US 12,330,991 B2
Turbine engine abradable systems
Christopher W. Strock, Boothbay Harbor, ME (US); and Kevin C. Seymour, Riviera Beach, FL (US)
Assigned to RTX Corporation, Farmington, CT (US)
Appl. No. 18/283,882
Filed by RTX Corporation, Farmington, CT (US)
PCT Filed Mar. 24, 2022, PCT No. PCT/US2022/021678
§ 371(c)(1), (2) Date Sep. 25, 2023,
PCT Pub. No. WO2022/204367, PCT Pub. Date Sep. 29, 2022.
Application 18/283,882 is a continuation in part of application No. 17/760,936, previously published as PCT/US2020/021567, filed on Mar. 6, 2020.
Claims priority of provisional application 63/320,938, filed on Mar. 17, 2022.
Claims priority of provisional application 63/165,505, filed on Mar. 24, 2021.
Claims priority of provisional application 62/903,295, filed on Sep. 20, 2019.
Prior Publication US 2024/0158303 A1, May 16, 2024
Int. Cl. C04B 35/46 (2006.01); C04B 35/10 (2006.01); C04B 35/16 (2006.01); C04B 35/48 (2006.01); C04B 35/583 (2006.01); C23C 4/10 (2016.01); C23C 4/12 (2016.01); C23C 4/18 (2006.01); F01D 11/12 (2006.01)
CPC C04B 35/46 (2013.01) [C04B 35/10 (2013.01); C04B 35/16 (2013.01); C04B 35/48 (2013.01); C04B 35/583 (2013.01); C23C 4/10 (2013.01); C23C 4/12 (2013.01); C23C 4/18 (2013.01); C04B 2235/3217 (2013.01); C04B 2235/3237 (2013.01); C04B 2235/3244 (2013.01); C04B 2235/3445 (2013.01); C04B 2235/3463 (2013.01); C04B 2235/349 (2013.01); C04B 2235/386 (2013.01); C04B 2235/767 (2013.01); F01D 11/122 (2013.01); F05D 2230/90 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for forming an abradable material, the abradable material comprising:
at least 20% by volume rutile titania; and
hBN,
the method comprising:
blending a first titania powder having an oxygen debit of at least 5.0% with a second titania powder having an oxygen debit, if any, of less than 1.0%;
thermal spraying the blend; and
oxidizing the sprayed blend,
wherein oxygen debit in an oxide of an element is measured relative to a fully oxidized element.