Chapter 42. Experimental Study of Ceramic-Coated Tip Seals for Turbojet Engines

  1. William Smothers
  1. T. J. Biesiadny1,
  2. G. A. Klann2,
  3. E. S. Lassow3,
  4. M. McHenry4,
  5. G. McDonald5 and
  6. R. C. Hendricks5

Published Online: 26 MAR 2008

DOI: 10.1002/9780470320280.ch42

Proceedings of the 9th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 6, Issue 7/8

Proceedings of the 9th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 6, Issue 7/8

How to Cite

Biesiadny, T. J., Klann, G. A., Lassow, E. S., McHenry, M., McDonald, G. and Hendricks, R. C. (1985) Experimental Study of Ceramic-Coated Tip Seals for Turbojet Engines, in Proceedings of the 9th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 6, Issue 7/8 (ed W. Smothers), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470320280.ch42

Author Information

  1. 1

    NASA Lewis Research Center Cleveland, OH 44135

  2. 2

    Propulsion Laboratory AVSCOM Research and Technology Laboratories Lewis Research Center, Cleveland, OH 44135

  3. 3

    Howmet Corp., Whitehall, MI 49461

  4. 4

    U.S. Army Aviation Logistics School Fort Eustis, VA 23604

  5. 5

    NASA Lewis Research Center Cleveland, OH 44135

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1985

ISBN Information

Print ISBN: 9780470374337

Online ISBN: 9780470320280

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Keywords:

  • ceramic gas-path;
  • turboshaft engine;
  • plasma-spray;
  • ceramic replacement;
  • turbojet

Summary

Ceramic gas-path seals were fabricated and succesfully 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 NiCoCrAIX bond coat 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.