选择性激光熔化制备纳米tic增强feccrnimn高熵合金复合材料的摩擦学行为

IF 5.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics Pub Date : 2026-04-01 Epub Date: 2026-02-11 DOI:10.1016/j.intermet.2026.109203

Hamza Osman , Jie Pan , Lin Liu

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引用次数: 0

摘要

研究了选择性激光熔化法制备的纳米tic增强高熵合金复合材料（HEAC）的显微硬度和摩擦学性能。与纯HEA相比，HEAC具有更高的显微硬度和优异的摩擦学性能。显微硬度从236 HV提高到464 HV，摩擦系数（COF）和磨损率分别下降到0.589和0.38 × 10−5 mm3/N·m，分别下降了8.0%和41.5%。纯HEA的磨损机制主要是粘附和氧化，这是由于其硬度低，磨损表面有大量碎片的分层。随着纳米tic颗粒的加入，主要的磨损机制转变为磨粒和氧化磨损，并形成薄的氧化摩擦层。这种磨损性能的改善是由于在HEA基体中添加了纳米tic，一方面起到了润滑剂的作用，另一方面提高了HEAC的显微硬度。

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Tribological behavior of nano TiC-reinforced FeCoCrNiMn high entropy alloy composite fabricated by selective laser melting

In this study, the microhardness and tribological behavior of high entropy alloy composite (HEAC) reinforced with nano-TiC particles, fabricated using selective laser melting (SLM), were investigated. The HEAC exhibited higher microhardness and superior tribological properties compared to the pure HEA. The microhardness increased from 236 HV to 464 HV, while the friction coefficient (COF) and wear rate decreased to 0.589 and 0.38 × 10⁻⁵ mm³/N·m, representing reductions of 8.0% and 41.5%, respectively. The wear mechanism of the pure HEA was predominantly adhesive and oxidative, which was attributed to its low hardness and the delamination of large debris on the worn surface. With the addition of nano-TiC particles, the dominant wear mechanism changed to abrasive and oxidative, accompanied by the formation of a thin tribo-oxide layer. This improvement in wear properties is attributed to the addition of nano-TiC in the HEA matrix, which acts as a lubricant on one hand, and increases the microhardness of the HEAC on the other hand.

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来源期刊

Intermetallics 工程技术-材料科学：综合

CiteScore

7.80

自引率

9.10%

发文量

291

审稿时长

37 days

期刊介绍： This journal is a platform for publishing innovative research and overviews for advancing our understanding of the structure, property, and functionality of complex metallic alloys, including intermetallics, metallic glasses, and high entropy alloys. The journal reports the science and engineering of metallic materials in the following aspects: Theories and experiments which address the relationship between property and structure in all length scales. Physical modeling and numerical simulations which provide a comprehensive understanding of experimental observations. Stimulated methodologies to characterize the structure and chemistry of materials that correlate the properties. Technological applications resulting from the understanding of property-structure relationship in materials. Novel and cutting-edge results warranting rapid communication. The journal also publishes special issues on selected topics and overviews by invitation only.