US 12,110,799 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. 17/904,264
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR)
PCT Filed Feb. 15, 2021, PCT No. PCT/FR2021/050262
§ 371(c)(1), (2) Date Aug. 15, 2022,
PCT Pub. No. WO2021/170933, PCT Pub. Date Sep. 2, 2021.
Claims priority of application No. 2001836 (FR), filed on Feb. 25, 2020.
Prior Publication US 2023/0089114 A1, Mar. 23, 2023
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 2230/90 (2013.01); F05D 2300/611 (2013.01)] 24 Claims
OG exemplary drawing
 
1. An abradable coating for a turbomachine, comprising:
a mineral compound, the Mohs hardness of which is less than or equal to 6 and the melting temperature of which is greater than 450° C., and
a polymeric compound, with a content of between 40% and 70% by volume of the abradable coating,
wherein the mineral compound is selected from: calcium fluoride, hydroxyapatite, lanthanum phosphate, diatomite, muscovite or barium sulfate, and
wherein the porosity is less than 5%.