One-step fabrication of wear resistant and friction-reducing Al2O3/MoS2 nanocomposite coatings on 2A50 aluminum alloy by plasma electrolytic oxidation with MoS2 nanoparticle additive

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

Surface & Coatings Technology Pub Date : 2025-02-01 DOI:10.1016/j.surfcoat.2025.131796

Min Zhang , Xining Ma , Siyang Zhang , Liyan Hou , Kwang Ho Kim

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引用次数: 0

Abstract

Wear resistant and friction-reducing Al₂O₃/MoS₂ nanocomposite coatings were fabricated in-situ on 2A50 aluminum alloy substrate using one-step plasma electrolytic oxidation in silicate electrolyte solution with MoS₂ nanoparticle addition. The effect of MoS₂ incorporation on microstructure and wear resistance of the obtained ceramic coatings was investigated by regulating the concentration of MoS₂ nanoparticle. Phase structure, microstructure, composition and wear resistance of the ceramic coatings were characterized by XRD, SEM, EDS, profilometer and ball-on-disc friction and wear tester. The results show that the anodic voltage of micro-arc discharge stage increased with the increasing of MoS₂ concentration and the prepared ceramic coatings were mainly composed of α-Al₂O₃, γ-Al₂O₃, MoS₂, and mullite phases. The EDS mapping results show Mo and S elements were evenly distributed in the ceramic coatings indicating the formation of Al₂O₃/MoS₂ nanocomposite coatings. Friction performance evaluation shows that the ceramic coatings obtained at the MoS₂ nanoparticle concentration of 4 g/L exhibit the best wear resistance and antifriction property. During the friction and wear test, the protective lubricant film formed between ceramic layer and grinding parts is the largest and the average friction coefficient is the lowest, as low as 0.1. The wear rate was the lowest (about 5.28 × 10⁻⁴ cm³·N⁻¹·m⁻¹). It can be concluded that MoS₂ can play a good antifriction and lubrication effect in ceramic layer, optimize the microstructure of ceramic layer, and improve the wear resistance of ceramic layer.

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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.