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

Coherent Phase Diagram of Au-Cu-Pt Ternary System by High Resolution Electron Microscopy

Research Project

Project/Area Number 07457475
Research Category

Grant-in-Aid for Scientific Research (B)

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

Principal Investigator

UDOH Koh-ichi (1996-1997)  Nagasaki University Instructor School of Dentistry, 歯学部, 助手 (60145266)

安田 克廣 (1995)  長崎大学, 歯学部, 教授 (50013884)

Co-Investigator(Kenkyū-buntansha) TANAKA Yasuhiro  Nagasaki University Instructor School of Dentistry, 歯学部, 助手 (10217086)
HISATSUNE Kunihiro  Nagasaki University Professor School of Dentistry, 歯学部, 教授 (20037526)
有働 公一  長崎大学, 歯学部, 助手 (60145266)
Project Period (FY) 1995 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥7,800,000 (Direct Cost: ¥7,800,000)
Fiscal Year 1997: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1996: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1995: ¥5,300,000 (Direct Cost: ¥5,300,000)
KeywordsGold alloy / Platinum / Dental Precious alloy / Age-hardening / Order-disorder transformation / Transmission electron microscopy / Selected area diffraction / X-ray diffraction
Research Abstract

Acoherent phase diagram of the AuCu-Pt pseudobinary system was determined mainly by means of TEM bright- and dark-field imaging and selected area electron diffraction techniques according to the hypothesis of Allen and Cahn, because a coherent phase diagram gives us more effective information to predict phase transformations related to age-hardening characteristics in an alloy system than an equilibrium phase diagram.
The following phase regions were found in the present experiments ; (1) alpha_0 single-phase of fcc disordered solid solution region ; (2) AuCu I(L1_0)fct ordered single-phase region ; (3) long-period orthorhombic superstructure AuCu II(L1_<0-S>)single-phase region ; (4) alpha + AuCu I region of two coexisting phases ; (5) AuCu I + AuCu II region of two coexisting phases ; (6) alpha + AuCu I + AuCu II region of three coexisting phases.

Report

(4 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • 1995 Annual Research Report
  • Research Products

    (22 results)

All Other

All Publications (22 results)

  • [Publications] K.Hamasaki: "Ageing behaviour in a dental low gold alloy with high copper content" Journal of Materials Science:Materials in Medicine. 9. (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] A.Sakrana: "A coherent phase diagram of the[(AuCu)_<0.86>]_<1-x>Pt_x pseudobinary section in Au-Cu-Ag-Pt quaternary system" Dental Materials Journal. 16. 144-155 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Hisatsune: "Phase transformation in a dental gold alloy for soldering" Journal of Alloys & Compounds. 261. 308-312 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K-I.Udon: "Structural aspects of AuCuI or AuCu II and a cuboidal block configuration of f.c.c.disordered phase in AuCu-Pt and AuCu-Ag pseudobinary alloys" Materials Science and Engineering. A203. 154-164 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] A.M.El Araby: "Age-hardening characteristics of (AuCu)_<1-x>-Pt_x pseudobinary alloys" Materials Science and Engineering. A206. 290-301 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Hisatsune: "Three stages of ordering in CuAu" Intermetallics. 3. 335-339 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 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. (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] A.Sakrana: "Acoherent phase diagram of the[ (AuCu)_<0.86>Ag_<0.14>]_<1-X>Pt_X pseudobinary section in Au-Cu-Ag-Pt quaternary system" Dental Materials Journal. 16. 144-155 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Hisatsune: "Phase transformation in a dental gold alloy for soldering" Journal of Alloys and Compounds. 261. 308-312 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K-I.Udoh: "Structural aspects of AuCu lor AuCu II and a cuboidal block configuration of f.c.c. disordered phase in AuCu-Pt and AuCu-Ag pseudobinary alloys" Materials Science and Engineering. A203. 154-164 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] A.M.El Araby: "Age-hardening characteristics of (AuCu)_<1-X>-Pt_X pseudobinary alloys" Materials Science and Engineering. A206. 290-301 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Hisatsune: "Three stages of ordering in CuAu" Intermetallics. 3. 335-339 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 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. (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] A.Sakrana: "A coherent phase diagram of the[(AuCu)_<0.86>Ag_<0.14>]_<1-X>Pt_X 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 & Compounds. 261. 308-312 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] K-I.Udoh: "Structural aspects of AuCu I or AuCu II and a cuboidal block configuration of f.c.c.disordered phase in AuCu-Pt and AuCu-Ag pseudobinary alloys" Materials Science and Engineering. A203. 154-164 (1995)

    • Related Report
      1997 Annual Research Report
  • [Publications] A.M.El Araby: "Age-hardening characteristics of (AuCu)_<1-X>-Pt_X pseudobinary alloys" Materials Science and Engineering. A206. 290-301 (1995)

    • Related Report
      1997 Annual Research Report
  • [Publications] K.Hisatsune: "Three stages of ordering in CuAu" Intermetallics. 3. 335-339 (1995)

    • Related Report
      1997 Annual Research Report
  • [Publications] K.-I.Udoh: "Structural aspect of AuCuI or AuCuII and a cuboidal block configuration of f.c.c. disordered phase in AuCu-Pt and AuCu-Ag pseudobinary alloys" Materials Science and Engineering. A203. 154-164 (1995)

    • Related Report
      1996 Annual Research Report
  • [Publications] A.M.El Araby: "Age-hardening characteristics of (AuCu)1-X-PtX psesudobinary alloys" Materials Science and Engineering. A206. 290-301 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] K.-I.Udoh: "Structural aspect of AuCu I or AuCu II and a cuboidal block configuration of f.c.c.disordered phase in AuCu-Pt and AuCu-Aq pseudobinary alloys" Materials Science and Engineering. A203. 154-164 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] A.M.E1 Araby: "Age-hardening characteristics of (AuCu)_<1-x>-Pt_x pseudobinary alloys" Materials Science and Engineering. A206. 290-301 (1996)

    • Related Report
      1995 Annual Research Report

URL: 

Published: 1995-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi