銅-銀-セレン系平衡状態図と少量の銀とセレンとを含有する金属銅相の組織について
1971 年 87 巻 1000 号 p. 485-490
詳細
1971 年 87 巻 1000 号 p. 485-490
The immiscibility gap in the system copper-silver-selenium at 1, 200°C was determined, and a new equilibrium diagram of this system between 600° and 1, 200°C was proposed. Moreover, the form of occurrence of silver and selenium in blister copper was studied. The results obtained are as follows.
(1) The distribution ratio of silver between liquid metallic phase and selenide phase is about 1.6 at very low silver content and increases to about 2.5 with increasing silver content.
(2) There are two reactions in the equilibrium system copper-silver-silver selenide-cuprous selenide.
L2>(N) =L2>(N) +Ag+α at 882°C
L=(Cu)+(Ag)+α at 770°C
(3) It is confirmed that cuprous selenide and silver are the phases of the most importance in blister copper containing a small amount of silver and selenium, and silver selenide is extremely unlikely to appear to an appreciable extent.
