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Volume 27 Issue 6
Jun.  2001
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Journal of Beijing University of Aeronautics and Astronautics  > 2001  >  27(6): 681-683.
LIU Tong, LIU Wen-ting. Influence of Sintering Temperature on Fracture Toughness for High Toughness Alumina Ceramics[J]. Journal of Beijing University of Aeronautics and Astronautics, 2001, 27(6): 681-683. (in Chinese)
Citation: LIU Tong, LIU Wen-ting. Influence of Sintering Temperature on Fracture Toughness for High Toughness Alumina Ceramics[J]. Journal of Beijing University of Aeronautics and Astronautics, 2001, 27(6): 681-683. (in Chinese)
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Influence of Sintering Temperature on Fracture Toughness for High Toughness Alumina Ceramics

  • 1.

    Tsinghua University, Dept. of Materials Science and Engineering

  • 2. Beijing University of Aeronautics and Astronautics, Dept. of Flight Vehicle Design and Applied Mechanics

  • Received Date: 10 Apr 2000
  • Publish Date: 30 Jun 2001
    Abstract
  • The fracture toughness of hot-pressed alumina ceramics at different sintering temperatures was examined. The high fracture toughness alumina samples were made from low-temperature-calcined α-alumina powder prepared from aluminum hydroxide by seeding of wet grinding abrasion powder. As the sintering temperature increased, the fracture toughness increased to an optimal temperature and then decreased. The fracture toughness is increased by the formation of elongated grain structure and decreased by abnormal grain growth.

     

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  • [1] Yasuoka M,Hirao K,Brito M E, et al. High-strength and high-fracture-toughness ceramics in the Al2O3/LaAl11O18 systems[J]. J Am Ceram Soc, 1995, 78(7):1853~1856. [2] GB-4161.金属材料平面应变断裂韧度试验方法[S]. 1984. [3] 关振铎,张中太,焦金生. 无机材料物理性能[M]. 北京:清华大学出版社,1992. [4] 刘文,郑 仲,费斌军.概率断裂力学与概率损伤容限/耐久性[M]. 北京:北京航空航天大学出版社,1999. [5] 盛 骤,谢式千,潘承毅. 概率论与数理统计[M].北京:高等教育出版社,1979.
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