A novel antibacterial and biocompatible Ta-Ag coating fabricated by cold spray technology
Citation:
Pengfei Yu, Katelyn J Genoud, Yingchun Xie, Fergal J O'Brien, Shuo Yin, Rocco Lupoi, A novel antibacterial and biocompatible Ta-Ag coating fabricated by cold spray technology, International Thermal Spray Conference 2023 (ITSC 2023), Quebec City (Canada)Abstract:
Infection caused by bacterial contamination is a critical
problem challenging the successful use of medical implants in
orthopaedic and dental applications. Consequently, medical
implants with antibacterial abilities are in high demand.
Tantalum and silver have been previously characterized to have
excellent biocompatibility and antibacterial ability, but due to
their significantly different properties, it is challenging to
manufacture Ta-Ag components via thermal processing
methods. Herein, by taking advantage of the unique
characteristics of cold spray (CS) technology, an antibacterial
Ta-Ag coating was successfully fabricated for the first time. In
the CS process, blended Ta-Ag powders with different Ag
concentrations were used to fabricate CS Ta-Ag coatings. Their
antibacterial ability was preliminary tested and deposition
behaviour was systematically investigated. The coating
significantly reduced the metabolic activity of S. aureus
bacteria, and a better deposition efficiency was obtained by
blended Ta-Ag powder. It was found that soft Ag could
aggregate in the coating and hard Ta particles were prone to
rebound, which induced the peening effect for Ag and mass loss
of Ta in the final coating Moreover, the clue of metallurgy
bonding between Ta and Ag was detected in the region that
experienced severe deformation despite their immiscibility.
Author's Homepage:
http://people.tcd.ie/lupoir
Author: Lupoi, Rocco
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International Thermal Spray Conference 2023 (ITSC 2023)Type of material:
Conference PaperAvailability:
Full text availableDOI:
https://doi.org/10.31399/asm.cp.itsc2023p0054Metadata
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