Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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The Effects of used Alumina Shapes on the Processing of RBAO-SiC Ceramics

알루미나 원료형상이 RBAO-SiC 세라믹스 제조에 미치는 영향

  • Published : 1998.07.01
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Abstract

Reaction bonded $AI_2O_3$(RBAO)-SiC ceramics were prepared from the Al/$AI_2O_3$/SiC powder mixture. The calcined alumina and fused alumina were used as the raw $AI_2O_3$ powder. The same sized (3mm) and differently sized (3mm + Smm) $Zr0_2$ balls were used in attrition milling of starting powders. The effect of $AI_2O_3$ powder shapes on the milling efficiency and reaction sintering was investigated. After attrition milling, isopressed compacts were preheated to 1l00$^{\circ}$C with a heating rate l.5$^{\circ}C$/min and then sintered at the temperature range 1500 to 1$600^{\circ}C$ for S hours with a heating rate 5$^{\circ}C$/min. The powder mixture with fused alumina was effectively comminuted than the mixtures with calcined alumina. And the same sized balls milled more effctive than the differently sized balls. The reaction sintering behavior differed not depending on the shapes of $AI_2O_3$ powder.

반응결합 알루미나(RBAO)-SiC 세라믹스를 AI금속분말/$AI_2O_3$/SiC 분말혼합체로부터 제조하였다. 하소알루미나와 용융알루미나를 알루미나 분말공급원으로 사용하였다. 출발원료는 단일구경(3mm)또는 혼합구경(3mm+5mm)의 $ZrO_2$볼로 어트리션 밀링 하였다. 정수압 성형한 시편을 $1100^{\circ}C$까지$ 1.5^{\circ}C$/mim로 1차소성한 다음,$ 1500^{\circ}C$~$1600^{\circ}C$까지 $5^{\circ}C$/mim으로 2차소성하였다. 용융알루미나와의 분말혼합체가 하소알루미나와의 분말혼합체보다 분쇄가 더욱 잘 되었다. 또한 단일구가 혼합구보다 분쇄에 더욱 효율적이었다. $AI_2O_3$ 형태에 따른 반응소결거동에는 별 차이가 없었다.

Keywords

References

  1. J. Eur. Ceram. Soc. v.5 Low-shrinkage reaction-bonded alumina N.Claussen(et al.)
  2. J. Eur. Ceram. Soc. v.76 no.4 Mechanisms and kinetics of reaction bonded aluminium oxide ceramics S.Wu(et al.)
  3. J. Am. Ceram. Soc. v.77 no.10 Effect of Processing Parameters on Phase and Microstructure Evolution in RBAO Ceramics D.Holz(et al.)
  4. Metall & Mater. Trans. A. v.24A no.9 The Effects of Ball Size Distribution on A ttritor Efficiency T.M.Cook;T.H.Courtney
  5. J. Mater. Sci. v.32 Structure and properties of attrition-milled aluminium powder J.A.Rodriguez(et al.)
  6. 요업학회지 v.31 no.3 산화물과 금속분말의 attrition milling 및 반응소결: Ⅰ. 분말의 특성에 따른 분쇄거동 황규홍;박정환;윤태경
  7. 요업학회지 v.31 no.4 산화물과 금속분말의 attrition milling 및 반응소결: Ⅱ.분말의 분쇄특성에 따른 분쇄거동 황규홍;김의훈
  8. J. Ceram. Soc. Japan v.94 no.8 Microstructure and Mechanical Properties of Al₂O₃-SiC Composites A.Nakahira(et al.)
  9. 요업학회지 RBAO 세라믹스 공정에서 어트리터 효율에 미치는 볼 크기의 영향 김일수;강민수;박정현
  10. 세라믹분체재료학 3.4.5 메카노케미스트리 荒康夫(저);김창은(외 3인 공역)
  11. J. Mater. Sci. v.30 Fast Firing of RBAO Composites D.E.Garcia(et al.)
  12. 요업학회지 v.34 no.5 SiC의 산화에 의한 Al₂O₃/SiC복합체의 제조 김경환;이홍림;이형민;홍기곤
  13. J. Am. Ceram. Soc. v.77 no.11 Mechanical Behavior of Alumina-Silicon Carbide Nanocomposites J.Zhao(et al.)
  14. Am. Ceram. Soc. v.78 no.1 Effect of SiC Submicrometer Particle Size and Content on Fracture Toughness of Alumina-SiC Nanocomposites I.Lavin(et al.)