Erosion resistant coating systems and processes therefor

摘要

A coating system and processes by which the coating system can be deposited on a surface region of a component to be resistant to erosion, and particularly resistant to erosion caused by high moisture content environments. The coating system includes a diffusion barrier layer, an intermediate layer overlying the diffusion barrier layer, and an outermost layer overlying the intermediate layer. The diffusion barrier layer is capable of inhibiting diffusion of damaging elements therethrough. The intermediate layer is an erosion-resistant material, having a hardness that is greater than the diffusion barrier layer, and being deposited by a near-net-shape laser deposition process. The outermost layer is erosion-resistant material, having a hardness that is greater that the hardness of the intermediate layer. The intermediate layer has a thickness of greater than the diffusion barrier layer and the outermost layer.

主权项

1. A process of forming a coating system on a component, the process comprising:
depositing a diffusion barrier layer on at least a surface region of the component, the diffusion barrier layer being capable of inhibiting diffusion of damaging elements therethrough; directly depositing an intermediate layer on the diffusion barrier layer, the intermediate layer comprising an erosion-resistant material, having a hardness that is greater than the diffusion barrier layer, and being deposited by a near-net-shape laser deposition process; and directly depositing an outermost layer on the intermediate layer, the outermost layer comprising an erosion-resistant material and having a hardness that is greater that the hardness of the intermediate layer; wherein the intermediate layer has a thickness of greater than the diffusion barrier layer and the outermost layer.