Oxidation sequence modulation induced superior high-temperature tribological performance of Ti-Hf-Nb-V refractory high entropy alloy fabricated through directed energy deposition

IF 9.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Rare Metals Pub Date : 2025-01-17 DOI:10.1007/s12598-024-03153-2

Yong-Yun Zhang, Cong-Rui Yang, Xing Tong, Jing Zhou, Lin Liu, Meng Xiao, Hai-Bo Ke, Kang-Cheung Chan, Wei-Hua Wang

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Abstract

To fulfill the demands of applications under severe operational conditions, alloys should possess outstanding wear resistance at elevated temperatures. A Ti-Hf-Nb-V based refractory high entropy alloy (RHEA) was successfully produced using the directed energy deposition (DED) technique, which avoided the formation of fatal defects and showcased well-performed mechanical properties across a broad temperature spectrum. Strategic design of the oxidation sequence enabled the early formation of oxide nanolayers, which can form a polycrystalline oxide nanocoating under a complex stress condition to drastically reduce the wear rate from 2.69 × 10^–4 mm³·(N·m)⁻¹ at room temperature to 6.90 × 10^–7 mm³·(N·m)⁻¹ at 600 °C. These results indicate that the application of additive manufacturing to fabricate RHEAs with superior wear resistance at high temperatures paves the way for the development of functional coatings designed to withstand extreme conditions.

Graphical Abstract

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氧化顺序调制诱导定向能沉积制备的Ti-Hf-Nb-V难熔高熵合金具有优异的高温摩擦学性能

为了满足苛刻操作条件下的应用要求，合金应具有优异的高温耐磨性。采用定向能沉积（DED）技术成功制备了Ti-Hf-Nb-V基难熔高熵合金（RHEA），避免了致命缺陷的形成，并在宽温度谱范围内表现出良好的力学性能。氧化顺序的策略设计使氧化纳米层的早期形成成为可能，在复杂应力条件下形成多晶氧化纳米涂层，使磨损率从室温下的2.69 × 10-4 mm3·（N·m）−1大幅降低到600℃下的6.90 × 10-7 mm3·（N·m）−1。这些结果表明，应用增材制造技术制造高温下具有优异耐磨性的RHEAs，为开发能够承受极端条件的功能涂层铺平了道路。图形抽象

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Rare Metals 工程技术-材料科学：综合

CiteScore

12.10

自引率

12.50%

发文量

2919

审稿时长

2.7 months

期刊介绍： Rare Metals is a monthly peer-reviewed journal published by the Nonferrous Metals Society of China. It serves as a platform for engineers and scientists to communicate and disseminate original research articles in the field of rare metals. The journal focuses on a wide range of topics including metallurgy, processing, and determination of rare metals. Additionally, it showcases the application of rare metals in advanced materials such as superconductors, semiconductors, composites, and ceramics.