• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

1991 Fiscal Year Final Research Report Summary

Phase Transformation and Precipitation in Partially-Stabilized Zirconia

Research Project

Project/Area Number 01470061
Research Category

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

Allocation TypeSingle-year Grants
Research Field 金属材料(含表面処理・腐食防食)
Research InstitutionThe university of Tokyo

Principal Investigator

SAKUMA Taketo  Professor, University of Tokyo, 工学部, 教授 (50005500)

Project Period (FY) 1989 – 1991
Keywordszirconia / phase transformation / phase transition / microstructure / precipitation / spinodal decomposition / 微構造
Research Abstract

The microstructure formed by the cubic-to-tetragonal (c-t) transformation was examined in detail. The domain structure and plate-like or lenticular microstructures were developed in tetragonal zirconia (t-ZrO_2) generated by rapid cooling from high-temperature cubic phase (cZrO_2). The c-t transformation was always completed with a formation of the domain structure. The modulated structure characteristic of spinodal decomposition was found in ZrO_2-Y_2O_3 annealed in the c-t two-phase region. From the microstructural evidence, the author has proposed that the c-t transformation has a nature of second-order phase transition.
The thermodynamic analysis on the c-t equilibrium was made by assuming that this transformation is of the second-order type. The result satisfactorily explained the reported c-t equilibrium.

  • Research Products

    (19 results)

All Other

All Publications (19 results)

  • [Publications] T.Sakuma and H.Hata: "The domain structure of tetragonal Zirconia in ZrO_2-Y_2O_3 alloys" Aduances in Zirconia Science and Technology,Ed,by S.Meriani and C.Palmonari. 283-292 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Yoshizawa and T.Sakuma: "Evolution of microstructure and grain growth in ZrO_2-Y_2O_3 alloys" ISIJ International. 29. 746-752 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 佐久間 健人,畠 英雄: "ZrO_2ーY_2O_3の立方晶ー正方晶無拡散変態と微細組織" 日本金属学会誌. 53. 972-979 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Zhou,T.C.Lei and T.Sakuma: "Diftusionless cubic-to-tetragonal phase transition and microstructural evolution in sintered Zirconia-Yttria Ceramics" J.Am.Ceram.Soc.,. 74. 633-640 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Hillert and T.Sakuma: "Thermodynamic modeling of the c→t transtotmation in ZrO_2 alloys" Acta Metall.Mater.39. 1111-1115 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Zhou,Q.L.Ge,T.C.Lei and T.Sakuma: "Diftusional cubic-to-tetragonal phase transtormation and microstructural evlution in ZrO_2-Y_2O_3 ceramics" J.Mater.Sci.,. 26. 4461-4467 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 佐久間 健人: "セラミック材料学" 海文堂, 240 (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T. Sakuma: ""The diffusionless cubic-to tetragonal transition in partially-stabilized zirconia"" MRS International Meeting on Advanced Materials. 9. 505-516 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Sakuma and H. Hata: ""The domain structure of tetragonal zirconia in ZrO_2-alloy"" Zirconia'88, Advances in Zirconia Science and Technology. Elsevier. 283-292 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y. Yoshizawa and T. Sakuma: ""Evolution of microstructure and grain growth in ZrO_2-Y_2O_3 alloys"" ISIJ Int.29. 746-752 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Sakuma, Y. Yoshizawa and Y. Zhou: ""Intercritical annealing in the system ZrO_2-Y_2O_3"" Proc. 1st Jpn. SAMPE Symp.815-820 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Sakuma and H. Hata: ""Diffusionless cubic-to-tetragonal transformation and microstructure in ZrO_2-Y_2O_3"" J. Jpn. Inst. Met.53. 972-979 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Sakuma: ""Phase transformation and microstructure of high-strength toughened zirconia"" Kinzoku. 59. 43-47 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Sakuma: ""Phase transformation and microstructure of high-strength toughened zirconia"" Refractory Material. 138. 9-19 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y. Zhou, Q, L. Ge, T. C. Lei and T. Sakuma: ""Microstructure and mechanical properties of ZrO_2-2mol%Y_2O_3 ceramics"" Ceram. Int.16. 349-354 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Sakuma: ""Phase transformation in zirconia ceramics"" New Ceramics. 4. 53-56 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y. Zhou, T. C. Lei and T. Sakuma: ""Diffusionless cubic-to-tetragonal phase transition and microstructural evolution in sintered zirconia-yttria ceramics"" J. Am. Ceram. Soc.74. 633-640 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Hillert and T. Sakuma: ""Thermodynamic modeling of the c-t transformation in ZrO_2 alloys"" Acta Metall. Mater.39. 1111-1115 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y. Zhou, Q. L. Ge, T. C. Lei and T. Sakuma: ""Diffusional cubic-to-tetragonal phase transformation and microstructural evolution in ZrO_2-Y_2O_3 ceramics"" J. Mater. Sci.26. 4461-4467 (1991)

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 1993-03-16  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi