Activation of mass transfer processes at spark plasma sintering of zirconium dioxide

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1 Citation (Scopus)

Abstract

The paper presents the results of numerical simulation of thermal and electric fields' distribution in the graphite moulding tool and in the sintered sample of ZrO2-4%Y2O3 in the course of spark plasma sintering (SPS). The reduction of SPS duration is accounted for the largeness of specific thermal flux towards the sample surface, emitted by the graphite moulding tool. The impact of the electric field on the sample structure leads to emergence of the polarizing processes forcing zirconium ions to shift from lattice sites, which is able to reduce the required value of thermal energy necessary for initiation of a diffusion process. The axial pressure at high temperatures of sintering can lead to plastic deformation of the powder particles.

Original languageEnglish
Article number012042
JournalIOP Conference Series: Materials Science and Engineering
Volume124
Issue number1
DOIs
Publication statusPublished - 2 Jun 2016

Fingerprint

Spark plasma sintering
Graphite
Zirconium
Molding
Mass transfer
Chemical activation
Electric fields
Thermal energy
Powders
Plastic deformation
Sintering
Ions
Fluxes
Computer simulation
Temperature
Hot Temperature
zirconium oxide

ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)

Cite this

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AB - The paper presents the results of numerical simulation of thermal and electric fields' distribution in the graphite moulding tool and in the sintered sample of ZrO2-4%Y2O3 in the course of spark plasma sintering (SPS). The reduction of SPS duration is accounted for the largeness of specific thermal flux towards the sample surface, emitted by the graphite moulding tool. The impact of the electric field on the sample structure leads to emergence of the polarizing processes forcing zirconium ions to shift from lattice sites, which is able to reduce the required value of thermal energy necessary for initiation of a diffusion process. The axial pressure at high temperatures of sintering can lead to plastic deformation of the powder particles.

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