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@ARTICLE{Gross:908065,
      author       = {Gross, Jürgen Peter and Malzbender, Jürgen and Schwaiger,
                      Ruth},
      title        = {{S}trength {A}ssessment of {A}l2{O}3 and {M}g{A}l2{O}4
                      {U}sing {M}icro- and {M}acro-scale {B}iaxial {T}ests},
      journal      = {Journal of materials science},
      volume       = {57},
      number       = {15},
      issn         = {0022-2461},
      address      = {Dordrecht [u.a.]},
      publisher    = {Springer Science + Business Media B.V},
      reportid     = {FZJ-2022-02352},
      pages        = {7481 - 7490},
      year         = {2022},
      abstract     = {The application of ceramics in advanced functional
                      applications often requires thicknesses below a few hundred
                      micrometers, rendering an assessment of the materials’
                      strength particularly challenging. In this work, different
                      testing methods are combined to elucidate the effect of the
                      volume and the surface area of the specimens under tensile
                      loading on the fracture strength of Alumina of different
                      purities and Spinel. A ball-on-3-ball test has been
                      implemented into a micro-indentation system permitting as
                      novelty a high control and acquisition of loads and
                      displacements to study the biaxial fracture stress of thin
                      specimens. In addition, ring-on-ring tests are carried out
                      for thicker specimens. Weibull statistics is applied to
                      analyze the fracture stresses. Considering all individual
                      data sets obtained using the two testing methods, the
                      effective volume approach appears most suitable for the
                      materials tested. This conclusion is confirmed by
                      fractographic analysis, where pores could be identified as
                      the main failure initiating defect. The combination of a
                      micro-indentation system and a ball-on-3-ball test as
                      micro-and macro-scale biaxial tests represents an easy, fast
                      and reliable methodology to investigate small scale ceramic
                      materials.},
      cin          = {IEK-2},
      ddc          = {670},
      cid          = {I:(DE-Juel1)IEK-2-20101013},
      pnm          = {1221 - Fundamentals and Materials (POF4-122)},
      pid          = {G:(DE-HGF)POF4-1221},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000781719500001},
      doi          = {10.1007/s10853-022-07143-6},
      url          = {https://juser.fz-juelich.de/record/908065},
}