Agglomerated nanostructured particles disintegration during the plasma thermal spraying process

The aim of this study is to analyse the behaviour of the agglomerated nano-hydroxyapatite particles in the plasma jet, before they impact on the substrate. The thermal field and velocity distribution in the plasma jet are analytically calculated; therefore the particles acceleration and surface heating of these are also analytically evaluated. Finite element analysis is employed to calculate the thermal field evolution inside the agglomerated particles, thus the thermal induced internal stress distribution is determined. The main goal of using nanostructured feedstock is to preserve the nanostructure in the deposed layers morphology.