US 11,725,268 B2
Method to increase the thermal stress capability of a porous ceramic coating and a layer system
Peter Stuart Hollingsworth, Dortmund (DE); Alexandr Sadovoy, Berlin (DE); and Dimitrios Zois, Berlin (DE)
Assigned to Siemens Energy Global GmbH & Co. KG, Bayern (DE)
Appl. No. 17/282,295
Filed by Siemens Energy Global GmbH & Co. KG, Bayern (DE)
PCT Filed Jun. 14, 2019, PCT No. PCT/EP2019/065656
§ 371(c)(1), (2) Date Apr. 1, 2021,
PCT Pub. No. WO2020/074139, PCT Pub. Date Apr. 16, 2020.
Claims priority of application No. 8200072 (EP), filed on Oct. 12, 2018.
Prior Publication US 2021/0340677 A1, Nov. 4, 2021
Int. Cl. C23C 28/00 (2006.01); C23C 4/18 (2006.01); C23C 4/134 (2016.01); C04B 38/00 (2006.01); C04B 41/00 (2006.01); C23C 4/02 (2006.01); C23C 4/11 (2016.01)
CPC C23C 4/18 (2013.01) [C04B 38/0074 (2013.01); C04B 41/0081 (2013.01); C23C 4/02 (2013.01); C23C 4/11 (2016.01); C23C 4/134 (2016.01)] 20 Claims
OG exemplary drawing
 
1. A method to produce cracks into a porous ceramic coating in order to increase a thermal stress capability of the ceramic coating, the method comprising:
coating or providing a component with a porous ceramic coating, wherein the ceramic coating shows no or almost no vertical microcracks, wherein the component comprises a substrate and a bond coat, and the ceramic coating is on the bond coat,
heating up in a first step an outer surface of the ceramic coating to form a sintered rim of the ceramic coating that defines the outer surface of the ceramic coating, and
force cooling in a final step the sintered rim and the ceramic coating to produce vertical cracks in the sintered rim.