Partial phase diagram of Au-Ag-Dy ternary system

【Abstract】 On the basis of Au-Ag, Au-Dy and Ag-Dy binary phase diagrams, the 700℃ isothermal section of Au-Ag-Dy ternary system（Dy≤35%, mole fraction） was established by X-ray diffraction analysis, differential thermal analysis and optical microscopy. It is found that there is a long single-phase region, Au（Ag） or Ag（Au）, along the Au-Ag binary isomorphous system on the gold-silver-rich side of the 700℃ isothermal section and between the binary compound Au₂Dy and Ag₂Dy there is the all proportional solid solution, （Au₂Dy） or （Ag₂Dy）. It is confirmed that the partial 700℃ isothermal section consists of six single-phase regions: solid solution Au（Ag） or Ag（Au）, （Au₂Dy） or （Ag₂Dy）, Au₆Dy, Au₅1Dy₁4, Au₃Dy and Ag₅1Dy₁4; nine binary-phase regions: （Au₂Dy）+Au（Ag）, Au₆Dy+Au（Ag）, Au（Ag）+Ag₅1Dy₁4, Ag₅1Dy₁4+（Au₂Dy）, Au₃Dy+（Au₂Dy）, Au₃Dy+Au₅1Dy₁4, Au₅1Dy₁4+Au₆Dy, Au₅1Dy₁4+Au（Ag） and Au（Ag）+Au₃Dy;four ternary regions: Ag₅1Dy₁4+（Au₂Dy）+Au（Ag）, （Au₂Dy）+Au（Ag）+Au₃Dy, Au（Ag）+Au₃Dy+Au₅1Dy₁4 and Au₅1Dy₁4+Au（Ag）+Au₆Dy. No new ternary compound is formed in the gold-silver-rich field（Dy≤35%） of the Au-Ag-Dy ternary system.更多还原