초록 ▼

A thermal barrier coating may be applied by depositing a MCrAIY bond coat onto a superalloy substrate, wherein M stands for Ni, Co, Fe, or a mixture of Ni and Co. Undesired oxides and contaminants are removed from the MCrAIY bond coat with an ionized gas stream cleaning process, such as a reverse tr

A thermal barrier coating may be applied by depositing a MCrAIY bond coat onto a superalloy substrate, wherein M stands for Ni, Co, Fe, or a mixture of Ni and Co. Undesired oxides and contaminants are removed from the MCrAIY bond coat with an ionized gas stream cleaning process, such as a reverse transfer arc process. An adherent aluminum oxide scale is formed on the MCrAIY bond coat and a ceramic layer is deposited on the aluminum oxide scale by physical vapor deposition to form a columnar structure.

대표청구항 ▼

[ We claim:] [1.] 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

[ We claim:] [1.] 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.