US 12,291,971 B1
Blade outer air seal with graded coating
Juan Gomez, El Paso, TX (US); and Nizar Zahed, Glastonbury, CT (US)
Assigned to RTX CORPORATION, Farmington, CT (US)
Filed by RTX CORPORATION, Farmington, CT (US)
Filed on Feb. 13, 2024, as Appl. No. 18/440,550.
Int. Cl. F01D 11/12 (2006.01)
CPC F01D 11/122 (2013.01) [F05D 2220/32 (2013.01); F05D 2230/31 (2013.01); F05D 2240/55 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A blade outer air seal, comprising:
a center web having a radially inner face and a radially outer face;
at least one mounting arm extending from the radially outer face;
a graded coating disposed on the radially inner face, the graded coating being graded by having an abradable component in a first region and a protective component in a second region, and wherein the abradable component has a higher porosity than the protective component;
the porosity of the abradable component is between 20% and 60%;
wherein the porosity of the protective component is between 5% and 20%; and
wherein the second region includes a first subregion and a second subregion, the first region is between the first and second subregions, and wherein the first region has a first thickness and the first and second subregions each have a second thickness that is greater than the first thickness such that a recess is provided over the first region between the first and second subregions, and the protective component is single-layered.