Au-Ag-Gd(Gd≤33.3%)三元系合金相图700℃等温截面

700℃ Isothermal Section of Au-Ag-Gd(Gd≤33.3%)Ternary System Phase Diagram

采用X射线衍射、DTA差热分析和显微金相分析等方法研究了Au -Ag -Gd三元系相图的富Au -Ag区域 (Gd≤ 33 3% ;原子数分数 ,下同 ) ,测定了Au -Ag -Gd三元系部分相图的 70 0℃部分等温截面。该截面上有 6个单相区 :(Ag ,Au) ,Ag51 Gd1 4 ,Ag2 Gd ,Au2 Gd ,Gd1 4 Au51和GdAu6;9个两相区 :Ag51 Gd1 4 + (Ag ,Au) ,Ag51 Gd1 4 +Ag2 Gd ,Ag2 Gd +Gd1 4 Au51 ,(Ag ,Au) +Au2 Gd ,Ag2 Gd +Au2 Gd ,(Ag ,Au) +Gd1 4 Au51 ,Ag51 Gd1 4 +Au2 Gd ,Gd1 4 Au51 +GdAu6和 (Ag ,Au) +GdAu6;4个三相区 :(Ag ,Au) +Gd1 4 Au51 +Au2 Gd ,Ag51 Gd1 4 + (Ag ,Au) +Au2 Gd ,Ag51Gd1 4 +Ag2 Gd +Au2 Gd和 (Ag ,Au) +GdAu6+Gd1 4 Au51 .在该成份区域未发现新的三元化合物。

The 700℃ isothermal section of the Au-Ag-Gd(Gd≤33 3%)ternary system phase diagram was determined by X-ray diffraction analysis DTA and optical microscopy.The section consists of six single-phase regions:(Ag,Au),Ag 51 Gd 14 ,Ag 2Gd,Au 2Gd,Gd 14 Au 51 and GdAu 6;nine two-phase regions:Ag 51 Gd 14 +(Ag,Au),Ag 51 Gd 14 +Ag 2Gd,Ag 2 Gd+Gd 14 Au 51 ,(Ag,Au)+Au 2Gd,Ag 2Gd+Au 2Gd,(Ag,Au)+Gd 14 Au 51 ,Ag 51 Gd 14 +Au 2Gd,Gd 14 Au 51 +GdAu 6 and (Ag,Au)+GdAu 6;four three-phase regions:(Ag,Au)+Gd 14 Au 51 +Au 2Gd,Ag 51 Gd 14 +(Ag,Au)+Au 2Gd,Ag 51 Gd 14 +Ag 2Gd+Au 2Gd and(Ag,Au)+GdAu 6+Gd 14 Au 51 .No new ternary intermetallic phase was found.