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@ARTICLE{Limarga:13867,
      author       = {Limarga, A.M. and Vaßen, R. and Clarke, D.R.},
      title        = {{S}tress {D}istributions in {P}lasma-{S}prayed {T}hermal
                      {B}arrier {C}oatings {U}nder {T}hermal {C}ycling in a
                      {T}emperature {G}radient},
      journal      = {Journal of applied mechanics},
      volume       = {78},
      issn         = {0021-8936},
      address      = {New York, NY},
      publisher    = {ASME},
      reportid     = {PreJuSER-13867},
      pages        = {1 - 9},
      year         = {2011},
      note         = {This work is supported by the Office of Naval Research,
                      Contract No. N00014-09-1068. The authors are grateful for
                      fruitful discussion with the late Prof. A.G. Evans (UCSB)
                      and Prof. J.W. Hutchinson (Harvard University).},
      abstract     = {The residual stress distribution in plasma-sprayed zirconia
                      thermal barrier coatings subjected to cyclic thermal
                      gradient testing was evaluated using Raman piezospectroscopy
                      and finite element computation. The thermal gradient testing
                      (approximately 440 degrees C/mm at temperature), consisted
                      of repeated front-side heating with a flame and constant
                      cooling of the back-side of the substrate either with
                      front-side radiative cooling only or with additional forced
                      air cooling between the heating cycles. The coatings
                      exhibited characteristic "mud-cracking" with the average
                      crack spacing dependent on the cooling treatment. This is
                      consistent with finite element calculations and Raman
                      spectroscopy measurements in which the sudden drop in
                      coating surface temperature on initial cooling leads to a
                      large biaxial tension at the surface. The key to proper
                      interpretation of the Raman shifts is that the stress-free
                      Raman peaks need to be corrected for shifts associated with
                      the evolution of the metastable tetragonal phase with aging.
                      [DOI: 10.1115/1.4002209]},
      keywords     = {J (WoSType)},
      cin          = {IEK-1},
      ddc          = {670},
      cid          = {I:(DE-Juel1)IEK-1-20101013},
      pnm          = {Rationelle Energieumwandlung},
      pid          = {G:(DE-Juel1)FUEK402},
      shelfmark    = {Mechanics},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000283739400003},
      doi          = {10.1115/1.4002209},
      url          = {https://juser.fz-juelich.de/record/13867},
}