The microstructural evolution and enhanced mechanical properties of in-situ (AlN+CrC) reinforced Al0.5CoCrFeNi high-entropy alloy composites

IF 3.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Vacuum Pub Date : 2025-02-19 DOI:10.1016/j.vacuum.2025.114143

Ji-dong Zhang, Lan Zhang, Hui-zhong Ma, Na Li

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引用次数: 0

Abstract

Using g-C₃N₄ as a precursor, the in situ synthesis of (AlN + CrC)-reinforced Al_0.5CoCrFeNi high-entropy alloy (HEA) was successfully achieved through the spark plasma sintering process. The nitrogen and carbon sources from g-C₃N₄ react with Al and Cr to form AlN and CrC, respectively, resulting in a (AlN + CrC)/Al_0.5CoCrFeNi composite with a network structure. The introduction of reinforcement particles significantly refines the grains of the composite. The meticulously designed (AlN + CrC)/Al_0.5CoCrFeNi composite exhibits a hardness of 589 HV and a tensile strength of 1108 MPa. Compared with high entropy alloy, the increases are 33 % and 28 %, respectively. The fracture mechanism of high-entropy alloys primarily involves ductile fracture, while the composite exhibits both ductile and brittle fracture mechanisms. The in-depth analysis of the reinforcement mechanism of network-structured composite materials reveals that Strengthening mechanism main include load transfer, thermal mismatch, solid solution strengthening, the orowan mechanism and synergistic enhancement of different types of particles at multiple scales.

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来源期刊

Vacuum 工程技术-材料科学：综合

CiteScore

6.80

自引率

17.50%

发文量

审稿时长

34 days

期刊介绍： Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences. A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below. The scope of the journal includes: 1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes). 2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis. 3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification. 4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.