US 12,215,427 B2
Erosion and CMAS resistant coating for protecting EBC and CMC layers and thermal spray coating method
Dianying Chen, Westbury, NY (US); and Chris Dambra, Greenlawn, NY (US)
Assigned to OERLIKON METCO (US) INC., Westbury, NY (US)
Appl. No. 16/954,741
Filed by OERLIKON METCO (US) INC., Westbury, NY (US)
PCT Filed Dec. 18, 2018, PCT No. PCT/US2018/066239
§ 371(c)(1), (2) Date Jun. 17, 2020,
PCT Pub. No. WO2019/126174, PCT Pub. Date Jun. 27, 2019.
Claims priority of provisional application 62/607,514, filed on Dec. 19, 2017.
Prior Publication US 2021/0087695 A1, Mar. 25, 2021
Int. Cl. C23C 28/04 (2006.01); C23C 4/11 (2016.01); C23C 4/134 (2016.01); C23C 14/08 (2006.01); C23C 28/00 (2006.01); F01D 5/28 (2006.01)
CPC C23C 28/042 (2013.01) [C23C 4/11 (2016.01); C23C 4/134 (2016.01); C23C 14/083 (2013.01); C23C 28/321 (2013.01); C23C 28/3455 (2013.01); F01D 5/288 (2013.01)] 29 Claims
OG exemplary drawing
 
1. An erosion and calcium-magnesium-aluminum-silicate (CMAS) resistant coating arranged on an environmental barrier coating (EBC) coated substrate, in which at least one bond coating layer is disposed between the EBC and the substrate, the erosion and CMAS resistant coating comprising:
at least one porous vertically cracked (PVC) coating layer providing CTE mitigation and being disposed over the EBC coated substrate, the substrate comprising a ceramic matrix composite (CMC); and
at least one dense vertically cracked (DVC) erosion and CMAS resistant coating layer deposited over the at least one PVC coating layer,
wherein a porosity of the at least one DVC erosion and CMAS resistant coating is 0% to 5%, and
wherein a porosity of the at least one PVC coating layer is 5% to 25%.