关于高熵 (Hf0.2Zr0.2Ti0.2W0.2Mo0.2)B2 陶瓷的合成和三力学性能的新见解

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL Tribology International Pub Date : 2024-10-13 DOI:10.1016/j.triboint.2024.110321

Tabrez Qureshi, Mohammad Mohsin Khan, Harveer Singh Pali

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引用次数: 0

摘要

采用两步火花等离子烧结工艺合成了高熵 (Hf0.2Zr0.2Ti0.2W0.2Mo0.2)B2 陶瓷，先在 1600 °C 下致密，然后在 1850 °C 下烧结。这种方法生产出的致密材料具有优异的机械和摩擦学特性。硬度值从 18.85 GPa 到 39.65 GPa 不等，最大杨氏模量为 319 GPa。微划痕测试表明，这种材料具有很强的抗塑性变形能力，表面损伤极小，在机械应力作用下具有很强的耐久性。在 15 N 和 20 N 负载下进行的摩擦学测试表明，该材料具有优异的耐磨性，这归功于坚硬的主相和润滑的软次相。这些研究结果证实了该材料的坚固性，并显示了两步合成法在优化微观结构和提高性能方面的有效性，使其适用于高应力和磨损密集型应用。

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Novel insights into the synthesis and tribo-mechanical performance of high-entropy (Hf0.2Zr0.2Ti0.2W0.2Mo0.2)B2 ceramics

High-entropy (Hf_0.2Zr_0.2Ti_0.2W_0.2Mo_0.2)B₂ ceramics were synthesized using a two-step spark plasma sintering process, with densification at 1600 °C followed by sintering at 1850 °C. This method produced dense materials with excellent mechanical and tribological properties. Hardness values ranged from 18.85 GPa to 39.65 GPa, with a maximum Young’s modulus of 319 GPa. Micro-scratch tests showed high resistance to plastic deformation and minimal surface damage, highlighting durability under mechanical stress. Tribological tests at 15 N and 20 N loads demonstrated exceptional wear resistance, attributed to hard primary phases and lubricating soft secondary phases. These findings confirm the material’s robustness and show the effectiveness of the two-step synthesis in optimizing microstructure and enhancing properties, making it suitable for high-stress and wear-intensive applications.

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来源期刊

Tribology International 工程技术-工程：机械

CiteScore

10.10

自引率

16.10%

发文量

627

审稿时长

35 days

期刊介绍： Tribology is the science of rubbing surfaces and contributes to every facet of our everyday life, from live cell friction to engine lubrication and seismology. As such tribology is truly multidisciplinary and this extraordinary breadth of scientific interest is reflected in the scope of Tribology International. Tribology International seeks to publish original research papers of the highest scientific quality to provide an archival resource for scientists from all backgrounds. Written contributions are invited reporting experimental and modelling studies both in established areas of tribology and emerging fields. Scientific topics include the physics or chemistry of tribo-surfaces, bio-tribology, surface engineering and materials, contact mechanics, nano-tribology, lubricants and hydrodynamic lubrication.