Phase Equilibria on Fe-Cu Based Alloys Used for Electrically Conductive Materials

导电材料用铁铜基合金的相平衡

• 批准号: 07650864
• 负责人: NAGASAKA Tetsuya
• 金额: $ 1.6万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07650864/
• 关键词: Phase diagram; Fe-Cu alloy; Thermodynamic assessment; Fe-Cu-Si alloy; Fe-Cu-P alloy; Electrically conductive material; Phase equilibria; Thermodynamics

It is known that many Fe-Cu based alloys have wide miscibility gap in liquid phase, and by utilizing such phase separation some Fe-Cu based alloys are used as an electrically conductive and a soft-magnetic materials in which fine Cu-rich phase precipitates on iron matrix. Fe-Cu-Si and Fe-Cu-P are typical examples of such alloy systems. Fe-Cu-Si and Fe-Cu-P ternaries are also basic alloy systems formed in the remelting process of incinerated ash which is recently being developed. Moreover, it is important to understand thermodynamic properties of Fe-Cu system to remove copper from remelted steel scrap. In spite of such importance, phase diagrams of Fe-Cu based ternary alloys are not well established. The objective of the present work is to establish phase diagrams and thermodynamic properties of Fe-Cu-Si and Fe-Cu-P ternary alloys. In 1995, solubility of FeSi compound, solid Si in liquid phase and tie lines between two immiscible liquid phases in Fe-Cu-Si system have been measured in the temperature range from 1250ﾟC to 1550ﾟC.As the results, observed phase equilibria differed from the literature phase diagram proposed by Chang et al. In 1996, tie lines between solid iron and copper-rich melt in Fe-Cu-P system were determined at 1250ﾟC by solid-liquid diffusion couple technique. Measured phase equilibria of Fe-Cu-P system also differed from the literature phase diagram. Phase diagrams of Fe-Cu-Si and Fe-Cu-P systems were thermodynamically assessed based on the sub-regular solution model.

众所周知，许多基于Fe-Cu的合金在液相中具有较大的可丧失性差距，并且通过利用这种相分离，一些基于Fe-Cu的合金用作电子导电和软磁性材料，在该材料中，在铁基质上富含Cu富集的相位。 Fe-Cu-Si和Fe-Cu-P是此类合金系统的典型例子。 Fe-Cu-Si和Fe-Cu-P Ternaries也是在最近正在开发的焚化灰分过程中形成的基本合金系统。此外，重要的是要了解Fe-Cu系统的热力学特性，以从记忆的钢废料中去除铜。尽管很重要，但基于Fe-Cu的三元合金的相图仍未得到很好的确定。当前工作的目的是建立Fe-Cu-Si和Fe-Cu-P型合金的相图和热力学特性。在1995年，在FE-CU-SI系统中两个不混溶的液相之间的FESI化合物，固体Si的固体Si和扎带线在温度范围内测量了1250°C至1550 ﾟC。结果，结果与Chang等人提出的文献图相等的相等相等。在1996年，通过固液扩散夫妇技术在1250°C下在1250 cu-P系统中固体铁和富含铜的熔体之间的扎带线。测得的相当相当的Fe-Cu-P系统的相位也与文献相图不同。 Fe-CU-SI和Fe-Cu-P系统的相图根据亚规范溶液模型进行热力学评估。

项目成果

長坂徹也: "Fe-Cu-P系合金の相平衡" 材料とプロセス. 8. 1025 (1995)

Tetsuya Nagasaka：“Fe-Cu-P 合金的相平衡”材料和工艺。8. 1025 (1995)。

M.Hino: "Activity of Phosphorus in alpha-Fe and Phase Diagram of Fe-P Binary System Above 1273K" Zeitschurift fur Metallkunde 88. (in press). (1997)

M.Hino：“α-Fe 中磷的活性和 1273K 以上 Fe-P 二元系统的相图”Zeitschurift Fur Metallkunde 88。（印刷中）。

長坂徹也: "Fe-Cu-P系合金の相平衡" 材料とプロセス. 8. 1025-1025 (1995)

Tetsuya Nagasaka：“Fe-Cu-P 合金的相平衡”材料和工艺 8. 1025-1025 (1995)。

T.Nagasaka: "Fundamental Studies on the Removal of Cu, Sn and Zn from Remelted Steel Scrap" Steelmaking Conference Proceedings. 79. 589-597 (1996)

T.Nagasaka：“从重熔废钢中去除铜、锡和锌的基础研究”炼钢会议论文集。

M.Hino: "Fundamental Studies on Separation of Residual Elements from Steel Scrap" The Iron and Steel Institute of Japan. 307. (1996)

M.Hino：“从废钢中分离残余元素的基础研究”日本钢铁研究所。