(昆明贵金属研究所，昆明650221)
摘 要: 采用X射线衍射、电子探针和金相显微镜等方法研究了Ag-Pd-Ru三元系相图的700 ℃等温截面。发现在该截面上沿着Ag-Pd侧有一单相区(Ag或Pd)，这个单相区在富Pd区域较宽；在该截面的富Ru侧也存在一较小的单相区(Ru)；在这两个单相区之间是一个宽阔的二相区(Ag＋Ru)。此外，在Ag-Pd-Ru三元系富Ag-Ru侧的部分成分区域，由于合金在液态出现分层现象，凝固后难于获得均匀合金，致使该区域内的相区边界未能测定。
关键字: 银；钯；钌；Ag-Pd-Ru三元系；相图
（Institute of Precious Metals, Kunming 650221, P.R.China）
Abstract:The 700 ℃ isothermal section of the Ag-Pd-Ru ternary system phase diagram was determined by X-ray diffraction analysis, electron probe analysis and optical microscopy. It was found that on this section there are a single-phase region (Ag or Pd) along Ag-Pd side, the wider part of which is at Pd-rich side, a small area single-phase region (Ru) at Ru-rich side and a wide two-phase region (Ag+Ru) between two single-phase regions. Because the liquid alloys in local Ag-Ru-rich range of the Ag-Pd-Ru ternary system exhibit immiscibility and are difficult to be homogenized after solidifying, the boundary of the two-phase region (Ag+Ru) is unable to be determined yet.
Key words: silver; palladium; ruthenium; Ag-Pd-Ru ternary systems; phase diagrams
