Preparation and characterization of nanostructured La2Zr2O7 feedstock used for plasma spraying |
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| Authors: | L Wang XG Sun JQ He ZY Pan LL Yu |
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| Affiliation: | Laboratory of Nano Surface Engineering, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001 PR China |
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| Abstract: | The nanostructured La2Zr2O7 (LZ) feedstock with high density, suitable size distribution and nearly spherical morphology which can be used for plasma spraying was prepared by spray drying in this study. The spray drying process was discussed. In addition, the formation mechanism of feedstock with hollow shell structure was discussed by finite element method in this paper. The double ceramic layer (DCL) LZ/YSZ (yttria stabilized zirconia) thermal barrier coatings were prepared using the as prepared LZ feedstock. The average grain size computed by Scherrer formulation, the observation of powder size by Transmission Electron Microscope (TEM) and “single splat” deposition experiment indicate that the as prepared LZ feedstock is nanostructured feedstock. |
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| Keywords: | Thermal barrier coatings Spray drying Feedstock Plasma spray Finite element simulation |
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