Microstructure, wear properties and corrosion resistance of thermal sprayed FeCoCrNiBSi high-entropy amorphous coatings

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology Pub Date : 2025-05-29 DOI:10.1016/j.surfcoat.2025.132341

Liwei Hua , Jiangbo Cheng , Lin Xue , Peisong Song , Baosen Zhang

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引用次数: 0

Abstract

This work aims to prepare novel FeCoCrNiBSi high-entropy amorphous alloy coatings using atmospheric plasma spraying (APS) and high-velocity air-fuel (HVAF) spraying techniques. Further, the microstructure, mechanical characteristics, wear resistance, and corrosion resistance of the prepared coatings are comprehensively examined. The findings reveal that both APS and HVAF-sprayed coatings exhibit a typical laminar structure. The HVAF coating demonstrates significantly lower porosity than the APS coating. Brittle spalling is identified as the primary wear mechanism, with the HVAF coating showing approximately five times greater wear resistance than the APS coating. After 10 days of immersion in 3.5 wt% NaCl solution, the self-corrosion current density of the HVAF coating is found to be 1.15 μA/cm², which is significantly lower than that of the APS coating (4.05 μA/cm²). Additionally, the charge transfer resistance of the HVAF coating is 43,387 Ω·cm², which is approximately 3.5 times higher than that of the APS coating. The outstanding corrosion resistance of the HVAF coating can be ascribed to the formation of a stable passive layer on its surface. Overall, this study offers useful insights into the development of economical, high-performance coating materials and key technologies for preparing high-entropy amorphous alloys.

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热喷涂feccrnibsi高熵非晶涂层的组织、磨损性能和耐蚀性

本工作旨在利用大气等离子喷涂（APS）和高速空气燃料（HVAF）喷涂技术制备新型FeCoCrNiBSi高熵非晶合金涂层。此外，还对制备的涂层的显微组织、力学特性、耐磨性和耐腐蚀性进行了全面的测试。结果表明，APS涂层和hvaf涂层均呈现出典型的层流结构。HVAF涂层的孔隙率明显低于APS涂层。脆性剥落被认为是主要的磨损机制，HVAF涂层的耐磨性比APS涂层高约5倍。在3.5 wt% NaCl溶液中浸泡10 d后，HVAF涂层的自腐蚀电流密度为1.15 μA/cm2，明显低于APS涂层的4.05 μA/cm2。HVAF涂层的电荷转移电阻为43,387 Ω·cm2，约为APS涂层的3.5倍。HVAF涂层优异的耐腐蚀性能可归因于其表面形成了稳定的钝化层。总的来说，这项研究为开发经济、高性能的涂层材料和制备高熵非晶合金的关键技术提供了有益的见解。

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

Surface & Coatings Technology 工程技术-材料科学：膜

CiteScore

10.00

自引率

11.10%

发文量

921

审稿时长

19 days

期刊介绍： Surface and Coatings Technology is an international archival journal publishing scientific papers on significant developments in surface and interface engineering to modify and improve the surface properties of materials for protection in demanding contact conditions or aggressive environments, or for enhanced functional performance. Contributions range from original scientific articles concerned with fundamental and applied aspects of research or direct applications of metallic, inorganic, organic and composite coatings, to invited reviews of current technology in specific areas. Papers submitted to this journal are expected to be in line with the following aspects in processes, and properties/performance: A. Processes: Physical and chemical vapour deposition techniques, thermal and plasma spraying, surface modification by directed energy techniques such as ion, electron and laser beams, thermo-chemical treatment, wet chemical and electrochemical processes such as plating, sol-gel coating, anodization, plasma electrolytic oxidation, etc., but excluding painting. B. Properties/performance: friction performance, wear resistance (e.g., abrasion, erosion, fretting, etc), corrosion and oxidation resistance, thermal protection, diffusion resistance, hydrophilicity/hydrophobicity, and properties relevant to smart materials behaviour and enhanced multifunctional performance for environmental, energy and medical applications, but excluding device aspects.