000910105 001__ 910105 000910105 005__ 20240708132700.0 000910105 0247_ $$2doi$$a10.1016/j.ceramint.2022.07.266 000910105 0247_ $$2ISSN$$a0272-8842 000910105 0247_ $$2ISSN$$a0392-2960 000910105 0247_ $$2Handle$$a2128/32031 000910105 0247_ $$2WOS$$aWOS:000870826900004 000910105 037__ $$aFZJ-2022-03613 000910105 082__ $$a670 000910105 1001_ $$0P:(DE-HGF)0$$aBhandari, Subhadip$$b0 000910105 245__ $$aFlash sintering behaviour of 8YSZ-NiO composites 000910105 260__ $$aFaenza$$bCeramurgia$$c2022 000910105 3367_ $$2DRIVER$$aarticle 000910105 3367_ $$2DataCite$$aOutput Types/Journal article 000910105 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article$$bjournal$$mjournal$$s1665984871_4762 000910105 3367_ $$2BibTeX$$aARTICLE 000910105 3367_ $$2ORCID$$aJOURNAL_ARTICLE 000910105 3367_ $$00$$2EndNote$$aJournal Article 000910105 520__ $$aFlash sintering is an electric field/current assisted sintering technique, which is reported to lower the furnace temperature and to reduce sintering time significantly. In this work, we have studied the processing of 8YSZ/NiO composites by flash sintering, for the first time. Two composites, with different amount of NiO (one below the percolation limit and another one above it) were processed in two different sintering atmospheres. Constant heating rate experiments were performed to know the minimum furnace temperature required to flash sinter the samples for a given applied electric field. Subsequently, isothermal flash sintering experiments were performed at different current densities. The flash onset temperature of the composites was lower in the reducing atmosphere compared to in air. The power dissipated in stage III of the flash was strongly influenced by the composite composition and the sintering atmosphere. The extent of densification in the composites was controlled by the current density. The composites were densified up to a relative density of ∼90% in 30 s when flash sintered in air. In reducing atmosphere, there was in-situ reduction of NiO to Ni. As a result, for composites containing NiO above the percolation limit, the current preferentially flew through the in-situ formed metallic phase and there was no densification in the composite in reducing atmosphere. Phase and microstructure evolution in the composites was studied through XRD, SEM and EDS. With proper control of the electrical parameters (electric field and current density), composites with controlled porosity can be processed through flash sintering which may have applications for solid oxide fuel cells. 000910105 536__ $$0G:(DE-HGF)POF4-899$$a899 - ohne Topic (POF4-899)$$cPOF4-899$$fPOF IV$$x0 000910105 588__ $$aDataset connected to CrossRef, Journals: juser.fz-juelich.de 000910105 7001_ $$0P:(DE-HGF)0$$aMishra, Tarini Prasad$$b1 000910105 7001_ $$0P:(DE-Juel1)129591$$aBram, Martin$$b2 000910105 7001_ $$0P:(DE-Juel1)161591$$aGuillon, Olivier$$b3 000910105 7001_ $$0P:(DE-HGF)0$$aYadav, Devinder$$b4$$eCorresponding author 000910105 773__ $$0PERI:(DE-600)245887-1$$a10.1016/j.ceramint.2022.07.266$$gVol. 48, no. 22, p. 33236 - 33244$$n22$$p33236 - 33244$$tCeramics international / Ci news$$v48$$x0272-8842$$y2022 000910105 8564_ $$uhttps://juser.fz-juelich.de/record/910105/files/Corrected%20Proof%20Bhandari%20et%20al.pdf$$yPublished on 2022-08-10. 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