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

Journal Article · Thu Aug 10 04:00:00 EDT 2006 · Materials Research Bulletin

DOI:https://doi.org/10.1016/j.materresbull.2006.02.005· OSTI ID:20895246

Wattanasiriwech, Darunee ^[1]; Wattanasiriwech, Suthee ^[1]; Stevens, Ron ^[2]

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1. School of Science, Mae Fah Luang University, Chiangrai 57100 (Thailand)
2. Department of Engineering and Applied Science, University of Bath (United Kingdom)

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 {sup {yields}} 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.

• OSTI ID: 20895246
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 8 Vol. 41; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CERAMICS
CRYSTALS
FABRICATION
MONOCLINIC LATTICES
NANOSTRUCTURES
PARTICLE SIZE
PHASE TRANSFORMATIONS
POWDERS
SOL-GEL PROCESS
SOLS
SURFACE AREA
THERMAL GRAVIMETRIC ANALYSIS
X-RAY DIFFRACTION
YTTRIUM OXIDES
ZIRCONIUM OXIDES