Abstract
In this research, the large gas-atomized copper powder was selected as the feedstock. Some powder was annealed in a vacuum circumstance to avoid the effect of grain boundaries on the high velocity impact behavior of particles during cold spraying. The annealed Cu powder was deposited by cold spraying with respect to the single impacts and coating deposition under certain gas condition. In addition, the rebounded copper particles were collected for morphology analysis compared to the adhered particles. The results show that the average size of the rebounded particles is apparently increased compared with the starting powder because of the rebounding of larger particles and intensive plastic deformation of the rebounded particles. For the deposited particles, obvious plastic deformation causes a higher hardness to the coating. It is found that the rebounded particles have also experienced large deformation and shear instability at the impact interfaces.
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Acknowledgments
This study was partially supported by the Ao-Xiang Star Project of NPU (Northwestern Polytechnical University), and the Program for New Century Excellent Talents in University by the Ministry of Education of the People’s Republic of China and the 111 Project (B08040).
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This article is an invited paper selected from presentations at the 2010 International Thermal Spray Conference and has been expanded from the original presentation. It is simultaneously published in Thermal Spray: Global Solutions for Future Applications, Proceedings of the 2010 International Thermal Spray Conference, Singapore, May 3-5, 2010, Basil R. Marple, Arvind Agarwal, Margaret M. Hyland, Yuk-Chiu Lau, Chang-Jiu Li, Rogerio S. Lima, and Ghislain Montavon, Ed., ASM International, Materials Park, OH, 2011.
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Li, W., Guo, X., Yu, M. et al. Investigation of Impact Behavior of Cold-Sprayed Large Annealed Copper Particles and Characterization of Coatings. J Therm Spray Tech 20, 252–259 (2011). https://doi.org/10.1007/s11666-010-9533-9
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DOI: https://doi.org/10.1007/s11666-010-9533-9