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On the power density at the onset for flash sintering in ceramic composites
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SYSNO ASEP 0543333 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title On the power density at the onset for flash sintering in ceramic composites Author(s) Biesuz, Mattia (UFP-V)
Ometto, L. (IT)
Tyrpekl, V. (CZ)
Vilémová, Monika (UFP-V) RID, ORCID
Sglavo, V. M. (IT)Number of authors 5 Article number 113984 Source Title Scripta Materialia. - : Elsevier - ISSN 1359-6462
Roč. 201, August (2021)Number of pages 5 s. Language eng - English Country US - United States Keywords Ceramic composites ; Flash sintering ; Flash sintering mechanisms ; Joule heating ; Sintering Subject RIV JI - Composite Materials OECD category Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics R&D Projects EF18_053/0016925 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access Institutional support UFP-V - RVO:61389021 UT WOS 000670403400003 EID SCOPUS 85107282146 DOI 10.1016/j.scriptamat.2021.113984 Annotation Flash sintering is usually said to be activated in a narrow range of power density regardless of the onset flash temperature and material. However, the typical logarithmic scale employed in the flash power plots could hide some finer tendencies in the flash onset conditions. Herein, we investigated the flash onset in YSZ/Al2O3 composites taking into account the power density normalized to the total composite (won-comp) and the conductive phase volume (won-YSZ). The results show that at the flash onset (i) won-YSZ strongly increases with the Al2O3 amount in the composite, (ii) won-comp weakly depends on the composite composition, and (iii) both won-comp and won-YSZ increase with the flash onset temperature (which is a function of the electric field). The results offer new light on the mechanisms of flash ignition and a new insight on the power required to activate the phenomenon, which appears to be consistent with a thermally-driven process. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2022 Electronic address https://www.sciencedirect.com/science/article/pii/S1359646221002645?via%3Dihub
Number of the records: 1