Abstract:
An article includes a substrate and a coating provided on a surface of the substrate. The coating includes at least one metal silicide layer consisting essentially of MoSi2 or WSi2 or (Mo, W)Si2 or a platinum group metal silicide and at least one layer consisting essentially of Si3N4.
Abstract translation:一种制品包括基材和设置在基材表面上的涂层。 涂层包括至少一个金属硅化物层,其基本上由MoSi 2或WSi 2或(Mo,W)Si 2或铂族金属硅化物和至少一个由Si 3 N 4组成的层组成。
Abstract:
A bond layer may be applied to the substrate of an article and a first layer may be applied to the bond layer by thermal spray. A second layer may be applied above the first layer by slurry coating.
Abstract:
A method and system for cleaning a metal article. The system is used to employ a method that comprises placing the article in a means defining a chamber; subjecting the article to a gaseous atmosphere in the means defining a chamber, where the gaseous atmosphere consists essentially of carbon, hydrogen, and fluorine; and subjecting the article to the gaseous atmosphere at a temperature in a range from about 815 DEG C to about 1100 DEG C to clean the article.
Abstract:
An article includes a silicon-containing region; at least one outer layer overlying a surface of the silicon-containing region; and a constituent layer on the surface of the silicon-containing region and between and contacting the silicon-containing region and the at least one outer layer, the constituent layer being formed by constituents of the silicon-containing region and being susceptible to creep within an operating environment of the article, wherein the silicon-containing region defines a pluarality of channels and a plurality of ridges that interlock within a plurality of channels formed in the silicon-containing region to physically interlock the at least one outer layer with the silicon-containing region through the constituent layer.
Abstract:
PROBLEM TO BE SOLVED: To provide a method and a device for adjusting filament height in a cathode of an X-ray tube. SOLUTION: A cathode cup 52 of an X-ray tube through which at least one hole is passed is installed, leads 58A-58D of a filament are inserted into the hole up to the height lower than desirable filament height, actual filament height made by insertion is measured, the actual height made by actual insertion is compared with the desirable filament height, the filament height adjustment is decided to be almost equal to the difference between the actual filament height and the desirable filament height, each one end of the leads of the filament is brought into contact with each of adjusting tools 100, 102, 106, and the adjusting tools are moved by the distance almost equal to the filament height adjustment. Therefore, the filament is positioned in the specified filament height.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for electrochemically releasing >=1 metallic film from a substrate. SOLUTION: Since the method of this invention has electrochemical selectivity, an influence of the electrochemical releasing method on a mother alloy is minimized. This method consists of a stage for preparing an electrolyte, a stage for arranging a coated article and >=1 electrode in the electrolyte, a stage for applying a current between the electrode and coated article and a stage for removing >=1 film from the coated article without changing the mother alloy in quality. The system for performing the electrochemical releasing method is composed of an electrode, a DC power source and plural electrodes for applying a DC current to the article to be treated. The DC power source can be connected to the coated article and plural electrodes. One or more films are removed from the mother alloy by this system.
Abstract:
Methods of forming an environmental barrier coating (20) are disclosed. A method includes disposing a powder-based coating on a substrate (12), heat- treating the powder-based coating at a temperature greater than 800°C and less than 1200°C to form a porous coating that includes surface-connected pores, infiltrating at least some of the surface-connected pores of the porous coating with an infiltrant material to form an infiltrated coating, and sintering the infiltrated coating at a temperature greater than 1200°C and less than 1500°C to form the environmental barrier coating (20) on the substrate (12).
Abstract:
Methods of forming an environmental barrier coating (20) are disclosed. A method includes disposing a powder-based coating on a substrate (12), heat-treating the powder-based coating at a temperature greater than 800°C and less than 1200°C to form a porous coating that includes surface-connected pores, infiltrating at least some of the surface-connected pores of the porous coating with an infiltrant material to form an infiltrated coating, and sintering the infiltrated coating at a temperature greater than 1200°C and less than 1500°C to form the environmental barrier coating (20) on the substrate (12).
Abstract:
formulação de remendo com base em silício, remendo ambientalmente resistente com base em silício e método. no presente documento, é estabelecida uma formulação de remendo com base em silício que compreende cerca de 25 a 66 por cento em volume de um solvente; cerca de 4 a 10 por cento em volume de um material aglutinante que compreende silício; e cerca de 30 a 65 por cento em volume de um material de remendo, sendo que o material de remendo compreende partículas que têm um ou mais elementos do grupo iiia não actinídeos, em que uma razão molar entre os um ou mais elementos do grupo iiia não actinídeos e o silício na formulação de remendo é de cerca de 0,95 a 1,25.
Abstract:
Systems and methods for recovery of rare-earth constituents from environmental barrier coatings are provided. One method includes extracting rare-earth (RE) oxide constituents from a feedstock containing RE silicates and non-RE contaminants. The method includes leaching the REs from the feedstock into an acid to form an acid solution, performing an oxalate precipitation on the acid solution to form an RE oxalate hydrate, and separating the RE oxalate hydrate from the acid solution. The method also includes heat treating the RE oxalate hydrate to form an RE oxide containing the RE elements extracted from the feedstock.