Abstract
In this study, the impact and deposition behavior of nickel particles onto relatively soft 6061-T6 aluminum alloy and copper substrates in a kinetic spray process was investigated by comparing individual particle impact with full coating deposition. The results indicated that the deposition onset of nickel coatings on the two substrates follows different deposition mechanisms depending on corresponding deformability of the impact couples (substrate and particle). Nickel particles were hardly attached onto the relatively soft 6061-T6 substrate in case of individual impact, but the deposition onset of full coating took place depending on embedding, tamping of successive impact and metallurgical “cold welds” of viscous metal at impact interface when the impinging particles’ velocity was relatively low. In case of Ni-Cu impact, the bonding formed at the peripheral impact interface dominated the deposition onset of nickel coating due to the comparable deformability of the impact couples (Ni and Cu).
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Acknowledgments
This work was supported by the Korea Science and Engineering Foundation (KOSEF) grant funded by the Korea Government (MOST) (No. 2006-02289), Natural Science Foundation of China (NSFC) (Grant Nos. 50904081 & 50721003), and the joint program NSFC-KOSEF (Grant No. 50911140283).
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Xiong, Y., Bae, G., Xiong, X. et al. The Effects of Successive Impacts and Cold Welds on the Deposition Onset of Cold Spray Coatings. J Therm Spray Tech 19, 575–585 (2010). https://doi.org/10.1007/s11666-009-9455-6
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DOI: https://doi.org/10.1007/s11666-009-9455-6