Experimental study of ceramic coated tip seals for turbojet engines
Abstract
Ceramic gas-path seals were fabricated and successfully operated over 1000 cycles from flight idle to maximum power in a small turboshaft engine. The seals were fabricated by plasma spraying zirconia over a NiCoCrAlX bond boat on the Haynes 25 substrate. Coolant-side substrate temperatures and related engine parameters were recorded. Post-test inspection revealed mudflat surface cracking with penetration to the ceramic bond-coat interface.
- Publication:
-
Presented at the 9th Ann. Conf. on Composites and Advan. Ceram. Mater
- Pub Date:
- 1985
- Bibcode:
- 1985cacm.conf...20B
- Keywords:
-
- Ceramics;
- Heat Transfer;
- Seals (Stoppers);
- Turbojet Engines;
- Ceramic Coatings;
- Plasma Spraying;
- Sprayed Coatings;
- Surface Cracks;
- Zirconium Oxides;
- Fluid Mechanics and Heat Transfer