Article (Scientific journals)
Use of partial discharge patterns to assess the quality of sample/electrode contacts in flash sintering
Fagnard, Jean-François; Gajdowski, Caroline; Boilet, Laurent et al.
2021In Journal of the European Ceramic Society, 41 (1), p. 669-683
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Keywords :
Partial discharge; Flash sintering; Sample-electrode contact; In-situ monitoring technique
Abstract :
[en] In a flash sintering process, a straightforward way to control the current uniformity through the sample is contacting the sample to the electrodes with platinum paste. This method is however costly for large-scale applications. We show that the in-situ phase resolved partial discharge technique is suitable to assess the quality of the contact between Pt electrodes and uncoated 3YSZ samples. In the temperature range 250−500 °C and for 50 Hz electric fields ramped up to 3.2 kV/cm, a sudden increase of the partial discharge current well before any curvature change of the 50 Hz current is found to be a signature of a defective electrical contact. Changes in the partial discharge amplitude are observed around the current rush. The surface microstructure of the samples subjected to partial discharges shows characteristics similar to those observed during dielectric breakdown, although the applied electric field is well below their typical dielectric strength.
Research center :
SUPRATECS - Services Universitaires pour la Recherche et les Applications Technologiques de Matériaux Électro-Céramiques, Composites, Supraconducteurs - ULiège
Belgian Ceramic Research Centre
Disciplines :
Physics
Electrical & electronics engineering
Materials science & engineering
Author, co-author :
Fagnard, Jean-François  ;  Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Applied and Computational Electromagnetics (ACE)
Gajdowski, Caroline;  Belgian Ceramic Research Centre
Boilet, Laurent;  Belgian Ceramic Research Centre
Henrotte, François  ;  Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Applied and Computational Electromagnetics (ACE)
Geuzaine, Christophe  ;  Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Applied and Computational Electromagnetics (ACE)
Vertruyen, Bénédicte  ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie inorganique structurale
Vanderbemden, Philippe  ;  Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Capteurs et systèmes de mesures électriques
Language :
English
Title :
Use of partial discharge patterns to assess the quality of sample/electrode contacts in flash sintering
Publication date :
January 2021
Journal title :
Journal of the European Ceramic Society
ISSN :
0955-2219
Publisher :
Elsevier, Netherlands
Volume :
41
Issue :
1
Pages :
669-683
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
IMAWA - FLASHSINT
Funders :
FEDER - Fonds Européen de Développement Régional [BE]
Région wallonne [BE]
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