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Journal of Materials Science

, Volume 29, Issue 24, pp 6434–6438 | Cite as

Inhibition of the formation of the B metastable phase in yttrium oxide plasma-spray coatings by the addition of zirconia

  • V. Gourlaouen
  • G. Schnedecker
  • M. Boncoeur
  • A. M. Lejus
  • R. Collongues
Papers

Abstract

Yttrium oxide plasma-spray deposits show a metastable B phase together with the cubic stable form. This B form is prejudicial for thermal applications of these coatings (i.e. weakens mechanical properties, etc.). Attempts have been made to avoid the formation of this metastable phase during the plasma-spraying operation by use of an inhibitor, such as ZrO2. A large solid solution with cubic C phase was found to form between ZrO2 and Y2O3 (Y1−xZrxO1.5 + x/2 □ 0.5 − /2). A method is described for preparing powders suitable for plasma spraying. Several compositions were tested. B phase is no longer formed for ZrO2 additions as low as x = 0.03. The influence of ZrO2 addition on Y2O3 coatings properties is discussed.

Keywords

Oxide Polymer Mechanical Property Zirconia Solid Solution 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • V. Gourlaouen
    • 1
    • 2
  • G. Schnedecker
    • 1
  • M. Boncoeur
    • 1
  • A. M. Lejus
    • 2
  • R. Collongues
    • 2
  1. 1.C.E.A. SaclayDTA/CEREM/DTM/SERCGif/Yvette CedexFrance
  2. 2.Laboratoire de Chimie Appliquée de I'Etat SolideURA 1466, ENSCPParis Cedex 05France

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