Patent ID: 6296043
Filing Date: 2001-10-02
Classification: B22D,C23C,Y02T

Abstract:
A method of making a superalloy article, comprising:directing an atomized superalloy spray atomized by an atomizing gas at a collector disposed in a spray chamber,controlling temperature of the spray in flight in the spray chamber and of the atomized superalloy spray as it is deposited on the collector by evacuating the spray chamber as the spray is directed at the collector to remove the atomizing gas using a vacuum pumping system communicated to said spray chamber and effective to provide a gas partial pressure in the spray chamber of about 200 torr to about 400 torr during spraying to provide a deposit with reduced fissure porosity proximate said collector with a substantially uniform grain size through a thickness of said deposit, andcollecting the spray on the collector to build up a deposit forming an article.