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@ARTICLE{Mauer:819879,
      author       = {Mauer, Georg and Du, Linnan and Vassen, Robert},
      title        = {{A}tmospheric {P}lasma {S}praying of {S}ingle {P}hase
                      {L}anthanum {Z}irconate {T}hermal {B}arrier {C}oatings with
                      {O}ptimized {P}orosity},
      journal      = {Coatings},
      volume       = {6},
      number       = {4},
      issn         = {2079-6412},
      address      = {Basel},
      publisher    = {MDPI},
      reportid     = {FZJ-2016-05455},
      pages        = {49},
      year         = {2016},
      abstract     = {The shortcomings at elevated operation temperatures of the
                      standard material yttria-stabilized zirconia (YSZ) for
                      thermal barrier coatings (TBCs) have initiated many research
                      activities seeking alternatives. One candidate is the
                      pyrochlore lanthanum zirconate La2Zr2O7 (LZ), which is
                      phase-stable to its melting point. At the same time, it
                      shows a lower thermal conductivity and a lower sintering
                      tendency when compared to YSZ. Because of its low thermal
                      expansion coefficient and poor toughness, it is applied in
                      combination with YSZ in double layer TBC systems. It is the
                      current state of knowledge that LZ is prone to lanthanum
                      depletion if processed by plasma spraying. The process
                      conditions have to be selected carefully to avoid this.
                      Furthermore, the amount and morphology of the coating
                      porosity is essential for a good thermo-mechanical
                      performance. In this work, the development and testing of
                      LZ/YSZ double layer TBC systems is described. Initially,
                      suitable basic parameters (torch, plasma gas composition,
                      and power) were tested with respect to coating
                      stoichiometry. Then, microstructures were optimized by
                      adjusting feed rate, spray distance, and by selecting a more
                      appropriate feedstock. Powder particles and coatings were
                      characterized by digital image analysis.},
      cin          = {IEK-1},
      ddc          = {660},
      cid          = {I:(DE-Juel1)IEK-1-20101013},
      pnm          = {113 - Methods and Concepts for Material Development
                      (POF3-113)},
      pid          = {G:(DE-HGF)POF3-113},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000392485400009},
      doi          = {10.3390/coatings6040049},
      url          = {https://juser.fz-juelich.de/record/819879},
}