Corrosion behavior of silicon nitride ceramics in aqueous solutions (Part 3). Corrosion behavior in hot sulfuric acid and microstructure of corroded layer

Satoshi Iio, Akira Okada, Tetsuo Asano, Masahiro Yoshimura

研究成果: Article同行評審

11 引文 斯高帕斯(Scopus)

摘要

Corrosion behavior of gas pressure sintered silicon nitride ceramics was investigated in sulfuric acid solution with respect to the effect of solution temperature and to the microstructure of corroded layer. Weight loss of samples after corrosion test was severe in boiling solution as compared with in 90°C solution. Nevertheless strength degradation occurred similarly in each solution. The gradual growth of corrosion is considered to be controlled by the dissolution reaction of grain boundary phase of silicon nitride ceramics in sulfuric acid solution. The drastic strength degradation at initial stage is considered to be ascribed to the relaxation of the residual compressive stress during corrosion which was introduced on surfaces of specimens by machining.

原文English
頁(從 - 到)965-967
頁數3
期刊Journal of the Ceramic Society of Japan. International ed.
100
發行號7
出版狀態Published - 1992 七月 1

All Science Journal Classification (ASJC) codes

  • 工程 (全部)
  • 陶瓷和複合材料

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