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@PHDTHESIS{Zhou:862519,
      author       = {Zhou, Dapeng},
      title        = {{C}olumnar {S}tructured {T}hermal {B}arrier {C}oatings
                      {D}eposited by {A}xial {S}uspension {P}lasma {S}praying},
      volume       = {456},
      school       = {Universität Bochum},
      type         = {Dr.},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {FZJ-2019-02822},
      isbn         = {978-3-95806-391-4},
      series       = {Schriften des Forschungszentrums Jülich Reihe Energie $\&$
                      Umwelt / Energy $\&$ Environment},
      pages        = {VI, 126 S.},
      year         = {2019},
      note         = {Universität Bochum, Diss., 2018},
      abstract     = {Thermal Barrier Coatings (TBCs) providing thermal
                      insulation for underlying metalliccomponents are widely used
                      in turbine engines. Suspension Plasma Spraying (SPS) is
                      apromising technology to produce TBCs. With it, a variety of
                      microstructures can be achieved.Especially columnar
                      structured coatings with high strain tolerance have great
                      potentials as TBCs.Thus the potentials of SPS coatings as
                      TBCs were explored in this work.In this work, potentials of
                      SPS coatings were discussed with four parts, respectively.
                      In the firstpart, relationships between spraying parameters,
                      microstructures, mechanical properties andthermal cycling
                      lifetime were preliminarily explored. It was found that
                      spraying parametersespecially spraying distance and bond
                      coat roughness greatly affected the microstructures
                      ofcoatings. A simplified model was built to correlate the
                      mechanical properties to the thermalcycling lifetime.Even
                      though mechanical properties of coatings were optimized in
                      the first part, the lifetime ofSPS coatings was still short
                      compared with APS coatings. Therefore, in the second part, a
                      failuremechanism for columnar SPS coatings was promoted.
                      According to this failure mechanism, twoarchitecture designs
                      were promoted. With the new architectures, the lifetime of
                      SPS coatingswas greatly improved.Sintering behavior of
                      columnar TBCs produced with SPS was discussed in the third
                      part.Annealing resulted in obvious modifications on the
                      microstructure of the coatings. Thesemodifications also led
                      to changes in mechanical properties. It was found that by
                      short time preannealing,thermal cycling lifetime of coating
                      could be significantly improved.In the last part, thermal
                      cycling performances of multilayered GZO/YSZ coatings were
                      discussed.These multilayered coatings exhibited excellent
                      thermal cycling performances which could beattributed to
                      their higher strain tolerance and better sintering
                      resistance.In summary, SPS is a very promising technology
                      for applying the top coat of TBCs; however,further
                      researches are needed to get a full understanding of this
                      type of coatings},
      cin          = {IEK-1},
      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)3 / PUB:(DE-HGF)11},
      url          = {https://juser.fz-juelich.de/record/862519},
}