Journal of Thermal Spray Technology

, Volume 18, Issue 2, pp 187–193

Application of Plasma-Sprayed Complex Perovskites as Thermal Barrier Coatings

  • Maria Ophelia Jarligo
  • Daniel Emil Mack
  • Robert Vassen
  • Detlev Stöver
Peer Reviewed

DOI: 10.1007/s11666-009-9302-9

Cite this article as:
Jarligo, M.O., Mack, D.E., Vassen, R. et al. J Therm Spray Tech (2009) 18: 187. doi:10.1007/s11666-009-9302-9

In an effort to improve the performance of heat engines at high temperatures, advanced surface coatings have been developed from complex perovskites. Materials of Ba(Mg1/3Ta2/3)O3 and La(Al1/4Mg1/2Ta1/4)O3 composition were synthesized and applied as ceramic topcoats of thermal barrier coating (TBC) systems by atmospheric plasma spraying (APS) in single layer and in double-layer combination with conventional yttria stabilized zirconia (YSZ). Microstructural and phase analyses reveal that plasma spraying of complex perovskites is accompanied with the formation of vertical crack networks and secondary oxide phases which influence the failure mechanism of the TBCs. The low value of fracture toughness for the complex perovskites and the thermally grown oxide at the topcoat-bondcoat interface of the TBCs are, however, the major factors which lead to the coating failure on thermal cycling at about 1250 °C.

Keywords

atmospheric plasma spraying coating properties complex perovskite thermal barrier coating (TBC) thermal cycling 

Copyright information

© ASM International 2009

Authors and Affiliations

  • Maria Ophelia Jarligo
    • 1
  • Daniel Emil Mack
    • 1
  • Robert Vassen
    • 1
  • Detlev Stöver
    • 1
  1. 1.Institut für Energieforschung (IEF-1), Forschungszentrum Jülich GmbHJuelichGermany

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