The effect of heat treatment on promoting the precipitation of Al2Cu and its influence on the tribological properties of plasma-sprayed AlSi30Cu5 coating

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

Surface & Coatings Technology Pub Date : 2025-01-28 DOI:10.1016/j.surfcoat.2025.131852

Guowei Yang , Jiahao Zhang , Jingkun Li , Binguo Fu , Boya Li

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引用次数: 0

Abstract

To further enhance the wear resistance of AlSi30 coating, this study introduced Cu element, which could react with Al to form θ-Al₂Cu reinforcing phases. Plasma spraying technology was utilized to prepare both AlSi30 and AlSi30Cu5 coatings, and the AlSi30Cu5 coating underwent appropriate heat treatment (330 °C for 24 h). Subsequently, wear resistance tests were conducted on the AlSi30, AlSi30Cu5, and heat-treated AlSi30Cu5 (HT-AlSi30Cu5) coatings at room temperature and high temperature (210 °C). The impact mechanism of heat treatment on the precipitation of θ-Al₂Cu and its influence on tribological properties were discussed in detail. The results indicated that, compared to the AlSi30 and AlSi30Cu5 coatings, the HT-AlSi30Cu5 coating exhibited reduced porosity, a denser microstructure, and smoother and rounded Si phases without significant size increase. After aging heat treatment, a large number of submicron-sized θ-Al₂Cu high-temperature stable reinforcing phases precipitated within the AlSi30Cu5 coating, providing significant dispersion strengthening to the coating. This is a crucial factor enabling the HT-AlSi30Cu5 coating to maintain excellent wear resistance at both room temperature and 210 °C, improving by 51 % and 38 % respectively compared to the AlSi30Cu5 coating.

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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.