Development of oxide melt solution calorimetry for transition metal diborides

IF 1.9 3区材料科学 Q4 CHEMISTRY, PHYSICAL

Calphad-computer Coupling of Phase Diagrams and Thermochemistry Pub Date : 2025-08-27 DOI:10.1016/j.calphad.2025.102867

Stuart C. Ness , Tucker Moore , Steve Kilczewski , Kristopher Behler , Matthew Dunstan , Scott J. McCormack

引用次数: 0

Abstract

Oxide-Melt Solution Calorimetry (OMSC) has been used to investigate standard enthalpies of formation in transition metal diborides, a first for the technique. Formation enthalpies for the Group IV and Group V transition metal diborides have been measured (TiB₂: Δ_fH^⦵ = −280 ± 11 kJ/mol, ZrB₂: Δ_fH^⦵ = −328 ± 10 kJ/mol, NbB₂: Δ_fH^⦵ = −245 ± 12 kJ/mol, HfB₂: Δ_fH^⦵ = −336 ± 11 kJ/mol, TaB₂: Δ_fH^⦵ = −195 ± 25 kJ/mol) and compared with good agreement to literature values. Multiple thermochemical pathway confirmations are reported. This data is required for the development of robust diboride phase diagrams for ultra-high temperature applications.

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过渡金属二硼化物氧化物熔体溶液量热法的研究进展

氧化物-熔体溶液量热法（OMSC）已被用于研究过渡金属二硼化物的标准生成焓，这是该技术的首次应用。测量了IV族和V族过渡金属二硼化物的生成焓（TiB2： ΔfH⦵=−280±11 kJ/mol, ZrB2： ΔfH⦵=−328±10 kJ/mol, NbB2： ΔfH⦵=−245±12 kJ/mol, HfB2： ΔfH⦵=−336±11 kJ/mol, TaB2： ΔfH⦵=−195±25 kJ/mol），并与文献值进行了比较。多个热化学途径的证实被报道。这些数据是开发用于超高温应用的稳健二硼化物相图所必需的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.