5. Deposition mechanisms
Cold spray leads to deposition if and only if the sprayed particles can adhere to the substrate and to each other as they accumulate with densification. This condition led, shortly after the advent of the process, to the definition of the notion of critical speed. This reflects the impact behavior of the sprayed particle, with its mechanical part via plastic deformation, and its metallurgical part via metallurgical transformations at the particle-substrate interface. The word substrate is taken in its general sense and can therefore represent, for example, a particle that has already been deposited. Improving particle impact behavior to meet critical velocity conditions requires mechanical and/or metallurgical modifications to the material system at impact. Studying these modifications is tantamount to assessing the "impact of impacts". The main ones will be described when we review the...
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Deposition mechanisms
Building the depot
Bibliography
Standardization
- Metallic materials – Rotary bar bending fatigue tests. - BS ISO 1143 :2010 - Décembre 2010
- Essai d'adhérence par traction de revêtements projetés thermiquement. - ASTM C633-13 - 2017
- Thermal spraying – Tensile adhesion testing. - NF EN ISO 14916 - Mai 2017
- Particle size analysis – Laser diffraction methods. - ISO 13320 - Janvier 2020
- Environmental management – Lifecycle analysis – Principles...
Regulations
ATEX Directive 201/34/EU on equipment and protective systems intended for use in potentially explosive atmospheres.
Patents
DANTIN (B.) et al. – Airbus Group SAS, Structure with electrically conductive lines on the surface and process for producing electrically conductive lines by cold spray, Patent WO 2016/107918 A1, 2016.
CHOHRA (M.) et al. – Dassault-Aviation, Composite part featuring a functional layer and a polymer binder, and associated cold spray manufacturing process. French patent # 3 006 914, 2013.
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Directory
Manufacturers – Suppliers – Distributors (non-exhaustive list)
For high-pressure cold spray: Impact Innovations/Rattenkirchen-Germany
https://impact-innovations.com
For low-pressure cold spray: CenterLine Ltd./Windsor-Canada.
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