Chapter 39. Impact of Thermal Exposure of EB–PVD TBCs on Youngs Modulus and Sintering

  1. Hau-Tay Lin and
  2. Mrityunjay Singh
  1. K. Fritscher1,
  2. F. Sziics2,
  3. U. Schulz1,
  4. B. Saruhan1,
  5. M. Peters1 and
  6. W. A. Kaysser1

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294758.ch39

26th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 23, Issue 4

26th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 23, Issue 4

How to Cite

Fritscher, K., Sziics, F., Schulz, U., Saruhan, B., Peters, M. and Kaysser, W. A. (2002) Impact of Thermal Exposure of EB–PVD TBCs on Youngs Modulus and Sintering, in 26th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 23, Issue 4 (eds H.-T. Lin and M. Singh), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294758.ch39

Author Information

  1. 1

    DLR German Aerospace Center, Institute of Materials Research, D–51170 Cologne, Germany

  2. 2

    Alstom Power AG, CH–5401 Baden, Switzerland

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2002

ISBN Information

Print ISBN: 9780470375792

Online ISBN: 9780470294758

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Keywords:

  • electron beam physical vaporization;
  • thermal barrier coatings;
  • sintering behavior;
  • columnar structure;
  • in-plane elastic modulus

Summary

Electron-beam physical vapor deposited (EB–PVD) thermal barrier coatings (TBCs) of partially yttria stabilized zirconia (PYSZ) on turbine airfoils are a promising approach to improve the overall economy of fuel dependent energy conversion systems. Essential properties are impaired in service. Sintering is mostly contributing to an increase in the Young's modulus and thermal conductivity. Future generation turbine blades require improved sinter resistant, stress tolerant, low thermal conductivity TBCs to battle these obstacles.

This paper presents the sintering behavior of EB–PVD TBCs on substrates and in-plane Young's modulus measurements versus temperature. Sintering is followed by BET gas adsorption. In-plane Young's moduli of TBC/substrate composites are determined by dynamic-mechanical analysis (DMA). The results are discussed with regard to substrate effects, influence of TBC microstructure and composition. The feasibility of alternative TBC compositions will be addressed.