한국세라믹학회지 (Journal of the Korean Ceramic Society)

  • 제30권6호
  • /
  • Pages.449-456
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  • 1993
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  • 1229-7801(pISSN)
  • /
  • 2234-0491(eISSN)
한국세라믹학회 (The Korean Ceramic Society)
권호 표지

지르코니아 분말의 치밀화와 소결거동 : II. 소결거동

Compaction and Sintering Behavior of Zirconia Powders : II. Sintering Behaviour

  • 박홍채 (부산대학교 무기재료공학과) ;
  • 김겸 (부산대학교 무기재료공학과) ;
  • 김영우 (부산대학교 무기재료공학과) ;
  • 이윤복 (부산대학교 무기재료공학과) ;
  • 오기동 (부산대학교 무기재료공학과) ;
  • Park, H.C. (Department of Inorganic Materials Engineering, Pusan National University) ;
  • Kim, K. (Department of Inorganic Materials Engineering, Pusan National University) ;
  • Kim, Y.W. (Department of Inorganic Materials Engineering, Pusan National University) ;
  • Lee, Y.B. (Department of Inorganic Materials Engineering, Pusan National University) ;
  • Oh, K.D. (Department of Inorganic Materials Engineering, Pusan National University) ;
  • Riley, Frank L. (Division of Ceramics, Schoo of Materials, The Univeristy of Leeds)
  • 발행 : 1993.06.01
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초록

Sintering behaviour of zirconia powders prepared by different processing treatment was discussed. About >99% densities of theoretical were obtaiend on sintering at 140$0^{\circ}C$ for 2h in case of 300MPa uniaxially cold-pressed compact. But the lower densities were obtained on sintering above this temperature due to abnormal grain growth enabling the tetragonal to monoclinic phase transformation during cooling resulted in microcracks. All kinds of different dried powders exhibited nearly the same shrinkage behaviour with end-point shrinkage between 19 and 20%, and had maximum shrinkage rate (0.99~1.27%/min) around 120$0^{\circ}C$. During whole sintering process densification was mainly governed by grain growth and rearrangement of agglomerates. Heterogeneous abnormal grain growth and abrupt decrease in shrinkage were observed when continuous interagglomerate pore collapsed into isolated pores.

키워드

참고문헌

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