An experimental setup for shrinkage evaluation during electric field-assisted flash sintering: Application to yttria-stabilized zirconia

Journal of the European Ceramic Society Volume: 33 Issue: 3 Pages: 515-520 Published: 2013

Sketch of the experimentalsetup for dilatometric measurements, application of voltage (Vac) and impedance spectroscopy data collection (Z) of green ceramic pellets. LVDT: linear variable differential transformer; TC: Pt-Pt10%Rh thermocouple; ΔL: linear shrinkage.

Writers: R. Muccillo, E. N. S. Muccillo

Keywords: Flash-sinteringDilatometryImpedance spectroscopyFEG-SEMYttria-stabilized zirconia

Abstract: Analyses of electrochemical impedance spectroscopy plots and dilatometric curves of ZrO2:Y2O3 (YSZ) green compacts upon sintering show the possibility of choosing the shrinkage level of the green pellet by passing a current flash through the interparticle regions. The experiments consisted on inserting a YSZ green compact in a dilatometer sample holder, connecting either to a power supply or to an impedance analyzer, and monitoring the shrinkage upon sintering with and without applying an ac voltage in the 800–1000 ◦C temperature range. This procedure allows taking the sample from the first to the second sintering stage in few seconds without the occurrence of significant grain growth.

See PDF: An experimental setup for shrinkage evaluation during electric field-assisted flash sintering – Application to yttria-stabilized zirconia

DOI: 10.1016/j.jeurceramsoc.2012.09.020

Rose Portasio
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Assessora Administrativa no LIEC - IQ/Unesp