A method of pressure sintering an environmental barrier coating on a surface of a ceramic substrate to form an article includes the steps of etching the surface of the ceramic substrate to texture the surface, disposing an environmental barrier coating on the etched surface of the ceramic substrate wherein the environmental barrier coating includes a rare earth silicate, and pressure sintering the environmental barrier coating on the etched surface of the ceramic substrate in an inert or nitrogen atmosphere at a pressure of greater than atmospheric pressure such that at least a portion of the environmental barrier coating is disposed in the texture of the surface of the ceramic substrate thereby forming the article.

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.

An impeller blade that includes an impeller blade body constructed of a first material. The impeller blade body defines a leading edge that faces a direction of rotation. A second material couples to the leading edge. The second material is a more erosion resistant material than the first material. The second material extends over the leading edge a distance to absorb high angle impacts of droplets and/or particulate. A third material couples to at least a portion of the impeller blade body.

The present invention discloses a turbine engine with at least a high pressure and a low pressure turbine section comprising a casing and at least one turbine blade rotatably mounted within the casing wherein at least part of the inner surface of the casing is covered with shrouds as abradables to provide clearance control between the inner surface and the tip of the at least one blade and wherein the tip of the blade is coated with a hard PVD coating, characterized in that the shroud material of at least the high pressure and/or the low pressure section comprises a porous ceramic based material and the hard PVD coating on the tip of the blade essentially consists of a droplet free nitride coating.

An example high-performance system may include an example high-performance component. The high-performance component may include a substrate defining a channel. The channel defines a leading ramp and a trailing ramp. The example high-performance component includes an abradable track between the leading and the trailing ramps. The abradable track includes a porous abradable composition. The example high-performance system may include a rotating component configured to contact and abrade the abradable track. An example technique for forming the abradable track includes thermal spraying a precursor composition at the channel to form the abradable track.

An article includes a monolithic substrate and a coating on the monolithic substrate. The monolithic substrate is selected from graphite, silicon carbide, silicon carbide nitride, silicon nitride carbide, and silicon nitride. The coating has a free, exposed surface and includes a compound of aluminum (Al), boron (B) and nitrogen (N) in a continuous chemically bonded network having AlN bonds and BN bonds. The compound includes an atom of nitrogen covalently bonded to an atom of boron and an atom of aluminum, and the compound has a composition B.sub.xAl.sub.(1-x)N, where x is 0.001 to 0.999.

The present invention relates to a method for producing a multilayer film comprising aluminum, chromium, oxygen and nitrogen, in a vacuum coating chamber, the multilayer film comprising layers of type A and layers of type B deposited alternate one of each other, wherein during deposition of the multilayer film at least one target comprising aluminum and chromium is operated as cathode by means of a PVD technique and used in this manner as material source for supplying aluminum and chromium, and an oxygen gas flow and a nitrogen gas flow are introduced as reactive gases in the vacuum chamber for reacting with aluminum and chromium, thereby supplying oxygen and nitrogen for forming the multilayer film, characterized in that: The A layers are deposited as oxynitride layers of AlCrON by using nitrogen and oxygen as reactive gas at the same time, The B layers are deposited as nitride layers of AlCrN by reducing the oxygen gas flow and by increasing the nitrogen gas flow in order to use only nitrogen as reactive gas for the formation of the AlCrN layer, and wherein the relation between oxygen content and nitrogen content in the multilayer film correspond to a ratio in atomic percentage having a value between and including 1.8 and 4.

This disclosure provides a method of pressure sintering an environmental barrier coating on a surface of a ceramic substrate to form an article. The method includes the steps of etching the surface of the ceramic substrate to texture the surface, disposing an environmental barrier coating on the etched surface of the ceramic substrate wherein the environmental barrier coating includes a rare earth silicate, and pressure sintering the environmental barrier coating on the etched surface of the ceramic substrate in an inert or nitrogen atmosphere at a pressure of greater than atmospheric pressure such that at least a portion of the environmental barrier coating is disposed in the texture of the surface of the ceramic substrate thereby forming the article.

Provided are a composite coating layer having improved erosion resistance and a turbine component including the same. The composite coating layer may include a TiN layer; and a TiAlN layer, wherein the composite coating layer is formed by alternately stacking the TiN layer and the TiAlN layer, and a total number of layers including the TiN layer and the TiAlN layer is 6 to 18, whereby the composite coating layer is capable of exhibiting high erosion resistance, high hardness, superior high-cycle fatigue characteristics and low surface roughness. Moreover, the turbine component including the composite coating layer is also capable of manifesting improved properties, such as high erosion resistance, high hardness, superior high-cycle fatigue characteristics and low roughness, thus remarkably increasing lifespan characteristics.

A coating for an article includes a seal coat comprising self-healing particles disposed in a seal coat matrix and a bond coat disposed on the seal coat. The bond coat includes a matrix, diffusive particles disposed in the matrix, and gettering particles disposed in the matrix. A coating for an article and a method of applying a coating to an article are also disclosed.