Optimization of High Porosity Thermal Barrier Coatings Generated with a Porosity Former

0436557 - ÚFP 2015 DE eng C - Konferenční příspěvek (zahraniční konf.)
Medřický, Jan - Vilémová, Monika - Chráska, Tomáš - Curry, N. - Markocsan, N.
Optimization of High Porosity Thermal Barrier Coatings Generated with a Porosity Former.
ITSC 2014 :Interational Thermal Spray Conference and Exposition, Abstracts (including manuscripts on CD-ROM). Düsseldorf: DVS Media GmbH, 2014, s. 680-685. DVS-Berichte, 302. ISBN 978-3-87155-574-9.
[ITSC 2014 :Interational Thermal Spray Conference and Exposition. Barcelona (ES), 21.05.2014-23.05.2014]
Grant CEP: GA ČR GB14-36566G
Institucionální podpora: RVO:61389021
Klíčová slova: thermal barrier coatings * stabilized zirconia * plasma spraying * porosity of coatings
Kód oboru RIV: JH - Keramika, žáruvzdorné materiály a skla

Thermal barrier coatings are extensively used in turbine industry where high performance coatings which can withstand very high temperatures and have long lifetime are required. Yttria stabilized zirconia coatings were found to best fulfil these needs; however increasing performance requirements have begun to make conventional air plasma sprayed coatings insufficient for future needs. Since the thermal conductivity of bulk material cannot be lowered easily; the design of highly porous coatings may be the most efficient way to achieve coatings with low thermal conductivity. The approach of fabrication of coatings with a high porosity level based on plasma spraying of ceramic particles of dysprosia stabilized zirconia mixed with polymer particles, has been tested. In order to obtain desired porosity level and microstructural features in coatings; a design of experiments (DoE), based on changes in spray distance, powder feeding rate and plasma forming atmosphere, was performed.
Trvalý link: http://hdl.handle.net/11104/0240290