Thermodynamic modeling of B-Mo-Nb ternary system with modified B-Nb description

被引：1
|
作者：
Pan, Yafei [1 ,2 ,3 ]
Yang, Xiaolong [1 ]
Fan, Zhenyao [1 ]
Liu, Aijun [1 ]
Zhang, Jiuxing [1 ]
Luo, Fenghua [4 ]
Du, Yong [4 ]
Huang, Lei [1 ]
机构：
[1] Hefei Univ Technol, Sch Mat Sci & Engn, Hefei 230009, Anhui, Peoples R China
[2] Hefei Univ Technol, Minist Educ, Engn Res Ctr High Performance Copper Alloy Mat & P, Hefei 230009, Anhui, Peoples R China
[3] Monte Bianco Diamond Applicat Co Ltd, Foshan 528313, Guangdong, Peoples R China
[4] Cent South Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China
来源：
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY | 2023年 / 82卷
基金：
中国国家自然科学基金;
关键词：
B-Mo-Nb; Borides; Phase diagram; Thermodynamics; TRANSITION-METAL BORIDES; THERMO-CALC; TI SYSTEM; ALLOYS; RANGE;
D O I：
10.1016/j.calphad.2023.102602
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Based on a critical evaluation of the literature data, the B-Mo-Nb ternary system has been assessed by means of the CALPHAD (CALculation of PHAse Diagrams) technique. There is no ternary compound reported in this system. According to their crystal structures, the substitutional solution is adopted to model the ternary liquid, and the sublattice models are used to describe the Mo2B, & alpha;MoB, (Mo,Nb)B, (Mo,Nb)B2, Mo2B5, MoB4, Nb3B2, Nb5B6, Nb3B4, Nb2B3, (Mo,Nb) and (B) phases. The modeling covers the whole composition and temperature ranges. Due to the same crystal structure, the sublattice model of the NbB phase in the B-Nb binary system is adjusted as (Me,Va)0.5(B,Va)0.5, in order to be consistent with the & beta;MoB phase in the B-Mo binary system. The obtained thermodynamic parameters of the B-Mo-Nb system are demonstrated to be self-consistent and reasonable by adequately comparing the calculated and reported thermodynamic information and phase diagram. Based on the present thermodynamic parameters, the liquidus projection and reaction scheme of B-Mo-Nb system are presented.
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页数：10
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