Abstract
In a previous study, it has been experimentally demonstrated that surface oxide films of metallic particles have significant influence on the properties of cold-sprayed coatings. To clearly reveal the underlying mechanism, this study focused further on the effect of particle oxidation on the deposition behavior of oxidized Cu powder. Results show that the presence of the oxide films on the particles’ surface can inhibit the plastic deformation of the particles. In addition, results concerning the morphologies and oxygen content of the rebounded particles show that the particles have experienced large plastic deformation that results in the break-up of the oxide films during the impacting process. Correspondingly, the hardness of the coating deposited with the oxidized powder is a little lower than that with the annealed powder because of the inferior plastic deformation and strain-hardening effect.
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Acknowledgments
The authors would like to gratefully acknowledge the financial supports from the National Natural Science Foundation of China (51005180), the Fok Ying-Tong Education Foundation for Young Teachers in the Higher Education Institutions of China (131052), the Research Fund of the State Key Laboratory of Solidification Processing (NPU, China) (69-QP-2011), and the 111 Project (B08040).
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This article is an invited paper selected from presentations at the 2012 International Thermal Spray Conference and has been expanded from the original presentation. It is simultaneously published in Thermal Spray 2012: Proceedings of the International Thermal Spray Conference, Air, Land, Water, and the Human Body: Thermal Spray Science and Applications, Houston, Texas, USA, May 21-24, 2012, Basil R. Marple, Arvind Agarwal, Laura Filofteia-Toma, Margaret M. Hyland, Yuk-Chiu Lau, Chang-Jiu Li, Rogerio S. Lima, and André McDonald, Ed., ASM International, Materials Park, OH, 2012.
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Yu, M., Li, W., Guo, X. et al. Impacting Behavior of Large Oxidized Copper Particles in Cold Spraying. J Therm Spray Tech 22, 433–440 (2013). https://doi.org/10.1007/s11666-012-9849-8
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DOI: https://doi.org/10.1007/s11666-012-9849-8