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NOVEL CERAMIC MATERIAL WITH AMORPHOUS AND NANOCRYSTALLINE MICROSTRUCTURE
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SYSNO ASEP 0027055 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title NOVEL CERAMIC MATERIAL WITH AMORPHOUS AND NANOCRYSTALLINE MICROSTRUCTURE Title Nový keramický materiál s amorfní a nanokrystalickou strukturou Author(s) Chráska, Tomáš (UFP-V) RID, ORCID
Neufuss, Karel (UFP-V) RID
Dubský, Jiří (UFP-V) RID
Nohava, Jiří (UFP-V)Source Title Proceedings. - Ljubljana, 2005 / Čeh M. ; Dražič G. ; Fidler S. - ISBN 961-6303-69-4 Pages s. 167-168 Number of pages 2 s. Action Multinational Congress on Microscopy (7MCM)/7th./ Event date 26.06.2005-30.06.2005 VEvent location Portorož Country SI - Slovenia Event type WRD Language eng - English Country SI - Slovenia Keywords nanocrystalline ceramics ; plasma spraying ; heat treatment ; electron microscopy Subject RIV JH - Ceramics, Fire-Resistant Materials and Glass R&D Projects GP106/04/P012 GA ČR - Czech Science Foundation (CSF) Annotation A new ceramic material has been used for plasma spraying. The material is a refractory and is composed of three main compounds, namely Al2O3, ZrO2, and SiO2. Conventionally, the material is fabricated by melt casting. Cast tiles of the material were ground and sieved to obtain the right powder cut size for plasma spraying by water stabilized plasma torch (WSP®). Both dense coatings and free standing parts were successfully produced from the new material by WSP®. The coatings exhibit very low porosity and high hardness. The as-sprayed material is mostly amorphous as determined by X-ray diffraction. Cross-sectional studies of individual solidified splats by transmission electron microscopy (TEM) established them to be fully amorphous oxide blend with no distinct microstructure. Upon annealing, the as-sprayed material crystallizes around 950ºC. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2006
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