한국재료학회지 (Korean Journal of Materials Research)

  • 제5권7호
  • /
  • Pages.888-896
  • /
  • 1995
  • /
  • 1225-0562(pISSN)
  • /
  • 2287-7258(eISSN)
한국재료학회 (Materials Research Society of Korea)
권호 표지

Al첨가에 의한 무수축 Mullite-$ZrO_2$ 요업체의 제조에 관한 연구

A Study on the Fabrication of Shrinkage-Free Mullite--$ZrO_2$ Ceramics with Al-Additives

  • 김정욱 (비금속재료연구소, TU Claustal, 독일) ;
  • 김일수 (동의대학교 재료공학과)
  • 발행 : 1995.10.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Al 금속분말을 zircon sand (ZrSiO$_4$)와 A1$_2$O$_3$혼합체에 첨가하여 반응소결시킴으로써 무수축 Mullite-ZrO$_2$, 요업체를 얻고자 하였다. 반응식, 3(Al+Al$_2$O$_3$)+2ZrSiO$_4$$\longrightarrow$3A1$_2$O$_3$ .2SiO$_2$+2ZrO$_2$에 의하여 ZrO$_2$-강화 Mullite 요업체를 제조하였다. Al 분말은 A1$_2$O$_3$에 대해 0-30 무게 퍼센트까지 대체하였다. 평량한 분말을 볼밀하여 혼합 분쇄한 후, 정수압 성형하여 시편을 제조하고, 온도범위 1450-1$600^{\circ}C$에서 3시간 반응소결시켰다. Al의 충분한 산화를 위해, 한편으로는 125$0^{\circ}C$에서 5시간동안 열처리를 거친후 소성온도로 올리기도 했다. Al을 첨가함으로서 반응은 촉진되었으며, 소성수축도 산화한 Al의 부피팽창에 의해 상쇄되어, 무수축요업체 제조의 가능성을 보였다. 박편모양을 한 비교적 큰 Al분말이 잘 분쇄되지 않음으로 해서, Al이 자리했던 곳에 큰 기공을 남겼다.

In this paper the manufacture of shrinkage-free in situ Mullite-ZrO$_2$ceramics through the addition of Al base metal powder to the mixture of ZrSiO$_4$and A1$_2$O$_3$was attempt. The ZrO$_2$-strengthened mullite ceramics was prepared after the following reaction form, 3(Al+Al$_2$O$_3$)+2ZrSiO$_4$longrightarrow3A1$_2$O$_3$.2SiO$_2$+2ZrO$_2$Al metal powder was added from none to 30 weight percent to the A1$_2$O$_3$. The powders were mechanically mixed, isostatically pressed and reaction sintered at 1450-1$600^{\circ}C$ for 3hours. The specimens were sintered with and without intrim soaking time for 5 hours at 125$0^{\circ}C$ for the oxidation of Al-powder The addition of aluminium accelerates the reaction and compensate the shrinkage during the sintering through an increase in volume of oxidized Al. Because coarse flake type Al metal powders were not effectively milled, oxidized Al resulted in the relative large pore in the specimen.

키워드

참고문헌

  1. Cearmic Transactions v.6 A review of powder preparation methods and densification procedures for fabricating high density mullite M.D. Sacks(et al.)
  2. Br. Ceram. Trans. J. v.89 Preparation and properties of mullite grain T.J. Davies(et al.)
  3. J. Am. Ceram. Soc. v.63 no.3-4 Mechanical properties of sintered, in situ-reacted mullite-zirconia composites N. Claussen;J.W. Jahn
  4. Cearmic Transactions v.6 Mechanical properties and microstructures of mullite-zirconia composites A. Leriche
  5. J. Am. Ceram. Soc. v.74 High temperature characterization of reaction-sintered mullite-zirconia composites P. Descamps(et al.)
  6. Ceramic transactions v.6 Reaction-sintered mullite-zirconia and mullite-zirconia-SIC ceramics S. Moya
  7. J. Mater.Sci. v.26 Effect of CeO₂on mullite-zirconia ceramics J.M. Wu;C.M. Lin
  8. Keram. Z. v.43 Mullit-ZrO₂-Keramik mit zusatzen von Bentonit, Speckstein und MnO+TiO₂ I.S. Kim;H.W. Hennicke
  9. J. Mater. Sci. v.14 Reaction hot-pressing of zircon-alumina mixtures E. Di Rupo(et al.)
  10. Cearmic Transactions v.6 High-purity mullite ceramics by reaction sintering P. Boch(et al.)
  11. J. Ceram. Soc. Jpn. v.98 Preparation of ZrSiO₄powder using sol-gel process(Part Ⅰ)-Influence of starting materials and seeding H. Kobayashi(et al.)
  12. Abstracts of Annual Meeting of the Ceramic Society of Japan,Paper No.3H06 Mechanical properties of mullite-zirconia composites prepared by various methods T. Koyama(et al.)
  13. Adv. Ceram. v.12 Microstructure and property development of in situ reacted mullite-ZrO₂composites J.S. Wallace(et al.)
  14. 요업재료의 과학과 기술 v.9 no.6 용융산화법으로 제조한 세라믹기 복합재료 김일수
  15. 요업학회지 v.20 no.1 첨가된 알루미늄의 산화가 알루미나의 소결에 미치는 영향 : Ⅰ. 공기중, 1350-1550℃에서 박정현;안주삼;김해두
  16. J. Eur. Ceram. Soc. v.5 Low-shrinkage reaction-bonded alumina N. Claussen(et al.)
  17. Ceram. Eng. Sci. Proc. v.11 no.7-8 Tailoring of reaction-bonded Al₂O₃(RBAO) ceramics N. Claussen(et al.)
  18. J. Am. Ceram. Soc. v.76 Mechanisms and kinetics of reaction-bonded aluminium oxide ceramics S. Wu(et al.)
  19. J. Mater Sci. v.20 Multicomponent toughened ceramic materials obtained by reaction sintering P. Pena(et al.)
  20. J. Am. Ceram. Soc. v.74 Fabrication and properties of low-shrinkage reaction bonded mullite S. Wu;N. Claussen
  21. Keram. z. v.45 Schwindungfreie Mullit-Keramik aus Kaolin und Al-pulver I.S. Kim
  22. Ceram. Eng. Sci. Proc. v.11 no.7-8 Preparation and Characterization of reaction-bonded Al₂O₃(RBAO) matrix SiC particulate filler composites A.G. Gessing(et al.)
  23. Structural Cearmics-Processing,Microstructures and Properties Processing of reaction-bonded Al₂O₃(RBAO) composites S. Wu(et al.);J.J. Bentzen(et al.)(ed.)
  24. 요업학회지 v.31 no.3 산화물과 금속분말의 attrition miliing 및 반응소결 : Ⅰ. 분말의 특성에 따른 분쇄거동 황규홍;박정환;윤태경
  25. 요업학회지 v.31 no.4 산화물과 금속분말의 attrition Milling 및 반응소결 : Ⅰ.분말의 분쇄특성에 따른 반응소결거동 황규?;김의훈