双相（Hf,Ti,Zr）B2 - (Hf,Ti,Zr)C陶瓷的协同性能

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2025-04-11 DOI:10.1016/j.jeurceramsoc.2025.117448

S. Filipović , W.G. Fahrenholtz , G.E. Hilmas , N. Obradović , S. Curtarolo

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引用次数: 0

摘要

采用boro/碳热还原-火花等离子烧结法制备双相中熵碳化物/硼化物陶瓷。根据过渡金属在双相陶瓷中的分布，分别制备了中熵硼化物和碳化物陶瓷。在0.49 N的载荷下，双相陶瓷的硬度值为43.5 ± 5.1 GPa，而根据混合物的体积法则计算出的硬度值为36.2 GPa。优化后的双相陶瓷的导热系数比组成的单相高~ 15 %。双相陶瓷的电阻率也比单个成分计算的值低~ 35 %。对于双相陶瓷，声子对总电导率的贡献约为44. %，表明中熵硼化物相对双相陶瓷的电阻率有主导作用。

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Synergystic properties of dual phase (Hf,Ti,Zr)B2–(Hf,Ti,Zr)C ceramics

Dual phase mid entropy carbide/ boride ceramics were produced by boro/carbothermal reduction followed by spark plasma sintering. Based on the transition metal distribution in the dual phase ceramics, individual mid entropy boride and carbide ceramics were produced. The hardness value for the dual phase ceramic was 43.5 ± 5.1 GPa at a load of 0.49 N while value calculated using a volumetric rule of mixtures was 36.2 GPa based on measured hardness values of the constituents. Thermal conductivity of the optimized dual phase ceramic was ∼15 % higher than the constituent single phases. The dual phase ceramic also had an electrical resistivity that was ∼35 % lower than the value calculated from the individual constituents. For the dual phase ceramic, the phonon contribution was approximately 44 % of the total conductivity, indicating that the mid entropy boride phase had a dominant effect on the electrical resistivity of the dual phase ceramic.

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.