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物理学报. 1982, 31(6): 807-809.
doi: 10.7498/aps.31.807.
Dy-Cu二元系合金相图
- 收稿日期: 1981-05-12
- 修回日期: 1981-10-28
- 刊出日期: 1982-03-05
摘要: Dy-Cu二元系合金相图已采用X射线衍射和差热分析方法测出。此系统中存在两个共晶反应,共晶点成份分别为12wt%Cu和83Wt%Cu,对应的共晶温度为808℃和880℃。在室温下存在三个稳定的金属间化合物:DyCu,DyCu2和DyCu5,DyCu和DyCu2分别在840℃和885℃由包晶反应生成,而DyCu5在970℃液固同成份熔化。在890℃由包晶反应形成的金属间化合物DyCu7在缓冷至848
English Abstract
A PHASE DIAGRAM OF THE ALLOYS OF THE DYSPROSIUM-COPPER BINARY SYSTEM
- Received Date:
12 May 1981
- Accepted Date:
28 October 1981
- Published Online:
05 March 1982
Abstract: A phasediagram of the alloys of the dysprosium-copper binary system has been determined by means of X-ray diffraction and differential thermal analysis techniques. Its constitutional diagram has been constructed. Two eutectic reactions occur at 12 and 83 wt%Cu approximately, and with characteristic temperatures of 808 and 88°C, respectively. At room temperature three stable intermetallic compounds have been found, namely DyCu, DyCu2 and DyCu5. The DyCu and DyCu2 are formed by peritectic reactions at 840 and 885°C respectively, and DyCu5 melt congruently at 97°C. However, another intermetallic compound DyCur forms at 89°C periteetically and decomposes eutectoidally at 848°C as it is cooling slowly. The solid solubility of Dy in Cu is undetectable, and the solid solubility of Cu in Dy is less than 0.2 wt%Cu at room temperature.
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