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@PHDTHESIS{Nonemacher:867679,
      author       = {Nonemacher, Juliane Franciele},
      title        = {{M}icromechanical {C}haracterization of {C}eramic {S}olid
                      {E}lectrolytes for {E}lectrochemical {S}torage {D}evices},
      volume       = {490},
      school       = {RWTH Aachen},
      type         = {Dr.},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {FZJ-2019-06295},
      isbn         = {978-3-95806-461-4},
      series       = {Schriften des Forschungszentrums Jülich Reihe Energie $\&$
                      Umwelt / Energy $\&$ Environment},
      pages        = {xv, 131 S.},
      year         = {2020},
      note         = {RWTH Aachen, Diss., 2019},
      abstract     = {The use of solid electrolytes in solid-state batteries
                      offers safer operation, higher performance in terms of
                      energy storage, as well as high thermal and chemical
                      stability. Furthermore, solid electrolytes are expected to
                      possess enhanced ionic conductivity and mechanical stability
                      that warrants a safer separation of cathode and anode, and
                      hence, potentially permits them to withstand long-term
                      cycling operation. However, mechanical boundary conditions
                      and operation as electrolyte under cyclic loading might
                      still induce micro-cracks, dendrite growth, structural and
                      mechanical failure that ultimately will terminate the
                      battery life. Therefore, the mechanical reliability of solid
                      electrolytes is important to warrant long-term reliability
                      of solid state batteries. In this thesis, aiming at a
                      characterization of reliability and life-time relevant
                      aspects, the mechanical properties of
                      Li$_{7}$La$_{3}$Zr$_{2}$O$_{12}$ for the application as
                      solid electrolyte are studied on amicro-scale and the
                      correlation to the materials microstructural
                      characteristics. Mechanical investigations are based on
                      indentation testing, yielding elastic modulus hardness and
                      fracture toughness, where the use of an advanced
                      micro-pillar testing methodology permitted to gain insight
                      into the fracture properties of individual grains. The
                      results emphasis the importance of the materials
                      microstructure as well as the used testing loads, which
                      illustrate effects related to the local apparent plasticity,
                      and for larger loads localized pores. Overall, combining
                      nano- and micro-indentation testing yields elastic modulus,
                      hardness and fracture toughness with respect to materials
                      intrinsic properties and global properties, where the use of
                      standard Vickers indentation and the novel micro-pillar
                      splitting test permit assessment of the fracture toughness
                      of individual grains and effects related to grain boundaries
                      and pores.},
      cin          = {IEK-2},
      cid          = {I:(DE-Juel1)IEK-2-20101013},
      pnm          = {113 - Methods and Concepts for Material Development
                      (POF3-113)},
      pid          = {G:(DE-HGF)POF3-113},
      typ          = {PUB:(DE-HGF)3 / PUB:(DE-HGF)11},
      urn          = {urn:nbn:de:0001-2020102045},
      url          = {https://juser.fz-juelich.de/record/867679},
}