Nickel based super alloy, which includes at least, (in wt %): Iron (Fe) 1.5%-6.5% especially 3.5%-5.5%; Chrome (Cr) 12.0%-14.0%; Molybdenum (Mo) 1.0%-2.0%; Wolfram (W) 2.0%-5.0%; Aluminum (Al) 5.2%-5.8%; Tantalum (Ta) 5.0%-7.0%; Hafnium (Hf) 1.2%-1.8%; Silicon (Si) 0.005%-0.4%; Carbon (C) 0.005%-0.1%; Nickel (Ni), optionally Cobalt (Co) 0.0%-5.0%; especially at least 1.0 wt % Cobalt (CO); Boron (B) >0.0%-0.02%; especially maximum 0.005%; Zirconium (Zr) >0.0%-0.05%; especially maximum 0.01% 0-0.05%; reactive element(s), especially Yttrium (Y), Cerium (Ce), Dysprosium (Dy), and/or Lanthanum (La).

The invention concerns a turbine component, such as a turbine blade or a distributor fin, for example, comprising a substrate made from single-crystal nickel superalloy, and a metal sublayer covering the substrate, characterised in that the metal sublayer comprises at least two elementary layers, including a first elementary layer and a second elementary layer, the first elementary layer being arranged between the substrate and the second elementary layer, each elementary layer comprising a -Ni.sub.3Al phase, and optionally a -Ni phase, and in that the average atomic fraction of aluminum in the second elementary layer is strictly greater than the average atomic fraction of aluminum in the first elementary layer.

The present invention relates to a blade or vane for a turbomachine, particularly for an aircraft engine, with a blade element for interacting with the flow medium, wherein the blade has different diffusion protective coatings in various regions on its surface for protection against corrosion and/or oxidation, wherein the diffusion protective coatings are produced by chromizing and/or aluminizing, wherein the blade element is divided into two regions along the longitudinal axis of the blade element, wherein the first region extends over 80 to 95% of the length of the blade element, and the second region extends over the remainder of the length of the blade element, and wherein in both regions, an AlCr diffusion protective coating is applied, and wherein in one of the regions, the AlCr diffusion protective coating has a higher Cr content.

A composite blade includes a composite blade body including reinforced fibers and resin; a metal layer provided on an outer side of a leading edge section including a leading edge that is a part of the composite blade body on an upstream side of an air stream, the metal layer having a thickness of equal to or larger than 5 micrometers and equal to or smaller than 100 micrometers; an adhesive layer provided between the composite blade body and the metal layer to bond the metal layer to the composite blade body; and an electric insulating layer provided in contact with a surface of the leading edge section of the composite blade body, the surface being on the side on which the metal layer is provided, the electric insulating layer having an electric insulating property.

A component includes a diffusion coating comprising an inter-diffusion zone between the diffusion coating and a substrate and a non-metallic inclusions zone adjacent to an outer surface of the diffusion coating. A method of coating a component includes applying an aluminizing slurry to a localized area of a component and applying a chromizing slurry to the localized area of the component subsequent to heat treating the aluminizing slurry.

Disclosed is an austenitic stainless steel alloy that includes or consists of, by weight, about 24% to about 26% chromium, about 11% to about 13% nickel, about 4.5% to about 5.5% manganese, about 1.3% to about 1.7% silicon, about 1.2% to about 1.6% niobium, about 0.40% to about 0.50% carbon, about 0.2% to about 0.4% nitrogen, and a balance of iron with inevitable/unavoidable impurities. The alloy is suitable for use in turbocharger turbine applications for temperatures up to about 1050 C.

A sliding part with a wear resistant coating includes a sliding part, and a wear resistant coating provided on a sliding surface of the sliding part, and made of a cobalt alloy containing chromium and silicon. In the wear resistant coating, oxide particles are dispersed which include an oxide containing chromium and silicon, and have a particle size of 100 m or less when a cross section of the wear resistant coating is observed using an optical microscope with a magnification of 100 times.

Disclosed herein is a method of coating, comprising providing an article having an internal passage therein to be coated; electrolytically applying a first layer that comprises chromium or a chromium alloy onto a surface of the internal passage; electrolytically applying a second layer comprising aluminum or an aluminum alloy onto the first layer; and heat treating the article to promote interdiffusion between the first layer and the second layer.

A steam valve includes a housing defining a steam inlet and steam outlet in fluid communication with a valve cavity, and an annular valve seat disposed within the valve cavity. A control valve is configured to selectively engage the valve seat. The steam valve further includes a stop valve configured to selectively engage the valve seat. The steam valve includes a pressure seal head configured to receive the stop valve. The pressure seal head includes an elongated body having a bore extending longitudinally through the body; and a nose piece extending from an end of the elongated body. The nose piece has at least a tapered end portion and a bore extending longitudinally therethrough. The bore of the nose piece is longitudinally with the bore of the elongated body. The nose piece is formed of a first material which has greater erosion properties than a second material forming the elongated body.

A method of producing a composite metal article and/or a composite metal wear component. The method including the following steps: casting a component composed of a host metal composition wherein one or more cavities are formed in the component during casting; inserting a wear resistant composition in solid form into the one or more cavities formed in the component composed of the host metal composition; and, bonding the wear resistant composition into the one or more cavities of the component composed of the host metal composition to form the composite metal article.