US 12,320,271 B2
Slurry based diffusion coatings for blade under platform of internally-cooled components and process therefor
Michael N. Task, Vernon, CT (US)
Assigned to RTX Corporation, Farmington, CT (US)
Filed by RTX Corporation, Farmington, CT (US)
Filed on Apr. 4, 2024, as Appl. No. 18/626,774.
Application 18/626,774 is a division of application No. 16/549,243, filed on Aug. 23, 2019, granted, now 11,970,953.
Prior Publication US 2024/0271531 A1, Aug. 15, 2024
Int. Cl. F01D 5/14 (2006.01); C23C 24/10 (2006.01)
CPC F01D 5/14 (2013.01) [C23C 24/106 (2013.01); F05D 2230/90 (2013.01); F05D 2300/121 (2013.01); F05D 2300/132 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method of coating a component, comprising:
applying an aluminizing slurry to a localized area of a component;
drying the aluminizing slurry;
heat treating the aluminizing slurry;
applying a chromizing slurry to the localized area of the component subsequent to heat treating the aluminizing slurry;
drying the chromizing slurry; and
heat treating the chromizing slurry so as to form a diffusion coating on the localized area of the component, the diffusion coating comprising an interdiffusion zone at an interface between the diffusion coating and the component, the diffusion coating further comprising a non-metallic inclusions zone adjacent to an outer surface of the diffusion coating, wherein the diffusion coating is a Cr-enriched γ-Ni based layer, and wherein the interdiffusion zone comprises elongated refractory element-rich particles, wherein Cr content and Al content are distributed through the diffusion coating such that a single diffusion coating layer contains the Cr content and the Al content.