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Partial discharge measurements used as a tool to assess the quality of the electrode contact in flash sintering, Milko Borisov Memorial Lecture
Fagnard, Jean-François; Gajdowski, Caroline; Boilet, Laurent et al.
202021st International school on condensed matter physics “Progress and Perspectives in Functional Materials”
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Keywords :
Partial discharge; electrical measurements; flash sintering
Abstract :
[en] The measurement of phase-resolved partial discharge patterns is a well-established technique used in electrical engineering to study the degradation of electrically insulating materials placed at high voltage. The measured partial discharge (PD) signal gives information on the physics of the pre-breakdown mechanisms that may appear in this regime. In this talk, we show how this technique can also be applied to ceramics to better understand the so-called 'flash sintering' process, i.e. the sintering of ceramics under an applied electric field. We first recall the concept of phase-resolved partial discharge measurements and give details on the experimental system that was used to record simultaneously the partial discharge and the AC current. We then show results obtained on 3%mol yttria-stabilized zirconia (3YSZ) samples placed between planar electrodes and subjected to high electric fields up to 3.2 kV/cm [1]. The partial discharge signal is found to be much sensitive to quality of the contact between the platinum electrodes and the sample. The surface microstructure of the samples subjected to PD experiments exhibits various characteristics similar to those observed during dielectric breakdown. Reference : [1] J.-F. Fagnard et al. https://doi.org/10.1016/j.jeurceramsoc.2020.07.046 Use of partial discharge patterns to assess the quality of sample/electrode contacts in flash sintering, J Eur. Ceram. Soc. volume 41, January 2021, pp. 669-683 Acknowledgements: This study is supported by ERDF and the Walloon Region, in the frame of IMAWA – FLASHSINT research project (program 2014-2020). The authors thank M. Vedi Dupont from BCRC for the SEM observations.
Research center :
SUPRATECS - Services Universitaires pour la Recherche et les Applications Technologiques de Matériaux Électro-Céramiques, Composites, Supraconducteurs - ULiège
Montefiore Institute - Montefiore Institute of Electrical Engineering and Computer Science - ULiège
Disciplines :
Electrical & electronics engineering
Physics
Author, co-author :
Fagnard, Jean-François  ;  Université de Liège - ULiège > Montefiore Institute of Electrical Engineering and Computer Science
Gajdowski, Caroline;  Belgian Ceramic Research Centre
Boilet, Laurent;  Belgian Ceramic Research Centre
Henrotte, François  ;  Université de Liège - ULiège > Montefiore Institute of Electrical Engineering and Computer Science
Geuzaine, Christophe  ;  Université de Liège - ULiège > Montefiore Institute of Electrical Engineering and Computer Science
Vertruyen, Bénédicte  ;  Université de Liège - ULiège > Département de chimie (sciences)
Vanderbemden, Philippe  ;  Université de Liège - ULiège > Montefiore Institute of Electrical Engineering and Computer Science
Language :
English
Title :
Partial discharge measurements used as a tool to assess the quality of the electrode contact in flash sintering, Milko Borisov Memorial Lecture
Publication date :
31 August 2020
Event name :
21st International school on condensed matter physics “Progress and Perspectives in Functional Materials”
Event organizer :
Bulgarian academy of sciences
Event place :
Varna, Bulgarie
Event date :
August 31 - September 4, 2020
By request :
Yes
Audience :
International
Peer reviewed :
Peer reviewed
References of the abstract :
http://iscmp.issp.bas.bg/
Name of the research project :
IMAWA – FLASHSINT
Funders :
FEDER - Fonds Européen de Développement Régional [BE]
Région wallonne [BE]
Available on ORBi :
since 11 May 2022

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