(昆明贵金属研究所， 昆明 650221)
摘 要: 在Ag-Pd-Gd，Ag-Pd-Ru，Ag-Ru-Gd和Pd-Ru-Gd三元系合金相图的基础上，采用X射线衍射，差热分析、扫描电镜和显微金相分析等方法研究了Ag-Pd-Ru-Gd(x(Ru)=5%，x(Gd)<25%)四元系相图的700℃等温截面。结果表明：该截面上包含有2个单相区，即Pd(Ag)和Pd3Gd； 4个两相区，即Pd(Ag)+(Ru)，Pd(Ag)+Pd3Gd，(Ru)+Ag51Gd14，(Ru)+Pd 3Gd；3个三相区，即Pd(Ag)+Pd3Gd+(Ru)，Pd(Ag)+Ag51Gd14+(Ru)，Pd3Gd+Ag51Gd14+(Ru)；1个四相区，即Pd(Ag)+Pd3Gd+Ag51Gd14+(Ru)。未发现新的四元中间相。
关键字: 银；钯；钌；钆；Ag-Pd-Ru-Gd四元系；相图
quaternary system phase diagram
（Institute of Precious Metals， Kunming 650221，China）
Abstract:On the basis of Ag-Pd-Gd，Ag-Pd-Ru，Ag-Ru-Gd and Pd-Ru-Gd ternary phase diagrams, the 700℃ isothermal section of Ag-Pd-Ru-Gd(x(Ru)=5%，x(Gd)<25%) was studied by X-ray diffraction analysis，differential thermal analysis，SEM and optical microscopy. The results show that the isothermal section consists of two single-phase regions: Pd(Ag) and Pd3Gd, four binary-phase regions: Pd(Ag)+(Ru)， Pd(Ag)+Pd3Gd， (Ru)+Ag51Gd14 and (Ru)+Pd3Gd, three ternary-phase regions: Pd(Ag)+Pd3Gd+(Ru)，Pd(Ag)+Ag51Gd14+(Ru) and Pd3Gd+Ag51Gd14+(Ru), one quarternary-phase region: Pd(Ag)+Pd3Gd+Ag51Gd14+(Ru). No new quaternary intermetallic phase is found.
Key words: silver; palladium; ruthenium; gadolinium; Ag- Pd-Ru-Gd quaternary system; phase diagram
