US 11,719,105 B2
Process for location-specific slurry based coatings for internally-cooled component
Michael N. Task, Vernon, CT (US); Xuan Liu, Glastonbury, CT (US); Russell A. Beers, Manchester, CT (US); and Kevin W. Schlichting, South Glastonbury, CT (US)
Assigned to Raytheon Technologies Corporation, Farmington, CT (US)
Filed by Raytheon Technologies Corporation, Farmington, CT (US)
Filed on Feb. 10, 2021, as Appl. No. 17/172,746.
Application 17/172,746 is a division of application No. 15/923,432, filed on Mar. 16, 2018, abandoned.
Prior Publication US 2021/0164353 A1, Jun. 3, 2021
Int. Cl. C23C 16/06 (2006.01); F01D 5/28 (2006.01); C23C 2/04 (2006.01); C23C 16/04 (2006.01); F01D 5/18 (2006.01); C23C 28/02 (2006.01); C23C 10/08 (2006.01); C23C 10/24 (2006.01)
CPC F01D 5/288 (2013.01) [C23C 2/04 (2013.01); C23C 10/08 (2013.01); C23C 10/24 (2013.01); C23C 16/045 (2013.01); C23C 16/06 (2013.01); C23C 28/021 (2013.01); F01D 5/187 (2013.01); F05D 2220/32 (2013.01); F05D 2230/90 (2013.01); F05D 2300/132 (2013.01); F05D 2300/611 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method of coating a turbine blade having an array of internal passageways that extend from a root to an airfoil, the method comprising:
aluminizing the array of internal passageways within the turbine blade; and
chromizing a portion of the array of internal passageways after aluminizing the array of internal passageways only up to a demarcation located at 20%-30% of an airfoil span of the turbine blade from the root such that an outer layer inboard of the demarcation of the array of internal passageways is converted to either Cr-rich gamma-Ni solid solution or gamma+alpha-Cr upon chromizing such that an aluminized section outboard of the demarcation and a chromized section inboard of the demarcation are about equal in thickness.