Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Mechanical Properties of Alumina-Glass Dental Composites Prepared from Aqueous-Based Tape Casting

수계공정에 의한 알루미나 테이프로 제조한 세라믹 인공치관용 알루미나 유리 복합체의 기계적 물성

  • 이명현 (한국과학기술연구원 재료연구부) ;
  • 김대준 (한국과학기술연구원 재료연구부) ;
  • 이득용 (대림대학 금속재료과) ;
  • 이정훈 (연세대학교 세라믹공학과) ;
  • 김창은 (연세대학교 세라믹 공학과)
  • Published : 1999.10.01
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Abstract

Alumina-glass composites which are considered as the material of the choice for all dental crown was prepared by aqeous-based tape casting and sintering for 2h at 1120$^{\circ}C$ followed by glass infiltration for 2h at 1100$^{\circ}C$ Biaxial strength and fracture toughness of the composites were evaluated to determine the optimum composition of the tape as a function of the amount of constituent such as alumina binder and plasticizer. The strength and the fracture toughness of the alumina tape increased with increasing the contents of alumina and binder. These observations are consistent with in fluence of the constituents on mean alumuna particle distance in tapes suggesting that high strength of the glass infiltrated alumina composites is related to toughening by crack bowing. The biaxial strength and the fracture toughness of the composite containing the optimum constituent composition were 523 MPa and 3.3 MPa$.$1/2 respectively.

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References

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