초록 ▼

A method of forming a multilayer ceramic coating system on a substrate that requires thermal protection from a hostile thermal environment. The method generally entails forming at least one tape that contains ceramic particles dispersed in an organic constituent, such as a binder and/or plasticizer.

A method of forming a multilayer ceramic coating system on a substrate that requires thermal protection from a hostile thermal environment. The method generally entails forming at least one tape that contains ceramic particles dispersed in an organic constituent, such as a binder and/or plasticizer. If a single tape is used, the tape is formed of multiple layers of different compositions and applied as a unit to the substrate, thereby forming at least an innermost layer and an outermost layer on the substrate. If multiple tapes are used, a first tape is applied to the substrate to form the innermost layer, and a second tape is applied to form the outermost layer. The tape/tapes are then sintered to form innermost and outermost ceramic layers, respectively, on the substrate. The tape/tapes are formed and processed such that the innermost ceramic layer has submicron voids to provide a desired level of porosity, while the outermost ceramic layer is thinner, smoother and less porous than the innermost ceramic layer.

대표청구항 ▼

1. A method of forming a multilayer ceramic coating system on a gas turbine engine component, the method comprising the steps of:applying at least one tape to a surface of the component so as to form a multilayer structure comprising an innermost layer contacting the surface and an outermost layer m

1. A method of forming a multilayer ceramic coating system on a gas turbine engine component, the method comprising the steps of:applying at least one tape to a surface of the component so as to form a multilayer structure comprising an innermost layer contacting the surface and an outermost layer most remote from the surface, each of the innermost layer and the outermost layer comprising ceramic particles dispersed in at least one organic constituent; and sintering the multilayer structure to burn off the at least one organic constituent and form innermost and outermost ceramic layers on the surface, the innermost ceramic layer having submicron voids therein, the outermost ceramic layer being thinner, smoother and less porous than the innermost ceramic layer.