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Meeting Materials Science & Technology 2017
Symposium Processing and Performance of Materials Using Microwaves, Electric and Magnetic Fields, Ultrasound, Lasers, and Mechanical Work – Rustum Roy Symposium
Presentation Title Electric Field-assisted Pressureless Sintering Zirconia-Scandia-Ceria Solid Electrolytes
Author(s) Reginaldo Muccillo, Eliana N.S. Muccillo
On-Site Speaker (Planned) Reginaldo Muccillo
Abstract Scope Electric field-assisted sintering experiments were carried out in ZrO<SUB>2</SUB>:10 mol% Sc<SUB>2</SUB>O<SUB>3</SUB>:1 mol% CeO<SUB>2</SUB> (10Sc1CeSZ). All experiments were conducted at 1050 <SUP>o</SUP>C during 2-5 min with application of 100-150 V cm<SUP>-1</SUP> AC electric field at 1 kHz with 1-4 A limiting current in specimens positioned inside a vertical dilatometer for simultaneous shrinkage monitoring. The specimens were green compacts as well as compacts pre-sintered at different temperatures. Shrinkage level, structural phases and grain morphology data were collected by dilatometry, X-ray diffraction and scanning electron microscopy analyses, respectively. For the same delivered electric power, the final shrinkage is higher for higher temperature of application of the electric field and for higher amplitude of the electric current pulses. Moreover, the results show that for higher porosity volume, the final densification of the flash sintered 10Sc1CeSZ samples is higher, showing that pores play a role as preferential path in the sintering mechanism of polycrystalline electroceramics.
Proceedings Inclusion? Undecided

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