Abstract:
A turbomachine component includes a silicon nitride substrate and a protective coating on the substrate. The protective coating includes a porous silicon nitride matrix and a noble metal infiltrated in the porous silicon nitride matrix.
Abstract:
A coating material, particularly a thermal barrier coating, for a component intended for use in a hostile environment, such as the superalloy turbine, combustor and augmentor components of a gas turbine engine. The coating material is zirconia that is partially stabilized with yttria and to which lanthana, neodymia and/or tantala are alloyed to increase the impact resistance of the coating.
Abstract:
A method of forming a coating on a work surface of a machine component. The method includes a preparatory step of preparing a feed form formed of a metal material that is softer than at least a work surface of a machine component, a pressure-welding step of pressure-welding an end face of the feed form to the work surface of the machine component while causing relative rotation between the machine component and the feed form, to join the feed form to the machine component, and a cutting step of cutting the feed form in a direction substantially orthogonal to an axis of the relative rotation at a portion near a joining position at which the machine component and the feed form are joined, to add a soft metal layer having a predetermined thickness to the work surface of the machine component.
Abstract:
The invention concerns inhibition of vanadium corrosion of thermal equipment materials burning vanadium-contaminated liquid fuels using nickel compounds. The invention is applicable in particular to liquid fuel combustion in gas turbines.
Abstract:
A compressor includes a piston and a shoe, which contact and slide on one another. The piston includes a sliding surface, on which a solid lubricant film is formed. The shoe includes a sliding surface that slides on the first sliding surface. A soft film that mainly contains soft metal is formed on the second sliding surface. The solid lubricant that forms the solid lubricant film is a solid lubricant other than a soft metal.
Abstract:
A coating material, particularly a thermal barrier coating, for a component intended for use in a hostile environment, such as the superalloy turbine, combustor and augmentor components of a gas turbine engine. The coating material is zirconia that is partially stabilized with yttria and to which lanthana, neodymia and/or tantala are alloyed to increase the impact resistance of the coating.
Abstract:
An aluminum or aluminum alloy surface which during use is exposed to sliding friction has a chemical conversion coating of mostly tin with 0.2-10.0 wt. % cobalt and 0.1 to 12 wt. % bismuth. For example, a swashplate of a swashplate type compressor may be conversion coated on at least part thereof, that is the part that during use contact the shoes. Preferably, the coating is between 0.8 to 2.5 microns thick. The coating on the swash plate permits the use of low silicon alloy aluminum without the need of metal plating or high finish polishing.
Abstract:
A method of forming a film on the machined surface of a machine part, comprising a preparatory process for preparing a supply body formed of a metallic material softer than at least the machined surface of the machine part, a pressure welding process for connecting the supply body to the machine part by pressure-welding the end face of the supply body to the machined surface of the machine part while causing a relative rotation between the machine part and the supply body, and a cutting process for providing a soft metal layer of a specified thickness on the machined surface of the machine part by cutting the supply body in the direction approximately perpendicular to the axis of the relative rotation in the vicinity of a joint position between the machined part and the supply body.