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In situ SANS study of pore microstructure in YSZ thermal barrier coatings
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SYSNO ASEP 0105611 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title In situ SANS study of pore microstructure in YSZ thermal barrier coatings Title Studium porézní mikrostruktury YSZ vrstev pro tepelné bariéry pomocí in-situ SANS Author(s) Strunz, Pavel (UJF-V) RID, ORCID, SAI
Schumacher, G. (DE)
Vassen, R. (DE)
Wiedenmann, A. (DE)Source Title Acta Materialia. - : Elsevier - ISSN 1359-6454
Roč. 52, č. 11 (2004), s. 3305-3312Number of pages 8 s. Language eng - English Country GB - United Kingdom Keywords plasma spraying ; thermal barrier coatings ; ceramics Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects GA202/03/0891 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z1048901 - UJF-V Annotation Air plasma sprayed yttria stabilised zirconia (YSZ) thermal barrier coatings (TBCs) were investigated by means of SANS. The measurements were performed in situ at different temperatures up to 1200 degreesC and ex situ after annealing at 1200 degreesC up to 100 h. Scattering curves were described by three populations of pores. The parameters of nanometric and medium-sized (20 nm) pores were determined. Specimens produced under different spray parameters showed qualitatively similar behaviour of nanometric and medium-sized pores during thermal exposure at elevated temperatures. The population of nanopores increased strongly at about 800 degreesC. The evolution of volume and size of nanopores and medium-size pores at 1200 degreesC indicated their sintering. The elimination of these pores coincides with the increase of Young's modulus. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2005
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