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Development of toughened zirconia laminate materials

Research Project

Project/Area Number 05452281
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field Composite materials/Physical properties
Research InstitutionThe University of Tokyo

Principal Investigator

ENOKI Manabu  RCAST,The University of Tokyo, Associate Professor, 先端科学技術研究センター, 助教授 (70201960)

Co-Investigator(Kenkyū-buntansha) KISHI Teruo  RCAST,The University of Tokyo, Professor, 先端科学技術研究センター, 教授 (40011085)
Project Period (FY) 1993 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥4,700,000 (Direct Cost: ¥4,700,000)
Fiscal Year 1994: ¥2,400,000 (Direct Cost: ¥2,400,000)
Fiscal Year 1993: ¥2,300,000 (Direct Cost: ¥2,300,000)
Keywordszirconia / laminate / fracture toughness / micro fracture / acoustic emission / 破壊靱性
Research Abstract

Cermics are expected to be high-temperature use materials or high wear resistance materials, but their essential brittleness interfere the pratical application of ceramics. In this research, we have developed the high-toughened zirconia laminates to improve the brittleness of ceramics. It is well known that the fracture toughness of partially stabilized zirconia materials are enhanced to due the stress induced transformation. However, an increase of toughness is limited by the saturation of transformation quantity. We have developed the toughened zirconia laminates with high crack propagation resistance by stacking non-transformed and transformed layrs and by controlling the thickness of layrs.
The thin layrs of ZrO_2-6mol%Y_2O_3, ZrO_2-3mol%Y_2O_3 and ZrO_2-2mol%Y_2O_3 were produced. The pawder was mixed with liquid. Layrs with a constant thickness were obtained by controlling viscosity of slury. The obtained layrs were stacked and hot-pressed. Three types of specimens with different direction of load were prepared by changing the stacking direction.
The four-point bending strength and fracture foughness were measured. Acoustic emission signals during these tests were also measured. The maximum fracture toughness was9MPam^<1/2>. The effect of thickness and composition on mechanical properties was investigated. The ratio of transformation near main crack was measured by X-ray diffraction analysis system. The role of transformation near main crack was analyzed by the acoustic emission characteristics during crack propation and the observation of crasks, and the mechanism of toughening was evaluated.

Report

(3 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] 須藤英幸,榎学,岸輝雄: "ジルコニア積層材のAE特性" 第9回アコースティック・エミッション総合コンファレンス論文集. 193-198 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Manabu Enoki,Hideyuki Sudou and Teruo Kishi: "PROCESSING AND MECHANICAL PROPERTIES OF Y-TZP MULTLAYER COMPOSITES" PROCEEDINGS OF THE THIRD JAPAN INTERNATIONAL SAMPE SYMPOSIUM. 1. 657-660 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] M.Enoki,Y.Utoh and T.Kishi: "Stochastic microfracture process of ceramics" Materinals Science and Engineering. A176. 289-293 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 津田宏,榎学,岸輝雄: "SiC繊維強化ガラスの破壊過程の解析" 日本金属学会誌. 58. 1393-1400 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H,Sudou: "AE Characteristics of Zirconia Laminates" Proceedings of 9th domestic acoustic emission conference. 193-198 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] M,Enoki: "Processing and Mechanical Properties of Y-TZP Multilayr Composites" Proceedings of third Japan international SAMPE symposium. 1. 657-660 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] M,Enoki: "Stochasic microfracture process of ceramics" Materials science and engineering. A176. 289-293 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H,Tuda: "Frasture Process Analysis of SiC Fiber-Reinforced Glasses" Journal of the Japan institute of metals. 58. 1393-1400 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] M.Enoki,Y.Otoh and T.Kishi: "Stochastic microfracture process of ceramics" Materials Science and Engineering. A176. 289-293 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 津田 浩,榎 学,岸 輝雄: "Sic繊維強化ガラスの破壊過程の解析" 日本金属学会誌. 58. 1393-1400 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 須藤 英幸,榎 学,岸 輝雄: "ジルコニア積層材のAE特性" 第9回アコースティック・エミッション総合コンファレンス論文集. 193-198 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Manabu Enoki,Hideyuki Sudou and Teruo Kishi: "PROCESSING AND MECHANICAL PROPER TIES OF Y-TZP MULTLAYER COMPOSITES" PROCEEDINGS OF THE THIRD JAPAN INTERNATIONAL SAMPE SYMPOSIUM. 1. 657-660 (1993)

    • Related Report
      1993 Annual Research Report

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Published: 1993-04-01   Modified: 2016-04-21  

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