HVAF喷涂AlCuFe涂层对AA2024合金磨损和腐蚀的防护

IF 2.4 4区材料科学 Q3 MATERIALS SCIENCE, COATINGS & FILMS

Surface Engineering Pub Date : 2023-05-04 DOI:10.1080/02670844.2023.2242116

Changliang Wang, Zhang Li, M. Iefimov, B. Mordyuk

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引用次数: 0

摘要

采用高速空气燃料喷涂技术在AA2024合金上制备了准晶AlCuFe涂层。HVAF喷涂涂层在沉积状态下进行研究，随后进行退火（400°C，1 h）州。XRD、SEM和EDX分析揭示了一种两相微观结构，包括QC二十面体ψ相（体积分数为~75%）和层间bccβ相，其与用作进料材料的水雾化AlCuFe粉末中的微观结构保持相同。所使用的退火对具有良好粘合强度（>12 MPa）、高HV显微硬度（7.1 ± 0.2 GPa），纳米硬度（11.1 ± 0.2 GPa），弹性模量（169 GPa），磨损损失显著降低（0.71 μm）、摩擦系数（CoF≈0.03）和腐蚀电流密度（6.7 μm cm−2）在3.5%NaCl培养基中培养。这些特性比原始AA2024合金的特性要好得多。

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Protection of AA2024 alloy against wear and corrosion by HVAF sprayed AlCuFe coating

ABSTRACT Quasicrystalline (QC) AlCuFe coating is produced on the AA2024 alloy using high-velocity air-fuel (HVAF) spraying. The HVAF sprayed coatings are studied in as-deposited and subsequently annealed (400°C, 1 h) states. XRD, SEM, and EDX analysis revealed a two-phase microstructure comprising QC icosahedral ψ-phase (the volume fraction of ∼75%) and interlayered bcc β-phase that remains the same as that in a water-atomized AlCuFe powder used as feeding material. The used annealing exerts a negligible effect on the protective properties of the HVAF coating that possesses good adhesion strength (>12 MPa), a high HV microhardness (7.1 ± 0.2 GPa), nanohardness (11.1 ± 0.2 GPa), elastic modulus (169 GPa), the essentially lowered wear losses (0.71 μm), coefficient of friction (CoF≈0.03), and corrosion current density (6.7 μm cm−2) in a 3.5%NaCl medium. These characteristics are much better than those of the original AA2024 alloy.

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来源期刊

Surface Engineering 工程技术-材料科学：膜

CiteScore

5.60

自引率

14.30%

发文量

审稿时长

2.3 months

期刊介绍： Surface Engineering provides a forum for the publication of refereed material on both the theory and practice of this important enabling technology, embracing science, technology and engineering. Coverage includes design, surface modification technologies and process control, and the characterisation and properties of the final system or component, including quality control and non-destructive examination.