Nanocrystallization of plasma sprayed coatings based on eutectic ceramic alloys
Project ID:KAN300430651
Provider:Grant Agency of the Academy of Sciences
Period:Jul 01, 2006 - Dec 31, 2009
Recipient - coordinatorInstitute of Plasma Physics, Czech Academy of Sciences, Prague
Principal Investigator:Ing. Tomáš Chráska, PhD.
Co-recepient(s) / PI(s):EUTIT s. r. o. -- Vladimír Havlíček
Institute of Inorganic Chemistry of the CAS, v. v. i. -- doc. Ing. Jiří Hostomský, CSc.
Co-investigators from IPPB. Kolman, P. Chráska, P. Rohan, K. Neufuss

Aims of the project: The project is focused on utilization of plasma spray technology to fabricate bulk and gradient nanocrystalline parts with excellent properties. Spraying of feedstock material based on eutectic mixtures of Al, Zr, Si oxides by unique WSP (R) plasma torch will facilitate production of sizable three-dimensional parts with nanocrystalline structure. The ultimate goal of this project is to propose and optimize a technology utilizing WSP (R) plasma torch to fabricate nanocrystalline ceramic parts or thick gradient coatings with nanocrystalline structure on its surface. Mechanical properties of such parts should overcome limitations imposed by using conventional coarse-grained materials. Answers to the following questions must be solved: - influence of different ratios of oxides in the feedstock on formation of amorphous structures; - role of the constituting oxides as centers of nucleation during crystallization; - character of grain boundaries and their influence on the materials properties.

Results:

Chráska T.: Způsob přípravy gradovaného keramického povlaku a gradovaný keramický povlak připravený tímto způsobem. 2013. Vlastník: Ústav fyziky plazmatu AV ČR, v.v.i. Datum udělení patentu: 09.10.2013. Číslo patentu: 304146 [ Abstract ] [ Link ]

Chráska T., Hostomský J., Klementová M., Dubský J.: Crystallization kinetics of amorphous alumina zirconia silica ceramics. Microscopy and Microanalysis 15 [S2] (2009) 1000-1001. [ Abstract ]

Chráska T., Hostomský J., Klementová M., Dubský J.: Crystallization kinetics of amorphous alumina–zirconia–silica ceramics. Journal of the European Ceramic Society 29 [15] (2009) 3159-3165. [ Abstract ] [ Link ]

Chráska T., Neufuss K.: Nanokrystalický kompozitní materiál na bázi Al203 - ZrO2 - SiO2 a způsob jeho přípravy. Ústav fyziky plazmatu AV ČR, v.v.i., Praha 8, CZ, Ústav anorganické chemie AV ČR, v.v.i., Řež u Prahy, CZ, EUTIT, s.r.o., Mariánské Lázně, CZ. Datum podání přihlášky: 12.09.2007. Datum udělení patentu: 18.05.2009. CZ 300602 B6 [ Abstract ]

Chráska T., Hostomský J., Klementová M., Kolman B.: Solid state crystallization of alumina-zirconia-silica nanocomposites. Proceedings of the 11th European Ceramics Society Conference. Cracow : European Ceramic Society and Polish Ceramic Society, 2010 - (Pędzich, Z.) S. 520-526. ISBN 978-83-60958-54-4. [ Abstract ]
[Conference and Exhibition of the European Ceramics Society/11th./. Krakow (PL), 21.062009-25.06.2009]

Chráska T., Neufuss K., Dubský J., Ctibor P., Klementová M.: Fabrication of Bulk Nanocrystalline Ceramic Materials. Journal of Thermal Spray Technology 17 [5-6] (2008) 872-877. [ Abstract ] [ Link ]

Chráska T., Klementová M., Neufuss K., Dubský J., Ctibor P., Rohan P.: CHARACTERISTICS OF NANOCRYSTALLINE SiO2-Al2O3-ZrO2 CERAMICS WITH VARIABLE COMPOSITION PREPARED BY PLASMA SPRAYING. Acta Microscopica 16 [suppl.2] (2007) 137-138. [ Abstract ] [ Link ]
[CIASEM 2007. Cusco, 23.09.2007-28.09.2007]

Chráska T., Klementová M.: BULK NANOCRYSTALLINE ALUMINA-ZIRCONIA MATERIALS. Proceedings 8th multinational congress on microscopy. České Budějovice : Czechoslovak microscopy society, 2007 - (Nebesářová, J.; Hozák, P.) S. 141-142. ISBN 978-80-239-9397-4. [ Abstract ]
[Multinational Congress on Microscopy (8MCM)/8th./. Prague (CZ), 17.06.2007-21.06.2007]

Chráska T., Klementová M., Hostomský J.: Formation of nanocomposite alumina-zirconia-silica ceramics. Acta Technica CSAV 52 [4] (2007) 331-341. [ Abstract ]