Patent ID: 6695960
Filing Date: 2004-02-24
Classification: C23C,F01D,Y02T

Abstract:
A process for the production of a metal alloy powder containing nickel and/or cobalt, chromium, aluminium and yttrium in the form of a &ggr; phase and &bgr; phase dispersed in the &ggr; phase, capable of forming from the &bgr; phase, by exposure to air at elevated temperature, an adherent superficial barrier of alumina, wherein the process comprises the step of forming, on a precursor alloy powder containing at least the elements Cr, Al and Y by using a chemical or electrolytic deposition bath, a deposit containing at least one modifying element capable of extending the existence domain of the &bgr; phase and/or increasing the fineness of its dispersion, wherein the modifying element is deposited, at least in part, in the form of particles of the element or of a compound of the latter suspended in a deposition solution, the particles being incorporated in a matrix deposited from ions contained in the solution.