Abstract
Studies on plasma spraying of zircon (ZrSiO4) have been carried out by the authors as one of the candidates for an environmental barrier coating (EBC) application, and had reported that substrate temperature is one of the most important factors to obtain crack-free and highly adhesive coating. In this study, several amounts of yttria were added to zircon powder, and the effect of the yttria addition on the structure and properties of the coatings were evaluated to improve the stability of the zircon coating structure at elevated temperature. The coatings obtained were composed of yttria-stabilized zirconia (YSZ), glassy silica, whereas the one prepared from monolithic zircon powder was composed of the metastable high temperature tetragonal phase of zirconia and glassy silica. After the heat treatment over 1200 °C, silica and zirconia formed zircon in all coatings. However, coatings with higher amounts of yttria exhibited lower amounts of zircon. This resulted in the less open porosity of the coating at elevated temperature. These yttria-added coatings also showed good adhesion even after the heat treatment, while monolithic zircon coating pealed off.
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References
A. M. Wong, R. McPherson, The Structure of Plasma Dissociated Zircon, J. Mater. Sci, Vol. 16, 1981, p. 1732-1735
K. Kuroda, S. Hanagiri, M. Suginoshita, H. Taira, S. Tamura, H. Saka, T. Imura, Microstructural Characterization of Plasma-Sprayed Oxide Ceramics, ISIJ Int., Vol. 29 (No.3), 1989, p. 234-239
R. Ramaswamy, S. Seetharamu, K.B.R. Varma, K.J. Rao, Thermal Barrier Coating Application of Zircon Sand, J. Thermal Spray Tech., Vol. 8 (No.3), 1999, pp. 447-453
Y. Li, A.K. Khor, A Study of Processing Parameters in Thermal-Sprayed Alumina and Zircon Mixtures, J. Thermal Spray Tech., Vol. 11 (No.2), 2002, pp.186-193
W.C. Butterman, W.R. Foster, Zircon Stability and ZrO2-SiO2 Phase Diagram, Am. Mineral., Vol. 52, 1953, p. 880-888
K.N. Lee, R.A. Miller, Oxidation Behavior of Mullite-Coated SiC and SiC/SiC Composites under Thermal Cycling between Room Temperature and 1200°C-1400°C, J. Am. Ceram. Soc., Vol. 79 (No.3), 1996, pp. 620-626
K.N. Lee. Current Status of Environmental Barrier Coating for Si-Based Ceramics, Surf. Coat. Tech., Vol. 133-134, 2000, pp. 1-7
M. Moldovan, C.M. Weyant, D. Lynn Johnson, K.T. Faber, Tantalum Oxide Coatings as Candidate Environmental Barriers, J. Thermal Spray Tech., Vol. 13 (No.1), 2004, pp. 51-56
S. Latzel, R. Vaβen, D. Stöver, New Environmental Barrier Coating System on Carbon-Fiber Reinforced Silicon Carbide Composites, J. Thermal Spray Tech., Vol. 14 (No.2), 2005, pp. 268-272
M. Suzuki, S. Sodeoka, T. Inoue, K. Ueno, Effect of Heat Treatment on Plasma-Sprayed Zircon (ZrSiO4), Mater. Manuf. Process, Vol. 13 (No.4), 1998, p. 575-580
M. Suzuki, S. Sodeoka, T. Inoue, Structure Control of Plasma Sprayed Zircon Coating by Substrate Preheating and Post Heat Treatment, Mater. Trans., Vol. 46 (No. 3), 2005, p. 669-674
H.G. Scott, Phase Relationships in the Zirconia-Yttria system, J. Mater. Sci., Vol. 10 (No.9), 1975, p. 1527-1535
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Suzuki, M., Sodeoka, S. & Inoue, T. Zircon-Based Ceramics Composite Coating for Environmental Barrier Coating. J Therm Spray Tech 17, 404–409 (2008). https://doi.org/10.1007/s11666-008-9178-0
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DOI: https://doi.org/10.1007/s11666-008-9178-0