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Thermal barrier coatings from sol-gel-derived spray-grade Y2O3-ZrO2 microspheres
Vise andre og tillknytning
1993 (engelsk)Inngår i: Journal of Materials Science, Vol. 28, nr 10, s. 2803-2807Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

For the development of ceramic thermal barrier coatings, spray-grade yttria-stabilized zirconia microspheres were prepared by the sol-gel technique. Oxide microspheres were obtained by calcination of the corresponding gel spheres at 1000 °C. Scanning electron microscopic and optical microscopic observations revealed the material thus obtained to have a predominantly spherical morphology and the requisite size distribution (5-50 μm). The dense, calcined microspheres showed good flowability. X-ray diffraction studies indicated the presence of the tetragonal polymorph of ZrO2 as the major phase, in addition to about 14% monoclinic ZrO2. The plasma-sprayed YSZ coatings made from the sol-gel-derived microspheres showed a further decrease in the monoclinic ZrO2 content (6%). The coatings survived 40-50 thermal cycles (30 min at 1200 °C followed by a water quench), indicating good thermal shock resistance. © 1993 Chapman & Hall.

sted, utgiver, år, opplag, sider
Kluwer Academic Publishers , 1993. Vol. 28, nr 10, s. 2803-2807
Emneord [en]
Ceramic coatings, Morphology, Plasma spraying, Zirconia, Oxide microsphere, Thermal barrier coatings, Thermal shock resistance, X-ray diffraction studies, Zirconia powders, Sol-gels
Identifikatorer
URN: urn:nbn:se:hv:diva-8429ISBN: 00222461 (ISSN) (tryckt)OAI: oai:DiVA.org:hv-8429DiVA, id: diva2:860172
Tilgjengelig fra: 2015-10-10 Laget: 2015-10-08 Sist oppdatert: 2015-10-10bibliografisk kontrollert

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