Biomedical Engineering Reference
In-Depth Information
accelerate particles to supersonic muzzle velocities. The objectives of this
study are to develop a device capable of accelerating particles to
supersonic speeds in a simple and cost-effective manner when compared
to similar existing technologies, and to develop a device suitable for the
investigation of the effect of impacts on substrate materials.
Keywords:
Nanomanufacturing, nanoparticles, deposition, projector, medical
devices
1.
I
NTRODUCTION
Surface coatings have been applied to a wide range of materials and
products throughout history. Rationale and purposes for coating products
range anywhere from painting for aesthetic purposes, galvanizing steel to
prevent oxidation, and coating machine cutting tools to achieve higher
productivity. However, all of these applications have one thing in common: to
achieve a desirable characteristic in the substrate material that is not originally
present or exhibited in the bare substrate.
Traditional processes to coat a metal substrate with a different material
have limitations such as material types and properties of the coating material.
The possibility of particle deposition through high-speed impacts onto a
substrate material has opened up the possibility to investigate the feasibility of
depositing materials and particles with properties, which are not possible with
other existing processes. While processes developed recently exist to
investigate this phenomenon, it would be desirable to develop a product for
investigation purposes that is capable of producing the desired impacts in a
simple, cost effective manner.
Advances in surface engineering technologies have garnered substantial
research interest in the study of particle impacts in recent years. While
historically research interest has focused on low speed and hypervelocity
impacts, the advent of recent technologies, such as thermal spray and cold gas
dynamic spray, have caused an increased demand to examine impacts of
varying material types, impact velocities, and particle size. While much recent
research has sought to explore impacts caused by different combinations of
these three variables with the aim of achieving desirable surface effects on
substrates, many combinations remain unexplored, as illustrated in Figure 1
(Klinkov, Kosarev, and Reain, 2005).
