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

0443923 - ÚFP 2016 RIV US eng J - Článek v odborném periodiku
Medřický, J. - Curry, N. - Pala, Zdeněk - Vilémová, Monika - Chráska, Tomáš - Johansson, J. - Markocsan, N.
Optimization of High Porosity Thermal Barrier Coatings Generated with a Porosity Former.
Journal of Thermal Spray Technology. Roč. 24, č. 4 (2015), s. 622-628. ISSN 1059-9630. E-ISSN 1544-1016
Grant CEP: GA ČR GB14-36566G
Institucionální podpora: RVO:61389021
Klíčová slova: gas turbines * high temperature application * porosity of coatings * stabilized zirconia * thermal barrier coatings (TBCs)
Kód oboru RIV: JH - Keramika, žáruvzdorné materiály a skla
Impakt faktor: 1.568, rok: 2015

Yttria-stabilized zirconia thermal barrier coatings are extensively used in turbine industry; 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.Thus 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.Both polymer and ceramic particles melt in plasma and after impact onto a substrate they form a coating.When the coating is subjected to heat treatment, polymer burns out and a complex structure of pores and cracks is formed.In order to obtain desired porosity level and microstructural features in coatings; a design of experiments, based on changes in spray distance,powder
Trvalý link: http://hdl.handle.net/11104/0246554