Fe-Co-W相图的实验研究与热力学再评价

IF 1.9 3区材料科学 Q4 CHEMISTRY, PHYSICAL

Calphad-computer Coupling of Phase Diagrams and Thermochemistry Pub Date : 2025-07-18 DOI:10.1016/j.calphad.2025.102856

C.B. Li, Z.Q. Wang, L.D. Ye, J.F. Wu, K.G. Wang, L.B. Liu, L.G. Zhang

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引用次数: 0

摘要

本文采用平衡合金法测定了Fe-Co-W体系在1273 K和1073 K时的等温截面。确定了μ-(Fe,Co)7W6、λ-Fe2W和Co3W化合物在Fe-Co- w三元体系中的溶解度范围。未发现新的三元化合物。在现有实验数据的基础上，对Fe-Co-W三元体系及相关二元体系进行了热力学优化。采用(A)4(A，B)2(A，B)1(A，B)6晶格模型描述μ-(Co,Fe)7W6化合物，并重新评估了Co- w二元体系的热力学数据库。建立了新的Fe-Co-W体系热力学数据库，与实验数据具有较高的一致性。

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Experimental investigation and thermodynamic re-assessment of the Fe-Co-W phase diagram

This work determined the isothermal sections of the Fe-Co-W system at 1273 K and 1073 K using the equilibrated alloy method. The solubility ranges of the μ-(Fe,Co)₇W₆, λ-Fe₂W, and Co₃W compounds in the Fe-Co-W ternary system were identified. No new ternary compounds were observed. Based on existing experimental data, a thermodynamic optimization of the Fe-Co-W ternary system and related binary systems was conducted. The (A)₄(A,B)₂(A,B)₁(A,B)₆ lattice model was employed to describe the μ-(Co,Fe)₇W₆ compound, and the thermodynamic database of the Co-W binary system was re-assessed. A new thermodynamic database for the Fe-Co-W system was established, demonstrating high consistency with the experimental data.

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来源期刊

Calphad-computer Coupling of Phase Diagrams and Thermochemistry 化学-热力学

CiteScore

4.00

自引率

16.70%

发文量

审稿时长

2.5 months

期刊介绍： The design of industrial processes requires reliable thermodynamic data. CALPHAD (Computer Coupling of Phase Diagrams and Thermochemistry) aims to promote computational thermodynamics through development of models to represent thermodynamic properties for various phases which permit prediction of properties of multicomponent systems from those of binary and ternary subsystems, critical assessment of data and their incorporation into self-consistent databases, development of software to optimize and derive thermodynamic parameters and the development and use of databanks for calculations to improve understanding of various industrial and technological processes. This work is disseminated through the CALPHAD journal and its annual conference.