Superior corrosion-resistant cold sprayed titanium coatings with fully dense microstructure after electron beam modification

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2025-06-30 DOI:10.1016/j.jallcom.2025.181978

Yingkang Wei, Wenhao Zhang, Xin Chu, Tiantian Luo, Shifeng Liu, Wenpeng Jia, Jilei Zhu, Yingchun Xie, Xiaotao Luo

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Abstract

In this study, electron beam modification (EBM) technology was employed to enhance the surface properties of cold-sprayed (CS) titanium (Ti) coatings without inducing oxidation or compromising adhesion strength. The influence of EBM on corrosion behavior was investigated by analyzing porosity reduction and microstructural evolution. EBM effectively eliminates defects inherent to the CS process, and significantly reduces porosity from 11.5% to < 0.5% by adjusting the energy input between 29 ~ 62 J mm^-3. The resulting melted layer consists of fine lamellar α Ti grains with dispersed needle-like α’ Ti phases (1.6 ± 0.5 μm). Electrochemical analysis demonstrates that EBM-processed CS Ti coatings maintain impermeability even after 24 h immersion in 10 wt.% HCl solution, confirming enhanced corrosion protection performance. Furthermore, the EBM melted layer (energy input: 45 J mm^-3) exhibits a lower corrosion current density (0.8 μA cm^-2) and higher charge transfer resistance (2190 Ω cm²) compared to bulk TA1 (1.2 μA cm^-2, 513 Ω cm²), indicating superior corrosion resistance. These results validate EBM as an effective method for enhancing the surface integrity and corrosion protection performance of CS Ti coatings. This study presents a novel, environmentally friendly, and cost-effective approach for fabricating high-quality, corrosion-resistant CS Ti coatings.

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电子束改性后的耐腐蚀冷喷涂钛涂层具有致密的显微组织

在本研究中，采用电子束改性（EBM）技术来提高冷喷涂（CS）钛（Ti）涂层的表面性能，而不会引起氧化或降低附着力。通过分析孔隙率降低和微观组织演变，研究了EBM对腐蚀行为的影响。EBM有效地消除了CS工艺固有的缺陷，并将孔隙度从11.5%显著降低到<；在29 ~ 62 J mm-3之间调节能量输入，可得到0.5%。熔化层由细小的片层状α Ti晶粒和分散的针状α′Ti相组成（1.6±0.5 μm）。电化学分析表明，ebm处理的CS Ti涂层即使在10 wt.%的HCl溶液中浸泡24小时也能保持抗渗性，证实了增强的防腐性能。此外，EBM熔化层（能量输入为45 J mm-3）具有较低的腐蚀电流密度（0.8 μA cm-2）和较高的电荷转移电阻（2190 Ω cm2），表明其具有较好的耐腐蚀性（1.2 μA cm-2, 513 Ω cm2）。这些结果验证了EBM是提高CS Ti涂层表面完整性和防腐性能的有效方法。本研究提出了一种新颖、环保、经济的方法来制造高质量、耐腐蚀的CS Ti涂层。

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.