Yttria-stabilised zirconia and lanthanum cerate granules with YSZ whiskers prepared by spray drying for thermal barrier coatings
The aim of this study was to explore the effect of different solid phases and varied amounts of polyvinyl alcohol (PVA) on granule size of plasma-sprayable yttria-stabilised zirconia (YSZ) with YSZ whiskers (YSZ/W) and lanthanum cerate (La2Ce2O7, LC) with YSZ whiskers (LC/W) as composite powders. Th...
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Elsevier
2024-12-01
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| Series: | Open Ceramics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666539524001585 |
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| author | Milan Parchovianský Monika Michálková Ivana Parchovianská Beáta Pecušová Dušan Galusek Amirhossein Pakseresht |
| author_facet | Milan Parchovianský Monika Michálková Ivana Parchovianská Beáta Pecušová Dušan Galusek Amirhossein Pakseresht |
| author_sort | Milan Parchovianský |
| collection | DOAJ |
| description | The aim of this study was to explore the effect of different solid phases and varied amounts of polyvinyl alcohol (PVA) on granule size of plasma-sprayable yttria-stabilised zirconia (YSZ) with YSZ whiskers (YSZ/W) and lanthanum cerate (La2Ce2O7, LC) with YSZ whiskers (LC/W) as composite powders. The initial phase of this study involved the preparation and optimization of a YSZ suspension using varying solid loadings of YSZ powder (ranging from 30 to 75 wt%) and PVA serving as both a binder and dispersant. The suspension was subjected to rigorous optimization procedures to meet the required standards. The suspensions were spray dried, and the resulting granulates were examined using SEM to determine their shape and size. The particle size of YSZ granules increased with increasing solid loading of YSZ in the suspension. The optimum amount of dispersant was found to be 1 wt% related to the weight of solid, while the solid loading was 75 wt% of YSZ. In some cases, excessive YSZ solid loading and dispersant impaired the formation of spherical granules. Composite YSZ/W and LC/W granules were also prepared with spherical, lemon, or irregular shapes, with the whiskers embedded in the YSZ or LC powder. |
| format | Article |
| id | doaj-art-e63069127f2e4c3b8b0f65da8d48fa25 |
| institution | Kabale University |
| issn | 2666-5395 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
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| series | Open Ceramics |
| spelling | doaj-art-e63069127f2e4c3b8b0f65da8d48fa252024-12-08T06:12:59ZengElsevierOpen Ceramics2666-53952024-12-0120100694Yttria-stabilised zirconia and lanthanum cerate granules with YSZ whiskers prepared by spray drying for thermal barrier coatingsMilan Parchovianský0Monika Michálková1Ivana Parchovianská2Beáta Pecušová3Dušan Galusek4Amirhossein Pakseresht5Centre for Functional and Surface Functionalized Glass, Alexander Dubček University of Trenčín, 911 50, Trenčín, Slovakia; Corresponding author.Joint Glass Centre of the IIC SAS, TnUAD, FChPT STU, Funglass, Študentská 2, 911 50, Trenčín, SlovakiaCentre for Functional and Surface Functionalized Glass, Alexander Dubček University of Trenčín, 911 50, Trenčín, SlovakiaCentre for Functional and Surface Functionalized Glass, Alexander Dubček University of Trenčín, 911 50, Trenčín, SlovakiaCentre for Functional and Surface Functionalized Glass, Alexander Dubček University of Trenčín, 911 50, Trenčín, Slovakia; Joint Glass Centre of the IIC SAS, TnUAD, FChPT STU, Funglass, Študentská 2, 911 50, Trenčín, SlovakiaCentre for Functional and Surface Functionalized Glass, Alexander Dubček University of Trenčín, 911 50, Trenčín, SlovakiaThe aim of this study was to explore the effect of different solid phases and varied amounts of polyvinyl alcohol (PVA) on granule size of plasma-sprayable yttria-stabilised zirconia (YSZ) with YSZ whiskers (YSZ/W) and lanthanum cerate (La2Ce2O7, LC) with YSZ whiskers (LC/W) as composite powders. The initial phase of this study involved the preparation and optimization of a YSZ suspension using varying solid loadings of YSZ powder (ranging from 30 to 75 wt%) and PVA serving as both a binder and dispersant. The suspension was subjected to rigorous optimization procedures to meet the required standards. The suspensions were spray dried, and the resulting granulates were examined using SEM to determine their shape and size. The particle size of YSZ granules increased with increasing solid loading of YSZ in the suspension. The optimum amount of dispersant was found to be 1 wt% related to the weight of solid, while the solid loading was 75 wt% of YSZ. In some cases, excessive YSZ solid loading and dispersant impaired the formation of spherical granules. Composite YSZ/W and LC/W granules were also prepared with spherical, lemon, or irregular shapes, with the whiskers embedded in the YSZ or LC powder.http://www.sciencedirect.com/science/article/pii/S2666539524001585Spray dryingGranulesYSZPlasma sprayable powder |
| spellingShingle | Milan Parchovianský Monika Michálková Ivana Parchovianská Beáta Pecušová Dušan Galusek Amirhossein Pakseresht Yttria-stabilised zirconia and lanthanum cerate granules with YSZ whiskers prepared by spray drying for thermal barrier coatings Open Ceramics Spray drying Granules YSZ Plasma sprayable powder |
| title | Yttria-stabilised zirconia and lanthanum cerate granules with YSZ whiskers prepared by spray drying for thermal barrier coatings |
| title_full | Yttria-stabilised zirconia and lanthanum cerate granules with YSZ whiskers prepared by spray drying for thermal barrier coatings |
| title_fullStr | Yttria-stabilised zirconia and lanthanum cerate granules with YSZ whiskers prepared by spray drying for thermal barrier coatings |
| title_full_unstemmed | Yttria-stabilised zirconia and lanthanum cerate granules with YSZ whiskers prepared by spray drying for thermal barrier coatings |
| title_short | Yttria-stabilised zirconia and lanthanum cerate granules with YSZ whiskers prepared by spray drying for thermal barrier coatings |
| title_sort | yttria stabilised zirconia and lanthanum cerate granules with ysz whiskers prepared by spray drying for thermal barrier coatings |
| topic | Spray drying Granules YSZ Plasma sprayable powder |
| url | http://www.sciencedirect.com/science/article/pii/S2666539524001585 |
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