(昆明貴金屬研究所， 昆明 650221)
摘 要: 在Ag-Pd-Gd，Ag-Pd-Ru，Ag-Ru-Gd和Pd-Ru-Gd三元系合金相圖的基礎(chǔ)上，采用X射線(xiàn)衍射，差熱分析、掃描電鏡和顯微金相分析等方法研究了Ag-Pd-Ru-Gd(x(Ru)=5%，x(Gd)<25%)四元系相圖的700℃等溫截面。結(jié)果表明：該截面上包含有2個(gè)單相區(qū)，即Pd(Ag)和Pd3Gd； 4個(gè)兩相區(qū)，即Pd(Ag)+(Ru)，Pd(Ag)+Pd3Gd，(Ru)+Ag51Gd14，(Ru)+Pd 3Gd；3個(gè)三相區(qū)，即Pd(Ag)+Pd3Gd+(Ru)，Pd(Ag)+Ag51Gd14+(Ru)，Pd3Gd+Ag51Gd14+(Ru)；1個(gè)四相區(qū)，即Pd(Ag)+Pd3Gd+Ag51Gd14+(Ru)。未發(fā)現(xiàn)新的四元中間相。
關(guān)鍵字: 銀；鈀；釕；釓；Ag-Pd-Ru-Gd四元系；相圖
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
