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Effect of substrate roughness on splatting behavior of HVOF polymer particles: modeling and experiments
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|Title: ||Effect of substrate roughness on splatting behavior of HVOF polymer particles: modeling and experiments|
|Authors: ||Knight, Richard|
Cairncross, Richard A.
Twardowski, T. E.
Baldoni, J. A.
|Issue Date: ||Dec-2006|
|Publisher: ||ASM International|
|Citation: ||Journal of Thermal Spray Technology, 15(4): pp. 725-730.|
|Abstract: ||A three-dimensional model of particle impact and deformation
on rough surfaces has been developed for HVOF sprayed
polymer particles. Fluid flow and particle deformation was
predicted by the Volume of Fluid (VoF) method using Flow-
3D® software. The effect of roughness on the mechanics of
splatting and final splat shapes was explored through the use
of several prototypical rough surfaces, e.g. steps and grooves.
In addition, a numerical representation of a more realistic
rough surface, generated by optical interferometry of an actual
grit blasted steel surface, was also incorporated into the model.
Predicted splat shapes were compared with SEM images of
Nylon 11 splats deposited onto grit blasted steel substrates.
Rough substrates led to the generation of fingers and other
asymmetric three-dimensional instabilities that are seldom
observed in simulations of splatting on smooth substrates.|
|Appears in Collections:||Faculty Research and Publications (MSE)|
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