Coated superalloy gas turbine components

Patent · Tue Jun 30 04:00:00 EDT 1987

OSTI ID:6179259

Luthra, K L

A gas turbine component is described consisting of a non-symmetrical body made of material selected from the group consisting of nickel-base superalloy, cobalt-base superalloy and iron-base superalloy and an alloy coating metallurgically bonded by an interdiffusion zone and providing the outer surface for the coated body. The composition of the coating consists essentially of (in weight percent) about 43% chromium; about 0.1% yttrium, and oxides; up to 15% silicon; less than the percentage of aluminum which would be required to form a continuous film of aluminum oxide over the outer surface, and the balance essentially cobalt. The concentration of chromium is uniform on a macroscopic scale across the thickness of the coating.

• Assignee: General Electric Co., Schenectady, NY
• Patent Number(s): US 4677034
• OSTI ID: 6179259
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101 -- Metals & Alloys-- Preparation & Fabrication
42 ENGINEERING
421000* -- Engineering-- Combustion Systems
ALLOYS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BONDING
CHALCOGENIDES
CHEMICAL COMPOSITION
CHROMIUM COMPOUNDS
COATINGS
COBALT ALLOYS
COBALT BASE ALLOYS
COBALT COMPOUNDS
DEPOSITION
DIFFUSION
DIMENSIONS
FABRICATION
GAS TURBINES
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
JOINING
MACHINERY
MATERIALS
METALLURGY
NICKEL ALLOYS
NICKEL BASE ALLOYS
OXIDES
OXYGEN COMPOUNDS
QUANTITY RATIO
SILICON COMPOUNDS
SURFACE COATING
THICKNESS
TRANSITION ELEMENT COMPOUNDS
TURBINES
TURBOMACHINERY
YTTRIUM COMPOUNDS
YTTRIUM OXIDES