(Hf0.2Zr0.2Ta0.2Ti0.2Me0.2)B2 (Me=Nb,Cr) 高熵陶瓷在 1200 °C 空气中的氧化行为

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2024-11-15 DOI:10.1016/j.jeurceramsoc.2024.117078

Yan Zhang , Bo-Yu Ni , Yan-Fu Chai , Wei-Ming Guo , Tian-Qi Zhang , Wei-Feng Yao , Hua-Tay Lin

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引用次数: 0

摘要

研究了(Hf0.2Zr0.2Ta0.2Nb0.2Ti0.2)B2和(Hf0.2Zr0.2Ta0.2Cr0.2Ti0.2)B2高熵硼化物陶瓷在1200 ℃下的氧化行为，以深入了解其微观结构演变和氧化机理。结果表明，(Hf0.2Zr0.2Ta0.2Nb0.2Ti0.2)B2 的氧化层厚度约为 112 μm，远高于(Hf0.2Zr0.2Ta0.2Cr0.2Ti0.2)B2 的氧化层厚度（62 μm）。这两种材料体系在氧化反应和抗氧化性方面的差异主要与氧化层的不同结构有关。对于（Hf0.2Zr0.2Ta0.2Nb0.2Ti0.2）B2 样品，氧化层由四层结构（多孔-致密-多孔-致密）组成。相反，(Hf0.2Zr0.2Ta0.2Cr0.2Ti0.2)B2 样品的氧化层则呈现出明显的层状结构。

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Oxidation behavior of (Hf0.2Zr0.2Ta0.2Ti0.2Me0.2)B2 (Me=Nb,Cr) high-entropy ceramics at 1200 °C in air

The oxidation behavior of (Hf_0.2Zr_0.2Ta_0.2Nb_0.2Ti_0.2)B₂ and (Hf_0.2Zr_0.2Ta_0.2Cr_0.2Ti_0.2)B₂ high entropy boride ceramics at 1200 °C was investigated to provide insights into their microstructural evolution and oxidation mechanism. The results showed that the oxide layer thickness of (Hf_0.2Zr_0.2Ta_0.2Nb_0.2Ti_0.2)B₂ was about 112 μm, much thicker than the counterpart of (Hf_0.2Zr_0.2Ta_0.2Cr_0.2Ti_0.2)B₂ (∼62 μm). The differences in oxidation response and oxidation resistance between these two material systems were mainly pertained to the generation of different structures of oxide layer. For the (Hf_0.2Zr_0.2Ta_0.2Nb_0.2Ti_0.2)B₂ sample, the oxide layer was composed of four-layer structure (porous-dense-porous-dense). In contrast, the oxide layers of (Hf_0.2Zr_0.2Ta_0.2Cr_0.2Ti_0.2)B₂ sample exhibited a distinctly laminated structure.

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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.