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@ARTICLE{Bhandari:910105,
      author       = {Bhandari, Subhadip and Mishra, Tarini Prasad and Bram,
                      Martin and Guillon, Olivier and Yadav, Devinder},
      title        = {{F}lash sintering behaviour of 8{YSZ}-{N}i{O} composites},
      journal      = {Ceramics international / Ci news},
      volume       = {48},
      number       = {22},
      issn         = {0272-8842},
      address      = {Faenza},
      publisher    = {Ceramurgia},
      reportid     = {FZJ-2022-03613},
      pages        = {33236 - 33244},
      year         = {2022},
      abstract     = {Flash 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.},
      cin          = {IEK-1 / JARA-ENERGY},
      ddc          = {670},
      cid          = {I:(DE-Juel1)IEK-1-20101013 / $I:(DE-82)080011_20140620$},
      pnm          = {899 - ohne Topic (POF4-899)},
      pid          = {G:(DE-HGF)POF4-899},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000870826900004},
      doi          = {10.1016/j.ceramint.2022.07.266},
      url          = {https://juser.fz-juelich.de/record/910105},
}