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Home List of Titles Microstructural characterization of yttria-stabilized zirconia plasma-sprayed deposits using multiple small-angle neutron scattering
Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/41740
- Microstructural characterization of yttria-stabilized zirconia plasma-sprayed deposits using multiple small-angle neutron scattering
- Allen, Andrew J.; Ilavsky, Jan; Long, Gabrielle G.; Wallace, Jay S.; Berndt, Christopher C.; Herman, Herbert
- Density, electron microscopy, elastic modulus, and small-angle neutron scattering studies are used to characterize the microstructures of yttria-stabilized zirconia plasma-sprayed deposits as a function of both feedstock morphology and annealing. In particular, anisotropic multiple small-angle neutron scattering data are combined with anisotropic Pored scattering results to quantify each of the three main porous components in these thermal barrier coating materials: intrasplat cracks, intersplat lamellar pores and globular pores. An inverse correlation between the volume of porosity and its surface area is confirmed for the as-sprayed deposits, as is a preferential annealing of intrasplat cracks at elevated temperatures. The average elastic modulus is correlated with the total void surface area while the elastic anisotropy is related more closely to the intersplat porosity. However, depending on the feedstock morphology, globular pores are also shown to play a surprisingly significant role in post-anneal deposit microstructures and properties.
- Publication type
- Journal article
- Acta Materialia, Vol. 49, no. 9 (May 2001), pp. 1661-1675
- Publication year
- Alumina; Ceramics; Coating; Elastic modulus; Microstructure; Neutron scattering; Plasma spray; Thermal barrier coatings
- Elsevier Science
- Publisher URL
- Copyright © 2001 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.
- Peer reviewed