航空發(fā)動機葉片熱障涂層技術(shù)aircraft_enginer_tbc_benchmark-文庫吧
2025-04-17 02:58 本頁面
【正文】 emperature vs. Lifetime 7 / Confidential/ 5/30/2022 TBC Structure amp。 Failure Layer Function Requirement t/181。m Material Technique TBC top coat Thermally insulating Low k, high CTE, porous morphology 100~ 400 YSZ APS, EBPVD TGO Oxidation resistance Dense alumina 110 Al2O3 Bond Coat Aluminide, Solid adhesion, transition Gradient layer, Phase stability 50100 NiAl PtAl MCrAlY CVD,PackCem Plating, CVD VPS,HVOF,EB ? Rupture: CTE mismatch, sharp thermal gradient, thermomechanical cycling ? Delamination: TGO, degradation of bond coating, ? Incipient crack nucleateamp。grow: thermomechanical fatigue ? Inclusion: Processing method derived ? FOD(foreign object damage), CMAS(Calcia, Magnesia, Alumina and Silica) 8 / Confidential/ 5/30/2022 EBPVD Advantages ?Strong adherence, wear resistance ?Dense, atom/ion evaporation ?Columnar grain Drawbacks ?High temp ?Vacuum ?High cost Applications ?Topcoat/MCrAlY ?Tool coating ?Functional film 9 / Confidential/ 5/30/2022 Plasma Spraying Advantages ?Lamellar strip ?Low k ?Composition control ?Thickness capability Drawbacks ?Partially melted particle ?Cracks ?Porosities Applications ?Topcoat APS ?Bond coat LPPS ?Corrosion/Wear resistance 10 / Confidential/ 5/30/2022 Front Runners U S A U C S B * N o v e l T B C m a t e r i a l , m i c r o s t r u c t u r eU S A U n i v o f C o n n e c t i c u t * S p a l l a t i o n m o d e l , l i f e t i m e p r e
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