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Hoydalsvik, Kristin
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- 2010Yttria-zirconia coatings studied by grazing-incidence small-angle X-ray scattering during in situ heatingcitations
- 2009Article Previous Article Next Article Table of Contents In Situ Double Anomalous Small-Angle X-ray Scattering of the Sintering and Calcination of Sol−Gel Prepared Yttria-Stabilized-Zirconia Ceramicscitations
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Article Previous Article Next Article Table of Contents In Situ Double Anomalous Small-Angle X-ray Scattering of the Sintering and Calcination of Sol−Gel Prepared Yttria-Stabilized-Zirconia Ceramics
Abstract
Yttria-stabilized-zirconia xerogels are heat treated to temperatures of 1000 °C, and the evolving structures are analyzed using anomalous small-angle X-ray scattering (ASAXS) across two absorption edges. Homogeneous nanocrystals (10 nm in size) begin to grow at temperatures above 390 °C for pure YSZ, while the presence of a silica matrix inhibits nucleation until 780 °C. Anomalous effects have shown that zirconia plays the dominant role in crystal growth and that varying concentrations of yttria do not affect the nucleation temperatures or average size of the individual particles. The difference between scattering factors, necessary for accurate ASAXS analysis, is also investigated. Relations for this analysis were derived from X-ray absorption spectra, conducted as part of the small-angle scattering investigations.