High-temperature chemical stability of plasma-sprayed Ca0.5Sr0.5Zr4P6O24 coatings on nicalon/SiC ceramic matrix composite and Ni-based superalloy substrates

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Title: High-temperature chemical stability of plasma-sprayed Ca0.5Sr0.5Zr4P6O24 coatings on nicalon/SiC ceramic matrix composite and Ni-based superalloy substrates
Author(s): Lee, Woo Young; Cooley, Kevin M.; Berndt, Christopher C.; Joslin, Debra L.; Stinton, David P.
Abstract: The potential application of Ca0.5Sr0.5Zr4P6O24 (CS50) as a corrosion-resistant coating material for Si-based ceramics and as a thermal barrier coating material for Ni-based superalloys was explored. A ∼200 μm thick CS50 coating was prepared by air plasma spray with commercially available powder. A Nicalon/SiC ceramic matrix composite and a Ni-based superalloy coated with a ∼200 μm thick metallic bond coat layer were used as substrate materials. Both the powder and coating contained ZrP2O7 as an impurity phase, and the coating was highly porous as-deposited. The coating deposited on the Nicalon/SiC substrate was chemically stable upon exposure to air and Na2SO4/O2 atmospheres at 1000°C for 100 h. In contrast, the coating sprayed onto the superalloy substrate significantly reacted with the bond coat surface after similar oxidation in air.
Publication type: Journal article
Source: Journal of the American Ceramic Society, Vol. 79, no. 10 (Oct 1996), pp. 2759-2762
Publication year: 1996
Keyword(s): Ceramic coatings; Ceramic matrix composites; Corrosion resistance; High temperature applications; Metallic bond coat layer; Nickel alloys; Oxidation; Plasma spraying; Sprayed coatings; Substrates; Superalloys; Thermal conductivity; Thermal expansion; Thermal insulating materials
Publisher: Wiley-Blackwell Publishing
ISSN: 0002-7820
Publisher URL: http://dx.doi.org/10.1002/chin.199706251
Additional information: This research was supported in part by the Advanced Research and Technology Development Materials Program, Office of Fossil Energy, US Department of Energy; the Advanced Gas Turbine Systems Program, Office of Industrial Technologies; and the Ceramic Technology Project of the Propulsion System Materials Program, Office of Transportation Technologies, under Contract No. DE-AC05-96OR22464 with Lockheed Martin Energy Research Corporation.
Peer reviewed