A sol-powder coating technique for fabrication of yttria stabilised zirconia

D Wattanasiriwech, S Wattanasiriwech, R Stevens

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Yttria stabilised zirconia has been prepared using a simple sol-powder coating technique. The polymeric yttria sol, which was prepared using 1,3 propanediol as a network modifier, was homogeneously mixed with nanocrystalline zirconia powder and it showed a dual function: as a binder which promoted densification and a phase modifier which stabilised zirconia in the tetragonal and cubic phases. Thermal analysis and X-ray diffraction revealed that the polymeric yttria sol which decomposed at low temperature into yttrium oxide could change the m --> t phase transformation behaviour of the zirconia, possibly due to the small particle size and very high surface area of both yttria and zirconia particles allowing rapid alloying. The sintered samples exhibited three crystalline phases: monoclinic, tetragonal and cubic, in which cubic and tetragonal are the major phases. The weight fractions of the individual phases present in the selected specimens were determined using quantitative Rietveld analysis. (C) 2006 Elsevier Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)1437-1446
Number of pages10
JournalMaterials Research Bulletin
Volume41
Issue number8
DOIs
Publication statusPublished - 2006

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