Thermal sprayed nanoscale materials produce coatings with enhanced properties. Thermally spraying nanopowders, in non-agglomerated form, include several potential advantages. These advantages can not be tested because nanoparticles do not have the inertia required to cross streamlines in typical plasma spray flows. Hence, they are swept away without depositing on the substrate. Analysis of inertial deposition reveals that the non-dimensional Stokes number largely characterizes deposition efficiency. Under low pressure plasma spray conditions, with reduced stand-off distance, the Stokes number of nanopowders can be made to approach the Stokes numbers of typical thermal spray powders. This paper explores the conditions that make the inertial deposition efficiency of nanoparticles quantitatively similar to the typical inertial deposition efficiency of microparticles. Paper includes a German-language abstract.

This content is only available as a PDF.
You do not currently have access to this content.