Sintering of translucent and single-phase nanostructured scandia-stabilized zirconia

Robson L. Grosso, Dereck N.F. Muche, Taeko Yonamine, Eliana N.S. Muccillo, Shen J. Dillon, Ricardo H.R. Castro

Research output: Contribution to journalArticlepeer-review

Abstract

Fully-dense and single-phase nanostructured scandia-stabilized zirconia specimens were produced by high-pressure spark plasma sintering technique. Nanocrystalline powders were prepared by the coprecipitation method. Green pellets were sintered at temperatures varying from 700 to 900 °C and pressures from 1.4 to 2 GPa, resulting in dense microstructures with single-phase fluorite-type cubic structure within a wide range of Sc2O3 content (6–15 mol%). The average grain size of sintered specimens ranged from 8 to 20 nm. Transmittance spectra confirm translucence in sintered specimens, which is consistent with full density. The results reported here reveal that the polymorphism challenge in the zirconia-scandia system can be successfully suppressed by this consolidation technique, which allows for controlling the grain size of bulk specimens.

Original languageEnglish (US)
Pages (from-to)246-249
Number of pages4
JournalMaterials Letters
Volume253
DOIs
StatePublished - Oct 15 2019

Keywords

  • Ceramics
  • Microstructure
  • Nanocrystalline materials
  • Phase stabilization
  • Sintering

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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