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

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)23-28
Number of pages6
JournalNippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
Volume109
Issue number1265
DOIs
Publication statusPublished - 2001

All Science Journal Classification (ASJC) codes

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

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