Journal of Materials Science

, Volume 31, Issue 23, pp 6325–6332

A simple method for the preparation of plasma-sprayable powders based on ZrO2

  • Parvati Ramaswamy
  • S. Seetharamu
  • K. B. R. Varma
  • K. J. Rao
Article

DOI: 10.1007/BF00354456

Cite this article as:
Ramaswamy, P., Seetharamu, S., Varma, K.B.R. et al. JOURNAL OF MATERIALS SCIENCE (1996) 31: 6325. doi:10.1007/BF00354456

Abstract

Plasma-sprayable powders of calcia, magnesia and yttria-stabilized zirconia have been prepared by using polyvinyl alcohol binders. The powders have been characterized for sprayability by spray coating on steel plates previously coated with an NiAl bond coat. The suitability of these coatings for thermal barrier applications have been examined. Thermal barrier and related properties, along with phase stability and mechanical properties, have been found to be good. Failure of the thermal barrier coating has been observed to occur at the interface between the bond coat and the substrate, due to the formation of a pile-up layer consisting of Fe-Zr-Al-O compound.

Copyright information

© Chapman & Hall 1996

Authors and Affiliations

  • Parvati Ramaswamy
    • 1
  • S. Seetharamu
    • 1
  • K. B. R. Varma
    • 2
  • K. J. Rao
    • 2
  1. 1.Materials Technology DivisionCentral Power Research InstituteBangaloreIndia
  2. 2.Materials Research CentreIndian Institute of ScienceBangaloreIndia