Korean Journal of Crystallography (한국결정학회지)

Korean Crystallographic Association (한국결정학회)
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Influence of $Al_2O_3$ Particle Size on the Fracture Toughness of Alumina-dispersed 2Y-TZP Ceramics

알루미나 분산 2Y-TZP 세라믹스에서 알루미나 입자크기가 파괴인성에 미치는 영향

  • Kim, M.J. (Division of Metallurgical & Materials Engineering, Chosun University, B.K 21, Development of Intelligent Materials and Its Application) ;
  • Lee, J.K. (Division of Metallurgical & Materials Engineering, Chosun University, B.K 21, Development of Intelligent Materials and Its Application) ;
  • Lee, E.G. (Division of Metallurgical & Materials Engineering, Chosun University, B.K 21, Development of Intelligent Materials and Its Application) ;
  • Jang, W.Y. (Division of Metallurgical & Materials Engineering, Chosun University, B.K 21, Development of Intelligent Materials and Its Application)
  • 김민정 (조선대학교 금속.재료공학부 B.K 21, 핵심분야 지능재료 개발 및 산업화 사업단) ;
  • 이종국 (조선대학교 금속.재료공학부 B.K 21, 핵심분야 지능재료 개발 및 산업화 사업단) ;
  • 이은구 (조선대학교 금속.재료공학부 B.K 21, 핵심분야 지능재료 개발 및 산업화 사업단) ;
  • 장우양 (조선대학교 금속.재료공학부 B.K 21, 핵심분야 지능재료 개발 및 산업화 사업단)
  • Published : 2000.06.01
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Abstract

20vol% Al2O3-dispersed 2Y-TZP ceramics was prepared by mixing of 2Y-TZP and Al2O3 powder with different particle sizes, and investigated the influence of Al2O3 particle size and sintering condition on the microstructure and fracture toughness. Sintering conditions of the Al2O3-dispersed 2Y-TZP specimens showed high density at sintering condition of 1350℃ and 1500℃ for 1∼5h, and homogeneous microstructure. The grain size of tetragonal zirconia and the fracture toughness increased with the size of dispersed Al2O3 particle. The highest fracture toughness (∼17.2MPa·m1/2) of all specimens was obtained in the specimens with dispersed Al2O3 particle size of 1.0㎛ and sintered at 1500℃ for 2h.

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