Study of nanocomposite hafnia and zirconia based layers produced by plasma sprayingстатья
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Дата последнего поиска статьи во внешних источниках: 8 апреля 2022 г.
Аннотация:Nanostructured and nanocomposite layers NiCoCrAlY+ ZrO2-7%Y2O3, ZrO2-7%Y2O3+HfO2-9%Y2O3, HfO2-9%Y2O3 with thickness of ~ 20 μm were formed by low pressureplasma spraying. The structure and composition of the layers have been studied using ascanning electron microscopy, X-ray microanalysis, and XRD analysis. Thermal stability ofthe coatings has been analyzed using synchronous thermal analysis at temperatures up to 1600°C. The results of structure and composition analysis of ZrO2-7%Y2O3+HfO2-9%Y2O3 layersuggest the formation of nanocomposite co-doped regions of the ZrO2-HfO2-Y2O3 solidsolution. The layer has greater thermal stability at temperatures up to 1600 ° C and a smallersubgrain size (~ 33 nm) than for the ZrO2-7% Y2O3 and HfO2-9%Y2O3 layers.