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Journal of Materials Science

, Volume 42, Issue 7, pp 2222–2225 | Cite as

Nanocoating of Al2O3 additive on ZrO2 powder and its effect on the sintering behaviour in ZrO2 ceramic

  • R. F. GonçalvesEmail author
  • M. J. Godinho
  • E. R. Leite
  • A. P. Maciel
  • E. Longo
  • J. A. Varela
4th Brazilian MRS Meeting

Abstract

ZrO2 powder was coated with Al2O3 precursor generated by a polymeric precursor method in aqueous solution. The system of nanocoated particles formed a core shell-like structure in which the particle is the core and the nanocoating (additive) is the shell. A new approach is reported in order to control the superficial mass transport and the exaggerated grain growth during the sintering of zirconia powder. Transmission electron microscopy (TEM) observations clearly showed the formation of an alumina layer on the surface of the zirconia particles. This layer modifies the sintering process and retards the maximum shrinkage temperature of the pure zirconia.

Keywords

Aluminium Nitrate Amorphous Coating Polymeric Precursor Method Pure ZrO2 Shrinkage Temperature 
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.

Notes

Acknowledgements

The authors would like to express their gratitude to FAPESP, CNPQ, CAPES and FINEP for financial support of this work.

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • R. F. Gonçalves
    • 1
    Email author
  • M. J. Godinho
    • 1
  • E. R. Leite
    • 1
  • A. P. Maciel
    • 2
  • E. Longo
    • 3
  • J. A. Varela
    • 3
  1. 1.CMDMC/LIEC, Departamento de QuímicaUFSCarSão CarlosBrazil
  2. 2.Departamento de QuímicaUFMASão LuísBrazil
  3. 3.Instituto de Química, UNESPAraraquaraBrazil

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