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首页> 外文期刊>Journal of Phase Equilibria and Diffusion >Experimental Investigation and Thermodynamic Modeling of the Phase Equilibria in the Cu-Nb-Ni Ternary System
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Experimental Investigation and Thermodynamic Modeling of the Phase Equilibria in the Cu-Nb-Ni Ternary System

机译：CU-NB-NI三元系统中相平衡的实验研究和热力学建模

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摘要

The phase equilibria of the Cu-Nb-Ni system were investigated via a combination of key equilibrated alloys and thermodynamic modeling. Twelve different compositions of ternary alloys were prepared to determine the isothermal sections at 700, 800 and 900 degrees C, by means of x-ray diffraction and scanning electron microscopy with energy dispersive x-ray spectroscopy. The three- and two-phase regions were determined. The solubilities of the NbNi3 and Nb7Ni6 phases were measured. No ternary compound was found in this ternary system. Based on the experimental equilibria data from the literature and the present work, a thermodynamic description of the Cu-Nb-Ni system was carried out by using the CALPHAD (CALculation of PHAse Diagrams) method. The substitutional model and sublattice model were employed to describe the solution phases and intermediate phases, respectively. A set of self-consistent thermodynamic parameters of the Cu-Nb-Ni system was conclusively obtained. Most of the reliable experimental data were reproduced by the present thermodynamic modeling.
机译：采用关键平衡合金和热力学模型相结合的方法研究了Cu-Nb-Ni体系的相平衡。制备了12种不同成分的三元合金，通过x射线衍射和扫描电子显微镜以及能量色散x射线光谱测定了700、800和900℃下的等温截面。确定了三相区和两相区。测量了NbNi3和Nb7Ni6相的溶解度。在该三元体系中未发现三元化合物。基于文献和现有工作中的实验平衡数据，采用CALPHAD（相图计算）方法对Cu-Nb-Ni体系进行了热力学描述。用置换模型和亚晶格模型分别描述溶液相和中间相。最终得到了Cu-Nb-Ni体系的一组自洽热力学参数。大多数可靠的实验数据都是通过目前的热力学模型重现的。

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