Corrosion behavior of silicon nitride ceramics in aqueous solutions (Part 1). Effects of testing condition and various corrosive solutions

Akira Okada, Satoshi Iio, Tetsuo Asano, Akira Kokaji, Hideo Takahashi, Masahiro Yoshimura

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Corrosion test of gas-pressure sintered silicon nitride with the additions of yittria and alumina was carried out under various testing conditions. As a result compared with specimens sustained in 6N-H2SO4 and those placed at the bottom of glass containers, no significant differences were observed in weight and bending strength. Also, there was no distinctive observation in the test at 90°C and boiling sulfuric acid. Silicon nitride was found to be corroded more severely in H2SO4 and H3PO4 than NaOH and H2O. In addition, the test in boiling water resulted in strength degradation of the specimens, while weight change was not detected through corrosion. Relationship between bending strength and weight loss indicated that the rapid decrease of the strength has taken place at below 0.1 mg/cm2 of weight loss.

Original languageEnglish
Pages (from-to)1260-1264
Number of pages5
JournalNippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
Volume99
Issue number1156
DOIs
Publication statusPublished - 1991

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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