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Shape casting of Al2O3-YAG ceramics by using Undercooled melt

Research Project

Project/Area Number 14350400
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Metal making engineering
Research InstitutionOsaka University

Principal Investigator

OHNAKA Itsuo  Osaka University, Graduate School of Engineering, Professor, 大学院・工学研究科, 教授 (00029092)

Co-Investigator(Kenkyū-buntansha) SUGIYAMA Akira  Osaka University, Graduate School of Engineering, Research Associate, 大学院・工学研究科, 助手 (10335375)
YASUDA Hideyuki  Osaka University, Graduate School of Engineering, Associate Professor, 大学院・工学研究科, 助教授 (60239762)
Project Period (FY) 2002 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥11,400,000 (Direct Cost: ¥11,400,000)
Fiscal Year 2003: ¥2,900,000 (Direct Cost: ¥2,900,000)
Fiscal Year 2002: ¥8,500,000 (Direct Cost: ¥8,500,000)
Keywordsceramics / Melt shaping / eutectic reaction / precision casting / microstructure
Research Abstract

There are two eutectic systems in the Al_2O_3-rich portion of the AI_2O_3-Y_2O_3 system: one is the A1_2O_3-YAG equilibrium eutectic system and the other is the A1_2O_3-YAP metastable eutectic system. Heating the A1_2O_3-YAP metastable eutectic structure up to temperatures above the metastable eutectic temperature but below the equilibrium eutectic temperature produced the undercooled melt. Solidification in the equilibrium path immediately followed the undercooled melt formation. The solidification in the equilibrium path along with the melting of the metastable eutectic structure resulted in a fine and uniform equilibrium eutectic structure with lamellar spacing of less than 1 μm. The equilibrium eutectic structure was not affected by the metastable eutectic structure used for the undercooled melt formation. Shape casting and joining of alumina rods were demonstrated using the undercooled melt produced by the melting of is the A1_2O_3-YAP metastable eutectic structure. The fine eutectic structure was obtained throughout the castings. Coupling of the solidification and the melting achieved a higher growth rate than conventional solidification from the undercooled melt. The skewed coupled growth zone due to the kinetic effect contributed to formation of the fine eutectic structure at the metastable eutectic composition.

Report

(3 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] H.Yasuda: "Undercooled melt formation and shaping of Al_2O_3-YAG eutectic ceramics"J.American Ceramics Society. 86/10. 1818-1820 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Yasuda: "Application of an Optical DTA for Morphological Transition in the Al_2O_3-YAP-ZrO_2, Meta stable Eutectic System"ISIJ International. 43/11. 1733-1741 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Y.Mizutai: "Undercooled melt formation by melting of metastable eutectic structure in Al_2O_3-Y_2O_3-ZrO_2 system"Materials Transaction JIM. 43/11. 2847-2854 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Yasuda: "Solidification and Shape casting of Al2O3-YAG eutectic ceramics from the undercooled melt produced by melting Al2O3-YAP eutectics"Science and Technology of Advanced Materials. 5. 207-217 (2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Yasuda, Y.Mizutani, I.Ohnaka, A.Sugiyama, T.Morikawa, Y.Waku: "Undercooled melt formation and shaping of A12O3-YAG eutectic ceramics"J. American Ceramics Society. 86 [10]. 118-1820 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Yasuda, Y.Mizutani, I.Ohnaka, M.Kirihara, T.Sakimura: "Application of an Optical DTA for Morphological Transition in the A12O3-YAP-ZrO2, Metastable Eutectic System"ISIJ International. 43 [11]. 1733-1741 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Y.Mizutani, H.Yasuda, I.Ohnaka, A.Sugiyama, S.Takeshima, M.Kirihara, Y.Waku: "Undercooled melt formation by melting of metastable eutectic structure in A12O3-Y2O3-ZrO2 system"Materials Transaction JIM. 43[11]. 847-2854 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Hideyuki Yasuda, Itsuo Ohnaka, Yoshiki Mizutani, Akira Sugiyama, Takashi Morikawa, Satoshi Takeshima, Takumi Sakimura, Yoshiharu Waku: "Solidification and Shape casting of A12O3-YAG eutectic ceramics from the undercooled melt produced by melting A12O3-YAP eutectics"Science and Technology of Advanced Materials. 5. 207-217 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Yasuda: "Undercooled melt formation and shaping of Al_2O_3-YAG eutectic ceramics"J.American Ceramics Society. 86/10. 1818-1820 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] H.Yasuda: "Application of an Optical DTA for Morphological Transition in the Al_2O_3-YAP-ZrO_2,Metastable Eutectic System"ISIJ International. 43/11. 1733-1741 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] I.Ohnaka: "New eutectic ceramics"Solidification and Casting, Series in Materials Science and Engineering. 373-389 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Y.Mizutani: "Undercooled Melt Formation by Melting of Metastable Eutectic Structure in Al203-Y2O3-ZrO2 System"Materials Transaction. Vol.43 No.11. 2847-2854 (2002)

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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