Patent ID: 6042898
Filing Date: 2000-03-28
Classification: C23C,Y02T

Abstract:
A method for applying a thermal barrier coating, comprising the steps of:a. depositing a MCrAIY bond coat onto a superalloy substrate, wherein M stands for Ni, Co, Fe, or a mixture of Ni and Co;b. removing undesired oxides and contaminants from the MCrAIY bond coat with an ionized gas stream cleaning process by placing the MCrAIY-coated substrate into a vacuum chamber, reducing the pressure inside the vacuum chamber, flowing an inert gas into the vacuum chamber, and striking and maintaining an arc between the MCrAIY-coated substrate and an electrode;c. forming an adherent aluminum oxide scale on the MCrAIY bond coat; andd. depositing a ceramic layer having a columnar structure on the aluminum oxide scale by physical vapor deposition.