Copper Cold Gas-Dynamic Spray Processing for Highly Effective Antipathogenic Coatings: An Integrated Microstructural, Mechanics, and Materials Chemistry Perspective

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Copper Cold Gas-Dynamic Spray Processing for Highly Effective Antipathogenic Coatings: An Integrated Microstructural, Mechanics, and Materials Chemistry Perspective

March 6, 2021 Chemical Science 0

The motivation for this endeavour is to gain a better understanding of microstructural characteristics, materials surface and bulk chemistry, as well as properties of cold sprayed traditional copper and nanostructured copper coatings in terms of antipathogenic contact killing and inactivation applications. During this work, the task of high strain rate induced severe plastic deformation states, microstructures, electrochemical behaviours, surface chemistry, and surface roughness for two copper cold spray material consolidations were characterised, which were developed from conventionally gas-atomized copper powder as well as a nano-agglomerated and spray-dried copper feedstock powder. Prior research has shown that the nanostructured Cu coating has a higher antipathogenic efficacy than the traditional Cu coating. As a result, microstructural analysis was carried out to determine discrepancies between the two coatings so that their respective pathogen killing and/or inactivation rates could be deduced and tested. Advanced laser-induced projectile impact testing, X-ray diffraction, scanning electron microscopy, electron backscatter diffraction, scanning transmission microscopy, nanoindentation testing, energy-dispersive X-ray spectroscopy, confocal microscopy, atomic force microscopy, linear polarisation, X-ray photoelectron spectroscopy, electrochemical impedance spectroscopy, and copper ion rheology results.

Author (s) Details

Bryer C. Sousa
Materials Science and Engineering Program, Department of Mechanical Engineering, Worcester Polytechnic Institute, Worcester, MA, 01609, USA.

Dr. Danielle L. Cote
Materials Science and Engineering Program, Department of Mechanical Engineering, Worcester Polytechnic Institute, Worcester, MA, 01609, USA.

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