Effect of YSZ Particle Size and Content on Microstructure, Mechanical and Tribological Properties of (CoCrFeNiAl)1−x(YSZ)x High Entropy Alloy Composites

IF 3.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Metals and Materials International Pub Date : 2024-03-29 DOI:10.1007/s12540-024-01656-2

M. Ghanbariha, M. Farvizi, S. A. Ataie, A. Alizadeh Samiyan, T. Liskiewicz, H. S. Kim

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Abstract

High entropy alloy composites (HEACs) have recently been explored for use in industrial applications. This study investigates the impact of particle size (micro or nano) and content (5 and 10 wt%) of YSZ on the microstructure and tribological properties of AlCoCrFeNi. The samples were prepared using a combination of mechanical alloying and spark plasma sintering. XRD results and Rietveld analysis reveal that HEACs with micro-sized YSZ have a higher BCC/FCC ratio. FESEM and EDS results confirmed the evolution of Al-rich regions in the vicinity of the reinforcements. Especially, in HEA-10NanoYSZ-sample, due to higher interfacial regions, a huge amount of Al-rich phase has been formed which yields the reduction of BCC phase content in this sample. Microhardness and pin-on-disc wear tests show that the samples reinforced with microparticles demonstrate better performance compared to nanocomposite samples. For example, HEA-10MicroYSZ-sample exhibits the highest hardness (5.1 GPa) and the lowest wear characteristics (with a coefficient of friction of 0.8 and a wear rate of 4 × 10⁻⁴ mm³/N.m). This can be correlated to the higher hardness and BCC phase content, and grain boundary strengthening in the microcomposites.

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YSZ 粒径和含量对 (CoCrFeNiAl)1-x(YSZ)x 高熵合金复合材料显微结构、力学和摩擦学性能的影响

高熵合金复合材料（HEACs）最近已被探索用于工业应用。本研究探讨了 YSZ 的粒度（微米或纳米）和含量（5 和 10 wt%）对 AlCoCrFeNi 的微观结构和摩擦学特性的影响。样品的制备采用了机械合金化和火花等离子烧结相结合的方法。XRD 结果和 Rietveld 分析表明，含有微量 YSZ 的 HEAC 具有更高的 BCC/FCC 比。FESEM 和 EDS 结果证实了增强材料附近富铝区域的演变。特别是在 HEA-10NanoYSZ 样品中，由于界面区域较高，形成了大量富铝相，从而降低了该样品中 BCC 相的含量。显微硬度和针盘磨损测试表明，与纳米复合材料样品相比，使用微颗粒增强的样品具有更好的性能。例如，HEA-10MicroYSZ 样品具有最高的硬度（5.1 GPa）和最低的磨损特性（摩擦系数为 0.8，磨损率为 4 × 10-4 mm3/N.m）。这与微复合材料较高的硬度和 BCC 相含量以及晶界强化有关。

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来源期刊

Metals and Materials International 工程技术-材料科学：综合

CiteScore

7.10

自引率

8.60%

发文量

197

审稿时长

3.7 months

期刊介绍： Metals and Materials International publishes original papers and occasional critical reviews on all aspects of research and technology in materials engineering: physical metallurgy, materials science, and processing of metals and other materials. Emphasis is placed on those aspects of the science of materials that are concerned with the relationships among the processing, structure and properties (mechanical, chemical, electrical, electrochemical, magnetic and optical) of materials. Aspects of processing include the melting, casting, and fabrication with the thermodynamics, kinetics and modeling.