US 12,247,491 B2
Abradable coating
Guillaume Fradet, Moissy-Cramayel (FR); Laurent Paul Dudon, Moissy-Cramayel (FR); and Serge Georges Vladimir Selezneff, Moissy-Cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 17/630,031
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR)
PCT Filed Jul. 22, 2020, PCT No. PCT/FR2020/051333
§ 371(c)(1), (2) Date Jan. 25, 2022,
PCT Pub. No. WO2021/019154, PCT Pub. Date Feb. 4, 2021.
Claims priority of application No. 19 08492 (FR), filed on Jul. 26, 2019.
Prior Publication US 2022/0282633 A1, Sep. 8, 2022
Int. Cl. F01D 11/12 (2006.01); C23C 4/04 (2006.01); C23C 4/129 (2016.01)
CPC F01D 11/122 (2013.01) [C23C 4/04 (2013.01); C23C 4/129 (2016.01); F05D 2230/311 (2013.01); F05D 2300/611 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An abradable track suitable for a turbomachine, the abradable track comprising:
a substrate; and
abradable coating, provided on the substrate;
wherein the abradable coating comprises, in a content of greater than 95 vol. %, Ca10(PO4)6(OH)2, LaPO4, or diatomaceous earth, and
wherein the abradable coating has a surface roughness Ra of less than 3 μm.