Verfahren zum Auftragen einer Wärmesperre auf ein Metallischer Gegenstand

Details

Veröffentlichungs-Nr.

EP2998417

Aktenzeichen

EP15182450

Anmeldetag

26. August 2015

Veröffentlichung

24. Juli 2019

Erteilung

24. Juli 2019

Rechtsraum

EP

IPC

C25D7/00C23C14/08C23C14/30C23C28/00F01D5/28C23C4/11C25D5/50B23K15/00B23K26/00B23K26/08C22F1/00C22F1/10B23K26/354B23K26/352

Abstract

A thermal barrier coated metallic article (26) comprises a platinum-group metal enriched outer layer (38) on the metallic article (26). The surface of the platinum-group metal enriched outer layer (38) on the metallic article (26) has a microstructure comprising a plurality of projections (39) extending away from the metallic article (26). A thin adherent layer of oxide (40) is formed on the platinum-group metal enriched outer layer (38) of the metallic article (26). A ceramic coating (42) is provided on the oxide layer (40) on the surface on and around the projections (39). The ceramic coating (42) comprises a plurality of columnar ceramic grains (41) which extend through the full thickness of the ceramic coating (42). The columnar ceramic grains (41) extending from the projections (39) are arranged in clusters (45) separated by gaps (47). The columnar ceramic grains (43) deposited around the projections (39) are generally blocked. The projections (39) reduce the stress in the ceramic coating (42) near the interface with the adherent layer of oxide (40) and also reduce the stress in the adherent layer of oxide (40) and hence increase the working life of the thermal barrier coating system.

Anmelder

Firma

Rolls-Royce plc

Land

🇬🇧 Großbritannien

Fachgebiete