TY - JOUR
T1 - Na2SO4‐lnduced Corrosion of Si3N4 Coated with Chemically Vapor Deposited Ta2O5
AU - Lee, Woo Y.
AU - Bae, Yong W.
AU - Stinton, David E.
PY - 1995/7
Y1 - 1995/7
N2 - Hot isostatically pressed Si3N4 was coated with chemically vapor‐deposited Ta2O5, and subjected to oxidative and corrosive environments to determine the feasibility of using a Ta2O5 coating for protecting Si3N4 from hot corrosion. The coated structure was relatively stable at 1000deg;C in pure O2. However, the Ta2O5‐Si3N4 system became unstable in an environment containing Na2SO4 and O2 at 1000deg;C because (1) Ta2O5 and Na2SO4 reacted rapidly to form NaTaO3 and (2) subsequently NaTaO3 interacted destructively with the underlying Si3N4 substrate to form a molten phase.
AB - Hot isostatically pressed Si3N4 was coated with chemically vapor‐deposited Ta2O5, and subjected to oxidative and corrosive environments to determine the feasibility of using a Ta2O5 coating for protecting Si3N4 from hot corrosion. The coated structure was relatively stable at 1000deg;C in pure O2. However, the Ta2O5‐Si3N4 system became unstable in an environment containing Na2SO4 and O2 at 1000deg;C because (1) Ta2O5 and Na2SO4 reacted rapidly to form NaTaO3 and (2) subsequently NaTaO3 interacted destructively with the underlying Si3N4 substrate to form a molten phase.
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U2 - 10.1111/j.1151-2916.1995.tb08911.x
DO - 10.1111/j.1151-2916.1995.tb08911.x
M3 - Article
AN - SCOPUS:0029338879
SN - 0002-7820
VL - 78
SP - 1927
EP - 1930
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
IS - 7
ER -