Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Processing and Thermal Properties of S${i_3}{N_4}$-BN Composites

S${i_3}{N_4}$-BN복합재료의 제조 및 열적 특성

  • 이오상 (한국화학연구소 구조재료연구실) ;
  • 박희동 (한국화학연구소 구조재료연구실) ;
  • 이재도 (한국화학연구소 구조재료연구실)
  • Published : 1993.08.01
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Abstract

The silicon oxynitride bonded $Si_3N_4-BN$ composite has been developed based on the selective oxidation behavier of $Si_3N_4$ over BN. The silicon oxynitride phase converted to the reaction between $Si_3N_4$ and $SiO_2$ formed on $Si_3N_4$ powder surface during oxidation treatment at the sintering temperature. The developed composite has excellent high-temperature strength, thermal shock resistance, precision machinability and corrosion resistance to the molten steel. The developed composite may therefore be used as, for example, break ring materials in continuous casting of steel.

${Si_3}{N_4}$와 BN의 선택적 산화반응과 질소분위기 소결에 의하여 $Si_2N_2O$로 결합된$Si_3N_4-BN$복합재료를 개발하였으며, 이때 산화반응 온도와 CaO의 첨가가 $Si_2N_2O$의 생성에 미치는 영향을 고찰하였다. $Si_2N_2O$상이 도입된 $Si_3N_4-BN$복합재료는 내열충격성 및 용강에 대한 내침식성이 우수하여 연속제강새안의 부품인 break ring등의 소재로 사용될 수 있다.

Keywords

References

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