Reconstructed oxide scale driving fracture behavior to improve cold spray bonding

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS Surface & Coatings Technology Pub Date : 2025-04-03 DOI:10.1016/j.surfcoat.2025.132123

Xiao-Xue Dong, Mei-Jun Liu, Xiao-Tao Luo, Guan-Jun Yang, Chang-Jiu Li

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Abstract

Cold spraying is a promising technology for biomedical and aerospace applications, yet weak inter-particle bonding remains a critical limitation to coating quality. This study introduces a novel approach to enhance interfacial bonding by reconstructing the oxide scale on titanium alloy powders. The reconstructed oxide scale features a loose and more friable structure that facilitates controlled fracture during particle impact, exposing more fresh metallic surfaces and enabling more metallurgical bonding. AC-STEM and interfacial analyses reveal that this reconstructed oxide scale significantly reduces the barrier effect of surface oxides, promoting stronger inter-particle bonding. Bond strength tests confirm substantial improvements in coating performance, demonstrating the potential of oxide scale reconstruction as an innovative strategy to optimize cold-sprayed coatings. These findings offer valuable insights into surface engineering for enhancing interfacial properties and advancing cold spray technology.

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重建氧化皮驱动断裂行为，改善冷喷涂粘接

冷喷涂技术在生物医学和航空航天领域具有广阔的应用前景，但颗粒间结合薄弱仍然是影响涂层质量的关键因素。本研究介绍了一种通过重建钛合金粉末表面氧化层来增强界面结合的新方法。重建的氧化膜具有松散且易碎的结构，有利于颗粒撞击时的可控断裂，暴露出更多新鲜的金属表面，并实现更多的冶金结合。AC-STEM和界面分析表明，这种重建的氧化垢显著降低了表面氧化物的屏障效应，促进了更强的颗粒间键合。结合强度测试证实了涂层性能的显著改善，表明了氧化垢重建作为优化冷喷涂涂层的创新策略的潜力。这些发现为提高界面性能和推进冷喷涂技术的表面工程提供了有价值的见解。

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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.