新型高熵合金基自润滑复合材料Al0.5CrFeNiV0.5-hBN的组织、力学和摩擦学性能研究

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2025-04-14 DOI:10.1016/j.jallcom.2025.180402

Xiaotian Wu , Lihong Su , Anh Kiet Tieu , Jun Cheng , Cuong Nguyen , Hongtao Zhu , Jun Yang , Guanyu Deng

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引用次数: 0

摘要

以Al0.5CrFeNiV0.5 HEA为基体，六方氮化硼（hBN）为固体润滑剂，设计并制备了一种具有良好力学性能和摩擦学性能的新型高熵合金（HEA）自润滑复合材料。除了分散良好的hBN颗粒外，新型复合材料还由富（Al,Ni）相、富（Cr，V）相、富（Cr,Fe，V）相、CrVB4相和AlN相组成。高温纳米压痕试验表明，该复合材料具有优异的抗热软化性能，在较宽的温度范围内表现出良好的机械强度稳定性。此外，从室温到700°C，复合材料在减少摩擦和抗磨性能方面也有显着改善。hBN和hBN与Al0.5CrFeNiV0.5 HEA基体反应形成的新相增强了材料的力学性能和摩擦学性能。随着磨损测试温度的升高，Al0.5CrFeNiV0.5-hNB复合材料对Si3N4球的滑动磨损机制由磨损和塑性变形向氧化和黏着磨损转变。

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Study on microstructure, mechanical and tribological properties of a novel high-entropy alloy based self-lubricating composite Al0.5CrFeNiV0.5-hBN

A new high-entropy alloy (HEA) based self-lubricating composite with good mechanical and tribological properties has been designed and fabricated, using Al_0.5CrFeNiV_0.5 HEA as matrix and hexagonal boron nitride (hBN) as solid lubricant. In addition to the well dispersed hBN particles, the novel composite is consisted of (Al,Ni)-rich, (Cr,V)-rich, (Cr,Fe,V)-rich, CrVB₄, and AlN phases. High temperature nanoindentation tests of the composite revealed its excellent thermal softening resistance, showing very good mechanical strength stability in a wide temperature range. Additionally, the composite also exhibits substantial improvements in friction reduction and anti-wear performance from RT to 700 °C. The enhanced mechanical and tribological properties are attributed to the hBN and new phases formed by reactions between hBN and Al_0.5CrFeNiV_0.5 HEA matrix. The main wear mechanisms during sliding of the Al_0.5CrFeNiV_0.5-hNB composite against the Si₃N₄ balls shift from abrasion and plastic deformation to oxidation and adhesive wear as the wear testing temperature is increased.

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.