Flash sintering scaling-up challenges: Influence of the sample size on the microstructure and onset temperature of the flash event

Author(s)

Campos, V, Joao ; Lavagnini, Isabela R. ^[1] ; Pereira da Silva, Joao G. ^[2] ; Ferreira, Julieta A. ^[1] ; Sousa, V, Rafael ; Muecke, Robert ^[2] ; Guillon, Olivier ^[2] ; Pallone, Eliria M. J. A. ^[3]

Affiliation

^[1] Campos, Joao, V, Univ Sao Paulo, Dept Engn Biossistemas, USP, AV Duque Caxias Norte 225, Pirassununga, SP - Brazil

^[2] Forschungszentrum Julich, Inst Energy & Climate Res Mat Synth & Proc IEK 1, D-52425 Julich - Germany

^[3] Sousa, Rafael, V, Campos, Joao, V, Univ Sao Paulo, Dept Engn Biossistemas, USP, AV Duque Caxias Norte 225, Pirassununga, SP - Brazil

• Document type: Journal article
• Source: SCRIPTA MATERIALIA; v. 186, p. 1-5, SEP 2020.
• Web of Science Citations: 0

Abstract

The influence of sample size on microstructure, density, and onset temperature of the flash event was investigated for 3 mol% yttria-stabilised zirconia (3YSZ). Pellet samples with different height and constant diameter were flash sintered under an AC electric field. The larger the samples were, the lower was their flash onset temperature. Furthermore, a more heterogeneous microstructure was verified on larger samples followed by lower density. The influence of the samples' height on the thermal runaway and the thermal gradient within the samples are discussed as responsible for these effects. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 18/04331-5 - Instrumentation and automation of a furnace adapted to flash sintering
• Grantee: João Vitor Campos
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
• FAPESP's process: 15/07319-8 - Study ultra rapid sintering and low energy consumption: flash Sintering
• Grantee: Eliria Maria de Jesus Agnolon Pallone
• Support Opportunities: Regular Research Grants