Abstract:
An aluminium or aluminium 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 (20) 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 (30) on the swash plate permits the use of low silicon alloy aluminium without the need of metal plating or high finish polishing.
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 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 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 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 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:
PURPOSE: Disclosed is an aluminum product whose surface is deposited with a chemical coating film of tin, bismuth and cobalt maintaining lubricity while its wear resistance and adhesion are improved. CONSTITUTION: A product having the surface of aluminum or an aluminum alloy and exposed to sliding friction when used is applied with a chemical coating film composed of tin, 0.2 to 10.0 wt% cobalt and 0.1 to 12 wt% bismuth. For example, at least a part of the part in contact with a shoe on the swash plate of a swash plate type compressor is applied with the coating film. Its thickness is preferably controlled to 0.8 to 2.5 microns. The chemical coating film on the swash plate(20) allows the use of a low silicon aluminum alloy without using metallic plating and finish polishing.