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Article failure mechanism of yttria stabilized zirconia atmospheric plasma sprayed thermal barrier coatings subjected to calcia11nesia-alumino-silicate environmental attack

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F17%3A10238122" target="_blank" >RIV/61989100:27360/17:10238122 - isvavai.cz</a>

  • Result on the web

    <a href="http://dx.doi.org/10.4028/www.scientific.net/SSP.270.39" target="_blank" >http://dx.doi.org/10.4028/www.scientific.net/SSP.270.39</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.4028/www.scientific.net/SSP.270.39" target="_blank" >10.4028/www.scientific.net/SSP.270.39</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Article failure mechanism of yttria stabilized zirconia atmospheric plasma sprayed thermal barrier coatings subjected to calcia11nesia-alumino-silicate environmental attack

  • Original language description

    The contribution focuses on the description of failure mechanism of atmospheric plasma sprayed multilayer thermal barrier coatings subjected to calcia-magnesia-alumino-silicate (CMAS) environmental attack. To identify exothermic and endothermic reactions which occurred during heating/cooling by means of calorimetry was also utilized initial yttria stabilized zirconia (YSZ) powder subsequently used for thermal spraying of multilayer thermal barrier coating system (TBCs), CMAS powder later on utilized for thin layer deposition and its mixture. Atmospheric plasma spray technique was used to produce the TBCs on a grit blasted nickel-based superalloy substrates, where CoNiCrAlY powder was used for deposition of a bond coat and YSZ powder was sprayed as a top coat. In accordance to the aerospace standard the thin layer of CMAS was deposited on as sprayed TBCs samples surface from its colloidal solution by paint brush method. Burner-rig test, utilizing direct propane-oxygen flame, was used for thermal cyclic exposition of the multilayer coated samples at the temperature of 1150 °C. Samples after thermal cyclic exposure test were investigated by means of materialographic analysis approaches. The significant reduction in life-time of CMAS coated YSZ top coat was observed due to lower melting point phase formation and molten silicate crystallization within the pores providing the spallation identified as a major mechanism of TBCs failure.

  • Czech name

  • Czech description

Classification

  • Type

    D - Article in proceedings

  • CEP classification

  • OECD FORD branch

    20506 - Coating and films

Result continuities

  • Project

  • Continuities

    V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Others

  • Publication year

    2017

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Article name in the collection

    Solid State Phenomena. Volume 270

  • ISBN

    978-3-0357-1241-4

  • ISSN

    1012-0394

  • e-ISSN

    1662-9779

  • Number of pages

    6

  • Pages from-to

    39-44

  • Publisher name

    Trans Tech Publication Ltd

  • Place of publication

    Zürich

  • Event location

    Mariánské Lázně

  • Event date

    Jun 6, 2017

  • Type of event by nationality

    WRD - Celosvětová akce

  • UT code for WoS article