9. Lanthanum-Lithium Hexaaluminate—A New Material for Thermal Barrier Coatings in Magnetoplumbite Structure—Material and Process Development

  1. Dongming Zhu,
  2. Uwe Schulz,
  3. Andrew Wereszczak and
  4. Edgar Lara-Curzio
  1. Gerhard Pracht,
  2. Robert Vaßen and
  3. Detlev Stöver

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291320.ch9

Advanced Ceramic Coatings and Interfaces: Ceramic Engineering and Science Proceedings, Volume 27, Issue 3

Advanced Ceramic Coatings and Interfaces: Ceramic Engineering and Science Proceedings, Volume 27, Issue 3

How to Cite

Pracht, G., Vaßen, R. and Stöver, D. (2006) Lanthanum-Lithium Hexaaluminate—A New Material for Thermal Barrier Coatings in Magnetoplumbite Structure—Material and Process Development, in Advanced Ceramic Coatings and Interfaces: Ceramic Engineering and Science Proceedings, Volume 27, Issue 3 (eds D. Zhu, U. Schulz, A. Wereszczak and E. Lara-Curzio), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291320.ch9

Author Information

  1. Forschungszentrum Jülich GmbH, Institute for Materials and Processes in Energy Systems 1, Jülich, Germany, D-52425 Jülich

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2006

ISBN Information

Print ISBN: 9780470080535

Online ISBN: 9780470291320

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Keywords:

  • TGO;
  • CE;
  • temperature sets;
  • magnetoplumbite structural;
  • zirconium and yttrium

Summary

The first study on a new material composition for thermal barrier coating applications is presented. The new material has the chemical composition LaLiAl11O18.5 and belongs to the group of hexaaluminate compounds. It is comparable to LaMgAl11O19, which has been discussed for TBC application for some years. The preparation and characterization of the composition as well as first plasma spraying experiments will be described. In particular, the thermal expansion mismatch of the ceramic coating on a steel substrate is discussed which leads to strong segmentation cracks of the plasma-sprayed and heat-treated coating. The substitution of lithium in the structure supported the segmentation process of the coating.