Feasibility of suspension spraying of yttria-stabilized zirconia with water-stabilized plasma torch

0452251 - ÚFP 2016 RIV CH eng J - Článek v odborném periodiku
Mušálek, Radek - Bertolissi, Gabriele - Medřický, J. - Kotlan, Jiří - Pala, Zdeněk - Curry, N.
Feasibility of suspension spraying of yttria-stabilized zirconia with water-stabilized plasma torch.
Surface and Coatings Technology. Roč. 268, April (2015), s. 58-62. ISSN 0257-8972.
[Rencontres Internationales de la Projection Thermique/6./. Limoges, 11.12.2013-13.12.2013]
Grant CEP: GA ČR(CZ) GPP108/12/P552
Institucionální podpora: RVO:61389021
Klíčová slova: Thermal spray coating * Suspension spraying * Thermal barrier coating * Water-stabilized plasma * High enthalpy plasma
Kód oboru RIV: JK - Koroze a povrchové úpravy materiálů
Impakt faktor: 2.139, rok: 2015
http://www.sciencedirect.com/science/article/pii/S025789721400680X

Thermal spraying of suspensions allows preparation of coatings from submicron-sized powders but demands a source of heat with a high enthalpy in order to provide an appropriate thermal treatment of the liquid feedstock during the in-flight stage so that the solvent may be evaporated, dispersed particles melted and accelerated towards the substrate to form a coating. Water-stabilized plasma (WSP) torch developed at the Institute of Plasma Physics AS CR, v.v.i. provides such a heat source with high enthalpy, high velocity of the plasma and, when compared to high-enthalpy gas-stabilized plasma (GSP) torches, relatively cheap operation. In this study, results of our experiments with suspension spraying of yttria-stabilized zirconia (YSZ) with WSP torch are presented and demonstrate that coating deposition with a high feed rate is possible with WSP technology. Formation of both columnar "cauliflower" microstructure and segmentation cracks was achieved.
Trvalý link: http://hdl.handle.net/11104/0253277