A comparison of microstructure and of thermal transport properties of yttria and ceria stabilized zirconia coatings deposited by suspension plasma sprayingReport as inadecuate




A comparison of microstructure and of thermal transport properties of yttria and ceria stabilized zirconia coatings deposited by suspension plasma spraying - Download this document for free, or read online. Document in PDF available to download.

1 SPCTS - Science des Procédés Céramiques et de Traitements de Surface 2 LML - Laboratoire de Mécanique de Lille - FRE 3723 3 Wroclaw University of Technology 4 Axe 2 : procédés de traitements de surface SPCTS - Science des Procédés Céramiques et de Traitements de Surface

Abstract : The single cathode plasma torch SG-100 was used to spray suspension prepared with the use of two kinds of commercial powders ZrO2+8 wt. % Y2O3 8YSZ and ZrO2 + 24 wt.% CeO2 + 2.5 wt.% Y2O3 24CeYSZ. The suspensions were formulated using finely milled solid phase, water and ethanol. The operational spray parameters being the same for each powder were modified by changing: i spray distance; and ii torch scan linear speed. The coatings microstructures were analyzed with the use of optical and scanning electron microscopes as well as by X-ray diffraction. Their porosities were found with help of the image analysis of metallographically prepared cross-sections. Thermal diffusivity was measured with the use of commercial system LFA 447 NanoFlash® working at the temperatures limited to 300°C. The measurements were made with the use of the coatings sprayed on the steel substrate and a 2-layers numerical model was applied to determine thermal diffusity of the coatings. The obtained data were used to calculate thermal conductivity of stabilized zirconia coatings.





Author: Paweł Sokołowski - Leszek Latka - Stefan Kozerski - Andrzej Ambroziak - Lech Pawlowski - Bernard Pateyron -

Source: https://hal.archives-ouvertes.fr/



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