that coats the substrate, and an undercoat which is based on chromium (Cr), carbon (C) and silicon (Si) and is disposed between the metal substrate and the amorphous carbon coating and to which the amorphous carbon coating is applied, characterized in that the undercoat included, at its interface with the amorphous carbon coating, a ratio of silicon in atomic percent to chromium in atomic percent (Si/Cr) of 0.35 to 0.60, and a ratio of carbon in atomic percent to silicon in atomic percent (C/Si) of 2.5 to 3.5.

An object of the present invention is to provide magnesium oxide for an annealing separator which is useful for obtaining grain-oriented electromagnetic steel sheets with excellent magnetic properties and insulating properties. To resolve the above object, an aspect of the present invention resides in magnesium oxide for an annealing separator having a Blaine specific surface area of 2.5×10.sup.3 to 7.0×10.sup.3 m.sup.2.Math.kg.sup.−1 and CAA of 50 to 170 seconds.

Thermal barrier coatings and methods to make such coatings present improved resistance to CMAS infiltration. The method for forming a thermal barrier coating includes applying a layer of the thermal barrier coating to a component having a surface, forming a plurality of first channels in the thermal barrier coating, and forming a plurality of second channels in the thermal barrier coating. The first channels extend through a thickness of the thermal barrier coating from an interface with the surface of the component to a free surface opposite the interface. The second channels are disposed between the free surface and the interface and extending lengthwise generally parallel to the free surface of the thermal barrier coating, wherein the thermal barrier coating comprises a material comprising yttrium aluminum garnet (YAG) or yttria stabilized zirconia (YSZ).

In some examples, a method including depositing a plurality of particles on a ceramic or ceramic matrix composite (CMC) substrate to form a barrier coating on the ceramic or CMC substrate, the plurality of particles including a silica-rich rare earth (RE) disilicate material and a second material, wherein the silica-rich RE disilicate material includes excess silica compared to a stoichiometric RE disilicate material, wherein the barrier coating includes a first domain including the silica-rich RE disilicate material and a second phase, the second phase being disposed at grain boundaries, splat boundaries, or both of the barrier coating.

The present disclosure relates to a laminate and a method for preparing the same. The laminate comprises a substrate, a coating layer, and a water-repellent layer sequentially laminated, the coating layer comprises a first coating layer and a second coating layer laminated one or more times alternately, the first coating layer comprises at least one metal oxide selected from a group consisting of a lanthanide metal oxide, a transition metal oxide, and a composite metal oxide comprising lanthanum metal and transition metal, the second coating layer comprises an alkaline earth metal fluoride and a transition metal oxide.

A part made from a composite material having a ceramic matrix and including a protection device, the protection including a coating layer having a gradual composition. The gradual-composition coating layer includes at least one silicon phase and one aluminium phase, the proportions of which change according to the height in the layer, with a first height in the gradual-composition coating layer corresponding to a silicon-free composition, and a second height corresponding to an aluminium-free composition. A method for producing such a protection, and to a device for carrying out the method, are disclosed.