TY - JOUR
T1 - Characterization of Si3N4 coated with chemically-vapor-deposited mullite after Na2SO4-induced corrosion
AU - Lee, Woo Y.
AU - More, Karren L.
AU - Stinton, David P.
AU - Bae, Yong W.
PY - 1996/9
Y1 - 1996/9
N2 - Si3N4 substrates coated with chemically-vapor-deposited, crystalline mullite (3Al2O3·2SiO2) were subjected to a corrosive environment containing Na2SO4 and O2 at 1000°C for 100 h. The composition and microstructure of the as-deposited and corroded specimens were examined and compared. The coating appeared to be effective in preserving and therefore protecting the surface microstructure of the underlying Si3N3 substrates. However, a small degree of Na penetration through mullite grain boundaries was observed to a coating depth of ∼1 μm.
AB - Si3N4 substrates coated with chemically-vapor-deposited, crystalline mullite (3Al2O3·2SiO2) were subjected to a corrosive environment containing Na2SO4 and O2 at 1000°C for 100 h. The composition and microstructure of the as-deposited and corroded specimens were examined and compared. The coating appeared to be effective in preserving and therefore protecting the surface microstructure of the underlying Si3N3 substrates. However, a small degree of Na penetration through mullite grain boundaries was observed to a coating depth of ∼1 μm.
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U2 - 10.1111/j.1151-2916.1996.tb09003.x
DO - 10.1111/j.1151-2916.1996.tb09003.x
M3 - Article
AN - SCOPUS:0030243091
SN - 0002-7820
VL - 79
SP - 2489
EP - 2492
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
IS - 9
ER -