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Phase Transformation at Oral Enviromental Temperature in CuAu-ln Alloys

Research Project

Project/Area Number 09671997
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 補綴理工系歯学
Research InstitutionNagasaki University

Principal Investigator

KUNIHIRO Hisatsune  Nagasaki University School of Dentistry Professor, 歯学部, 教授 (20037526)

Co-Investigator(Kenkyū-buntansha) HASAKA Masayuki  Nagasaki University Faculty of Engineering Professor, 工学部, 教授 (30039698)
UDOH Koh-ichi  Nagasaki University School of Dentistry Research Associate, 歯学部, 助手 (60145266)
TANAKA Yasuhiro  Nagasaki University School of Dentistry Research Associate, 歯学部, 助手 (10217086)
Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 1998: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1997: ¥3,000,000 (Direct Cost: ¥3,000,000)
KeywordsGold alloy / Phase transformation / Superlattice / Age-hardening / Antiphase domain / Transmission electron microscopy / Electrical resistivity / X-ray diffraction
Research Abstract

Age-hardening behaviors in CuAu-ln alloys were studied by means of electrical resistivity measurements, hardness tests, X-ray diffraction and transmission electron microscopy. Main results are as follows
1 Indium addition in equiatomic CuAu alloy produced remarkable decrease in the critical temperature of CuAu land CuAu II ordered phases and reduced the ordering rate.
2. The ordering in CuAu-ln alloys proceeded in CuAu II phase via aformation of CuAu lphase in the early stage and coexistent state of (CuAu I + CuAu II). CuAu II phase was stabilized by the In addition.
3. Age-hardening was produced in early aging time and maintained for relatively long time.
4. Increase of the axial ratio and decrease of the domain size in CuAu ordered phase were recognized.
5. Indium in CuAu-In alloy was occupied on both sites in CuAu II type superlattice structure.

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (20 results)

All Other

All Publications (20 results)

  • [Publications] Y.Tanaka: "Early Stage of Ordering in Stoichiometric AuCu Alloy" Materials Transaction JIM. 39. 87-94 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] K.Hisatsune: "Martensite Transformation in Au_3Zn Alloy" Solid State Communication. 106. 106-108 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] K.Hamasaki: "Ageing Behaviour in a Dental Low-gold Alloy with High Copper Content" Journal of Materials Science:Materials in Medicine. 9. 213-219 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y.Tanaka: "Distribution of Niobium in an Fe-Pt-Nb Magnet" Materials Science and Engineering. A250. 164-168 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] K.Hisatsune: "Fractal Dimension of Grain Boundary in CuAu Alloys Refined by Platinum Addition" Journal of Materials Science. 33. 4783-4785 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y.Tanaka: "Early Stage of Ordering in Stoichiometric AuCu Alloy" Materials Transaction JIM. 39. 87-94 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] K.Hisatsune: "Martensite Transformation in Au_3Zn Alloy" Solid State Communication. 106. 106-108 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] K.Hamasaki: "Ageing Behavior in a Dental Low-gold Alloy with High Copper Content" Journal of Materials Science : Materials in Medicine. 9. 213-219 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y.Tanaka: "Distribution of Niobium in an Fe-Pt-Nb Magnet" Materials Science and Engineering. A250. 164-168 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] K.Hisatsune: "Fractal Dimension of Grain Boundary in CuAu Alloys Refined by Platinum Addition" Journal of Materials Science. 33. 4783-4785 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y.Tanaka: "Early Stage of Orering in Stoichiometric AuCu Alloy" Materials Transaction JIM. 39. 87-94 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] K.Hisatsune: "Martensite Transformation in Au_3Zn Alloy" Solid State Communication. 106. 106-108 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] K.Hamasaki: "Ageing Behaviour in a Dental Low-gold Alloy with High Copper Content" Journal of Materials Science : Materials in Medicine. 9. 213-219 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Y.Tanaka: "Distribution of Niobium in an Fe-Pt-Nb Magnet" Materials Science and Engineering. A250. 164-168 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] K.Hisatsune: "Fractal Dimension of Grain Boundary in CuAu Alloys Refined by Platinum Addition" Journal of Material Science. 33. 4783-4785 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] A.Sakrana: "A Coherent Phase Diagram of the [(AuCu)0.86Ag0.14]1-xPtx Pseudobinary Section in Au-Cu-Ag-Pt Quaternary System" Dental Materials Journal. 16. 144-155 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] K.Hisatsune: "Phase Transformation in a Dental Gold Alloy for Soldering" Journal of Alloys and Compounds. 261. 308-312 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] T.Morimura: "Microstructure of Mn-doped, Spin Cast FeSi_2" Journal of Electron Microscope. 46. 221-225 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] K.Hisatsune: "Site Occupation of Platinum in CuAu-Pt Alloys" Scripta Materialia. 36. 1161-1165 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] K.Hisatsune: "Aging Reactions in a High Carat Gold Alloy for Porcelain Bonding" Journal of materials Science : Materials in Medicine. 8. 277-282 (1997)

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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