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Thermodynamic Description of the Al-Mo and Al-Fe-Mo Systems

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Abstract

The Al-Mo and Al-Fe-Mo systems were critically assessed using the CALPHAD technique. The solution phases (liquid, fcc and bcc) were described by a substitutional solution model. The non-stoichiometric compound AlMo3 was described by a two-sublattice model (Al,Mo)(Al,Mo)3 in the Al-Mo binary system and (Al,Fe,Mo)(Al,Fe,Mo)3 in the Al-Fe-Mo ternary system. Other compounds Al63Mo37, Al8Mo3, Al3Mo, Al4Mo, Al17Mo4, Al22Mo5, Al12Mo and Al5Mo in the Al-Mo system were treated as stoichiometric compounds in the binary system and as line compounds Al m (Fe,Mo) n in the Al-Fe-Mo ternary system. The compounds μ and Fe2Mo in the Fe-Mo system were treated as (Al,Fe)7Fe2(Fe,Mo)4 and (Fe,Mo)2(Al,Mo) in the Al-Fe-Mo system, respectively. Compounds Al5Fe4, Al2Fe, Al5Fe2 and Al13Fe4 in the Al-Fe system were treated as (Al,Fe,Mo), Al2(Fe,Mo), (Al,Fe)5(Al,Fe,Mo)2 and (Fe,Mo)0.235Al0.6275(Al,Va)0.1375 in the Al-Fe-Mo system, respectively. Ternary compounds τ1 and τ2 were treated as Al8(Al,Fe)Mo3 and (Al,Fe,Mo)(Va)3, respectively. A set of self-consistent thermodynamic parameters of the Al-Fe-Mo system was obtained.

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Acknowledgment

This work was supported by National Natural Science Foundation of China (NSFC) (grant nos. 50771016, 50731002).

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  1. Department of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China

    Zhenmin Du, Cuiping Guo, Changrong Li & Weijing Zhang

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  1. Zhenmin Du
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Correspondence to Zhenmin Du.

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Dedicated to Professor Dr. Zhanpeng Jin on the occasion of his 70th birthday.

This article is an invited paper selected from participants of the 14th National Conference and Multilateral Symposium on Phase Diagrams and Materials Design in honor of Prof. Zhanpeng Jin’s 70th birthday, held November 3-5, 2008, in Changsha, China. The conference was organized by the Phase Diagrams Committee of the Chinese Physical Society with Drs. Huashan Liu and Libin Liu as the key organizers. Publication in Journal of Phase Equilibria and Diffusion was organized by J.-C. Zhao, The Ohio State University; Yong Du, Central South University; and Qing Chen, Thermo-Calc Software AB.

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Du, Z., Guo, C., Li, C. et al. Thermodynamic Description of the Al-Mo and Al-Fe-Mo Systems. J. Phase Equilib. Diffus. 30, 487–501 (2009). https://doi.org/10.1007/s11669-009-9564-4

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