当前位置: X-MOL 学术Calphad › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Experimental investigation and thermodynamic modeling of the Mo–Co–B ternary system
Calphad ( IF 2.4 ) Pub Date : 2021-09-20 , DOI: 10.1016/j.calphad.2021.102354
Yangfan Liu 1 , Cong Zhang 1 , Bin Xu 1 , Guoqiang Yang 1 , Xue Jiang 1, 2 , Shuyan Zhang 3 , Yongwei Wang 1 , Ruijie Zhang 1 , Haiqing Yin 1, 2
Affiliation  

Among the ternary borides, the Mo–Co–B system is of great interest because of its excellent hardness, toughness, and stability performance. Eight samples with 60 at.% Co were designed to investigate the isothermal section of Mo–Co–B system at 1073 K in the Co-rich portion. Scanning electron microscopy, energy-dispersion spectroscopy, electron probe microanalysis, differential scanning calorimetry, and X-ray diffraction were used to investigate the phase equilibria of the samples. The formation enthalpies of the ternary borides were obtained by first-principles calculations to serve as key information for thermodynamic assessment. By coupling the reviewed experimental data from the literature, the presently determined phase equilibria, and the calculated formation enthalpies of the compounds, the thermodynamic parameters for the Mo–Co–B ternary system were optimized and used to calculate the isothermal sections, vertical section, and liquidus projection of the system. Comprehensive comparisons showed that the calculated results are in reasonable agreement with the reported phase diagram and thermodynamic data.



中文翻译:

Mo-Co-B三元体系的实验研究和热力学模拟

在三元硼化物中,Mo-Co-B 体系因其优异的硬度、韧性和稳定性而备受关注。设计了八个含 60 at.% Co 的样品来研究 Mo-Co-B 系统在 1073 K 下富钴部分的等温截面。使用扫描电子显微镜、能量色散光谱、电子探针微量分析、差示扫描量热法和 X 射线衍射来研究样品的相平衡。三元硼化物的形成焓是通过第一性原理计算获得的,作为热力学评估的关键信息。通过结合文献中审查的实验数据、目前确定的相平衡和计算的化合物形成焓,优化了 Mo-Co-B 三元系统的热力学参数,并用于计算系统的等温截面、垂直截面和液相线投影。综合比较表明,计算结果与报道的相图和热力学数据具有合理的一致性。

更新日期:2021-09-20
down
wechat
bug