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@ARTICLE{Mishra:878011,
      author       = {Mishra, Tarini Prasad and Laptev, Alexander and Ziegner,
                      Mirko and Sistla, Sree Koundinya and Kaletsch, Anke and
                      Broeckmann, Christoph and Guillon, Olivier and Bram, Martin},
      title        = {{F}ield-{A}ssisted {S}intering/{S}park {P}lasma {S}intering
                      of {G}adolinium-{D}oped {C}eria with {C}ontrolled
                      {R}e-{O}xidation for {C}rack {P}revention},
      journal      = {Materials},
      volume       = {13},
      number       = {14},
      issn         = {1996-1944},
      address      = {Basel},
      publisher    = {MDPI},
      reportid     = {FZJ-2020-02580},
      pages        = {3184 -},
      year         = {2020},
      note         = {Open Access Journal},
      abstract     = {Gadolinium-Doped Ceria (GDC) is a prospective material for
                      application in electrochemical devices. Free sintering in
                      air of GDC powder usually requires temperatures in the range
                      of 1400 to 1600 °C and dwell time of several hours.
                      Recently, it was demonstrated that sintering temperature can
                      be significantly decreased, when sintering was performed in
                      reducing atmosphere. Following re-oxidation at elevated
                      temperatures was found to be a helpful measure to avoid
                      sample failure. Sintering temperature and dwell time can be
                      also decreased by use of Spark Plasma Sintering, also known
                      as Field-Assisted Sintering Technique (FAST/SPS). In the
                      present work, we combined for the first time the advantages
                      of FAST/SPS technology and re-oxidation for sintering of GDC
                      parts. However, GDC samples sintered by FAST/SPS were highly
                      sensitive to fragmentation. Therefore, we investigated the
                      factors responsible for this effect. Based on understanding
                      of these factors, a special tool was designed enabling
                      pressureless FAST/SPS sintering in controlled atmosphere.
                      For proof of concept, a commercial GDC powder was sintered
                      in this tool in reducing atmosphere $(Ar-2.9\%H2),$ followed
                      by re-oxidation. The fragmentation of GDC samples was
                      avoided and the number of micro-cracks was reduced to a
                      minimum. Prospects of GDC sintering by FAST/SPS were
                      discussed.},
      cin          = {IEK-1 / JARA-ENERGY / IEK-2},
      ddc          = {600},
      cid          = {I:(DE-Juel1)IEK-1-20101013 / $I:(DE-82)080011_20140620$ /
                      I:(DE-Juel1)IEK-2-20101013},
      pnm          = {899 - ohne Topic (POF3-899) / DFG project 274005202 - SPP
                      1959: Manipulation of matter controlled by electric and
                      magnetic fields: Towards novel synthesis and processing
                      routes of inorganic materials (274005202)},
      pid          = {G:(DE-HGF)POF3-899 / G:(GEPRIS)274005202},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:32708746},
      UT           = {WOS:000554233400001},
      doi          = {10.3390/ma13143184},
      url          = {https://juser.fz-juelich.de/record/878011},
}