Na2SO4‐lnduced Corrosion of Si3N4 Coated with Chemically Vapor Deposited Ta2O5

Woo Y. Lee, Yong W. Bae, David E. Stinton

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)1927-1930
Number of pages4
JournalJournal of the American Ceramic Society
Volume78
Issue number7
DOIs
StatePublished - Jul 1995

Fingerprint

Dive into the research topics of 'Na2SO4‐lnduced Corrosion of Si3N4 Coated with Chemically Vapor Deposited Ta2O5'. Together they form a unique fingerprint.

Cite this