Microstructure and wear behavior of (CoCrFeNiMn)1-x/(WC)x composite coatings fabricated by directed energy deposition

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Wear Pub Date : 2025-06-10 DOI:10.1016/j.wear.2025.206205

Ziqian Zhang , Hejia Li , Chaorun Si , Shilin Xu , Junbiao Wang

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引用次数: 0

Abstract

In this study, (CoCrFeNiMn)_1-x/(WC)_x composite coatings with WC contents of 0, 20, 30, and 40 wt% were fabricated using directed energy deposition to enhance wear resistance and mechanical properties. The coatings exhibited excellent metallurgical bonding with the substrate and strong interfacial adhesion between WC particles and the HEA matrix, with no cracks observed. The incorporation of WC significantly increased the hardness of the coatings, with WC particles being harder than the HEA matrix and reinforcing the matrix's mechanical properties. Wear tests, using Si₃N₄ as the counterface material, demonstrated that wear resistance improved with increasing WC content, as evidenced by smoother wear tracks, reduced wear rates, and lower friction coefficients. The wear mechanism shifted from abrasive wear and oxidation in pure HEA to more stable wear behavior with WC reinforcement. These results suggest that WC-reinforced CoCrFeNiMn high-entropy alloy coatings are promising candidates for high-wear applications in demanding environments.

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定向能沉积制备（CoCrFeNiMn）1-x/(WC)x复合涂层的组织与磨损性能

在这项研究中，（CoCrFeNiMn）1-x/(WC)x复合涂层，WC含量分别为0、20、30和40 wt%，采用定向能沉积技术制备，以提高耐磨性和机械性能。涂层与基体具有良好的冶金结合性能，WC颗粒与HEA基体之间具有较强的界面附着力，且未出现裂纹。WC的加入显著提高了涂层的硬度，WC颗粒比HEA基体更硬，增强了基体的力学性能。使用Si3N4作为表面材料的磨损试验表明，随着WC含量的增加，耐磨性得到提高，表现为更光滑的磨损轨迹、更低的磨损率和更低的摩擦系数。磨损机制由纯HEA的磨粒磨损和氧化转变为WC强化后的更稳定的磨损行为。这些结果表明，wc增强CoCrFeNiMn高熵合金涂层是在苛刻环境下高磨损应用的有希望的候选者。

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来源期刊

Wear 工程技术-材料科学：综合

CiteScore

8.80

自引率

8.00%

发文量

280

审稿时长

47 days

期刊介绍： Wear journal is dedicated to the advancement of basic and applied knowledge concerning the nature of wear of materials. Broadly, topics of interest range from development of fundamental understanding of the mechanisms of wear to innovative solutions to practical engineering problems. Authors of experimental studies are expected to comment on the repeatability of the data, and whenever possible, conduct multiple measurements under similar testing conditions. Further, Wear embraces the highest standards of professional ethics, and the detection of matching content, either in written or graphical form, from other publications by the current authors or by others, may result in rejection.