Journal
APPLIED SURFACE SCIENCE
Volume 252, Issue 22, Pages 7809-7814Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2005.09.015
Keywords
kinetic spraying; cold gas dynamic spraying; bond strength; high velocity impact
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Kinetic spraying (or cold gas dynamic spraying) works by accelerating small solid particles to supersonic velocities, and then impacting them onto a substrate. These high impact velocities, and low particle temperatures are the principal attributes of kinetic spraying technology. However, only recently has this technology's interfacial behavior, due to particle/substrate impaction, become well understood. In order to investigate the particle/substrate bond behavior, Al-Si feedstock was deposited onto mild steel, over a range of particle velocities; next, their respective coating bond strengths were measured by the stud pull coating adherence test. The effects of the particle velocity and the substrate surface roughness on the coating bond strength were presented, and a model of the particle/substrate bond generation was discussed in an effort to estimate the bond strength. (c) 2005 Elsevier B.V. All rights reserved.
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