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Phase equilibrium and transition of ZrO2 ceramics

Research Project

Project/Area Number 04453055
Research Category

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

Allocation TypeSingle-year Grants
Research Field Physical properties of metals
Research InstitutionUniversity of Tokyo

Principal Investigator

SAKUMA Taketo  Univ.Tokyo Eng.Prof., 工学部, 教授 (50005500)

Project Period (FY) 1992 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥6,400,000 (Direct Cost: ¥6,400,000)
Fiscal Year 1993: ¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1992: ¥4,500,000 (Direct Cost: ¥4,500,000)
KeywordsZrO2 / Transformation / Transition / Microstructure / Structure / phase equilibrium / 微構造 / スピノーダル分解
Research Abstract

There is two totally different interpretation about the mechanism of the c-t transition of ZrO2 based ceramics. One, which is proposed by Prof.Heuer, is that the transition is resulted from the first order type and the other, which is proposed by the author, is second type. The first interpretation has been popular in the field of ZrO2 ceramics since the author's invited presentation at the international conference of ZrO2 held in Australia on 1992. At this conference the author has cleared up that many experimental results can not be interpretated from the standing point that the transition is the first type and has confirmed that there is no contradictions when that transition is thought to be second order type. Moreover the author has made clear that various experimental results are resulted from the vacancies of oxygen in the fluorite lattice structure. When the oxygen ions move from the idea position in the fluorite structure by the introduction of the oxygen vacancies, there is the possibility that the type of this transition is mistaken for the first type.

Report

(3 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • Research Products

    (20 results)

All Other

All Publications (20 results)

  • [Publications] K.Miyazawa,K.Suzuki and T.Sakuma: "HREM observation of domain boundaries in Tetragonal zirconia" Philos.Mag.,. B67. 595-599 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Sakuma: "The cubic-to-tetragonal transformation in Zirconia alloys" Science and Technology of Zirconia V. 86-98 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Sakuma,T.Seki and T.Yamamoto: "The diffusionless cubic-to-tetragonal transition in ZvO_2-R_2O_3(R:rare earths)" Proc.of ICCMAT'92. (printing).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] S.Torng,K.Miyazawa and T.Sakuma: "The role of oxgen vacancies on the cubic-to-tetragonal phase transition in ZvO_2-CeO_2" Mat.Sci.Tech.(printing).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] S.Torng,K.Miyazawa and T.Sakuma: "Microstructual of cubic and tetragonal Zirconia in ZvO_2-CcO_2" Proc.of MRS. (printing).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] K.Miyazawa, K.Suzuki and T.Sakuma: "HREM observation of domain boundaries in tetragonal zirconia" Philos.Mag.B67. 595-599 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Sakuma: "The cubic-to-tetragonal transformation in Zirconia alloys" Science and Technology of Zirconia. V. 86-98 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Sakuma, T.Seki and T.Yamamoto: "The diffusionless cubic-to-tetragonal transition in ZrO2-R2O3 (R : rare earths)" Proc.of ICOMAT '93. (printing).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] S.Torng, K.Miyazawa and T.Sakuma: "The role of oxygen vacancies on the cubic-to-tetragonal phase transition in ZrO2-CeO2" Mat.Sci.Tech.(printing).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] S.Torng, K.Miyazawa and T.Sakuma: "Microstructure of cubic and tetragonal zirconia in ZrO2-CeO2" Proc.MRS. (printing).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] K.Miyazawa,K.Suzuki and T.Sakuma: "HREM observahon of domain boundaries in tetragonal zirconia" Philos.Magy.B67. 595-599 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] T.Sakuma: "The cubic-to-tetragonal transformation in zirconia alloys" Science and Technology of Zirconia V. 86-98 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] T.Sakuma,T.Seki and T.Yamamoto: "The diffusionless cubic-to-tetragonal transition in ZrO_2-R_2O_3(R:rare earths)" ICOMAT'92 国際会議報告. (印刷中).

    • Related Report
      1993 Annual Research Report
  • [Publications] S.Torng,K.Miyazawa and T.Sakuma: "The role of oxygen vacancies on the cubic-to-tetragonal phase transition in ZrO_2-CeO_2" Mater.Sci.Tech.(印刷中).

    • Related Report
      1993 Annual Research Report
  • [Publications] S.Torng,K.Miyazawa and T.Sakuma: "Microstructure of cubic and tetragonal zirconia in ZrO_2-CeO_2" MRS国際会議報告. (印刷中).

    • Related Report
      1993 Annual Research Report
  • [Publications] T.Sakuma and Y.Yoshizawa: "The grain grouth of zirconia during annealing in the cubic/tetragonal two-phase region" Mater,Sci.Forum. 94-96. 125-130 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] T.Sakuma: "Heat treatment and Microstructure of portially-stabilized zirconia" “Heat and Surface '92"Ed,by I.Tamura The Jpn,Soc,Heat Treatment. 235-240 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] K.Miyazawa,K.Suzuki and T.Sakuma: "HREM observation of domain boundaries in tetragonal zirconia" Philos.Mag,.

    • Related Report
      1992 Annual Research Report
  • [Publications] T.Sakuma,T.Seki and T.Yamamoto: "The diffusionless cubic-to-tetragonal transition in ZvO_2-R_2O_3(R:rave earths)" ICOMAT '92 国際会議報告.

    • Related Report
      1992 Annual Research Report
  • [Publications] T.Sakuma: "The cubic-to-tetragonal transformation in Zirconia alloys" 第5回 ジルコニア国際会議報告.

    • Related Report
      1992 Annual Research Report

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Published: 1992-04-01   Modified: 2016-04-21  

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