Measured and predicted thermal conductivities for ysz layers: application of different models

0570022 - ÚFP 2023 RIV US eng O - Others
Illková, Ksenia - Mušálek, Radek - Medřický, Jan
Measured and predicted thermal conductivities for ysz layers: application of different models.
2022
Institutional support: RVO:61389021
Keywords : thin yttria-stabilized zirconia * coatings * plasma spray technology
OECD category: Materials engineering

Thin yttria-stabilized zirconia (YSZ) coatings were deposited on stainless steel substrates from liquid feedstocks by plasma spray technology. The porosity of the coating has a substantial effect on its thermal properties depending on the morphology and the orientation of the pores. Properties of four different YSZ layers were measured by the laser flash diffusivity method from RT to 800ºC. Different analytical models for the thermal conductivity were applied and compared for the purpose of validation for thermal barrier coatings (TBCs) prepared by hybrid water-stabilized plasma spraying torch (WSP-H). Additionally, the influence of the substrate thickness, thermal stability of the coating and atmosphere during the measurement was carefully investigated. Afterwards, the models for prediction of the thermal conductivity values were applied
Permanent Link: https://hdl.handle.net/11104/0341375