کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1329997 1500117 2013 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The system Ta–V–Si: Thermodynamic modeling
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
The system Ta–V–Si: Thermodynamic modeling
چکیده انگلیسی

Based on previously evaluated experimental data for two isothermal sections of the Ta–V–Si system at 1500 °C and 1200 °C, thermodynamic modeling of the ternary system has been performed. Ground state phase stabilities i.e., the energies of formation are reported for all nine binary compounds and for the τ1 ternary intermetallic using an ab initio density functional approach. The calculated energies of formation are in agreement with available experimental data and they were included in the thermodynamic modeling, which was performed within the CALPHAD approach using the Thermo-Calc software package and taking into account data from existing thermodynamic assessments of the binary sub-systems. The comparison of experimental with calculated data demanded a thermodynamic remodeling of the sub-systems Ta–V and V–Si. The resulting thermodynamic optimization yielded good agreement with the experimental results in the investigated temperature region.

Calculated phase diagram of the Ta–V–Si system at 1500 °C.Figure optionsDownload as PowerPoint slideHighlights
► Thermodynamic modeling of the Ta–V–Si system has been performed.
► Ground state phase stabilities of compounds using an ab initio approach are reported.
► The calculated energies of formation were included in the thermodynamic modeling.
► Thermodynamic optimization required thermodynamic remodeling of Ta–V and V–Si system.
► Good agreement of experimental results with thermodynamic calculations was received.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Solid State Chemistry - Volume 199, March 2013, Pages 171–180
نویسندگان
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