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High‐Temperature Chemical Stability of Plasma‐Sprayed Ca05Sr05Zr4P6O24 Coatings on Nicalon/SiC Ceramic Matrix Composite and Ni‐Based Superalloy Substrates
Author(s) -
Lee Woo Y.,
Cooley F Kevin M.,
Berndt Christopher C.,
Joslin Debra L.,
Stinton David P.
Publication year - 1996
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1996.tb09045.x
Subject(s) - materials science , coating , superalloy , ceramic , layer (electronics) , metallurgy , composite material , thermal spraying , composite number , substrate (aquarium) , thermal stability , microstructure , chemical engineering , engineering , oceanography , geology
The potential application of Ca05Sr05Zr4P6O24 (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 (xm 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 (xm 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.