Hot-corrosion behavior of silicon nitride-bonded silicon carbide

Sang Kook Woo, In Sub Han, Gyeong Geun Ri, Sung Chul Park, Kurn Cho, Byung Koog Jang

研究成果: Contribution to journalArticle査読

2 被引用数 (Scopus)

抄録

In this work, the hot-corrosion behavior of silicon nitride-bonded silicon carbide composite (SCN) in aluminum melt are studied especially on the similar environment to the actual working condition. The thermal shock resistance and cyclic thermal shock behavior of this composite are also studied. Pre-oxidized specimens corroded more extensively than as-cut specimens in Al melt at the same temperature. The specimens, which were pre-oxidized and immersed in Al melt, showed a severe reduction in their mean compressive strength. The mass changes of SCN oxidized at 850 °C-1200 °C followed parabolic kinetics but pore neck blocking happened at 1200 °C. The activation energy was found to be 223 kJ/mol. In water quenching test of SCN composite, the critical thermal shock temperature difference was about 425 °C. The repeated thermal stress by the cyclic heating and cooling caused the decrease in strength.

本文言語英語
ページ(範囲)23-28
ページ数6
ジャーナルNippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
109
1265
DOI
出版ステータス出版済み - 2001
外部発表はい

All Science Journal Classification (ASJC) codes

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

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