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@ARTICLE{RangelHernndez:888961,
      author       = {Rangel-Hernández, Victor and Fang, Qingping and
                      Malzbender, Jürgen and Sause, M. G. R. and Babelot, Carole
                      and Gross-Barsnick, Sonja-Michaela and Blum, Ludger},
      title        = {{A}n {A}coustic {E}mission {A}nalysis of {G}lass-ceramic
                      {S}ealants for {S}olid {O}xide {F}uel and {E}lectrolysis
                      {C}ells {E}xposed to {T}orsional {T}est: {R}oom and
                      {H}igh-temperature {E}xperiments},
      journal      = {Journal of power sources},
      volume       = {46},
      number       = {27},
      issn         = {0378-7753},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2020-05360},
      pages        = {14724 - 14734},
      year         = {2021},
      abstract     = {The mechanical integrity of the sealant material is of key
                      importance for the long-term, reliable operation of solid
                      oxide fuel/electrolysis cell stacks. However, in-situ
                      monitoring and detection of potential failures in sealing
                      materials using classical electrochemical characterization
                      techniques are difficult tasks. Therefore, in this work, the
                      acoustic emission (AE) technique is applied to monitor and
                      characterize the failure process of a glass-ceramic sealant
                      exposed to torsional shear strength at both room and typical
                      stack operation temperature (750 °C). Hourglass-shaped
                      steel specimens are produced for the tests. A glass-ceramic
                      material with two different porosities is used to join the
                      specimens. The failure process is characterized in terms of
                      AE peak amplitude, AE cumulative hits and AE energy, as well
                      as the average frequency content of the signals. The results
                      indicate that the degree of microscopic damage can be
                      determined from the analysis of the AE energy and the
                      fracture mechanisms can be found by statistical analysis of
                      the average frequency of the signals. The fractured surfaces
                      are visualized by optical microscopy to unveil that
                      specimens with high porosity showed a fully cohesive
                      fracture pattern, while specimens with low porosity showed a
                      partially fracture pattern. As a result, AE method promises
                      to be a potential in-operando technique for monitoring
                      mechanical failure processes inside solid oxide cell
                      stacks.},
      cin          = {IEK-14 / IEK-2 / IAS-7 / ZEA-1},
      ddc          = {620},
      cid          = {I:(DE-Juel1)IEK-14-20191129 / I:(DE-Juel1)IEK-2-20101013 /
                      I:(DE-Juel1)IAS-7-20180321 / I:(DE-Juel1)ZEA-1-20090406},
      pnm          = {1231 - Electrochemistry for Hydrogen (POF4-123)},
      pid          = {G:(DE-HGF)POF4-1231},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000639330400012},
      doi          = {10.1016/j.ijhydene.2021.01.232},
      url          = {https://juser.fz-juelich.de/record/888961},
}