Densification kinetics of nanocrystalline zirconia powder using microwave and spark plasma sintering - A comparative study

Oleg Vasylkiv, Dmytro Demirskyi, Yoshio Sakka, Andrey Ragulya, Hanna Borodianska

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Two-stage densification process of nanosized 3 mol% yttria-stabilized zirconia (3Y-SZ) polycrystalline compacts during consolidation via microwave and spark-plasma sintering have been observed. The values of activation energies obtained for microwave and spark-plasma sintering 260-275 kJ·mol ?1 are quite similar to that of conventional sintering of zirconia, suggesting that densification during initial stage is controlled by the grain-boundary diffusion mechanism. The sintering behavior during microwave sintering was significantly affected by preliminary pressing conditions, as the surface diffusion mechanism (230 kJ · mol ?1) is active in case of cold-isostatic pressing procedure was applied.

Original languageEnglish
Pages (from-to)4577-4582
Number of pages6
JournalJournal of Nanoscience and Nanotechnology
Volume12
Issue number6
DOIs
Publication statusPublished - 2012 Jul 23
Externally publishedYes

Keywords

  • Ceramics
  • Microwave Processing
  • Sintering
  • SPS
  • Zirconia

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics

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