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Nano Research & Applications
ISSN: 2471-9838
Advanced Nanotechnology 2019
EuroSciCon Conference on
Advanced Nanotechnology
S
uspension plasma spray is a promising technique for nano-structured coatings and nano-powder synthesis where nano-
particles are injected into the plasma jet with the help of liquid precursors. When the particles fly through the plasma flame,
their mass, momentum and energy will dramatically change due to the interaction with the flame. A comprehensive model was
developed to investigate the suspension spraying in the radio frequency inductively coupled plasma torch. The model is based
on hybrid Eulerian/Lagrangian coordinate system to illustrate the suspension behavior, such as suspension droplets collision,
heating and evaporation; nano or agglomerate particles heating, melting and evaporation. Special considerations are directed
to the suspension droplets collision, non-continuum effects and the influence of evaporation on heat transfer. After validation
with experimental data, the comprehensive particle model is used to predict the trajectory, velocity, temperature and size of the
in-flight nano- or agglomerate particles. A parametric analysis has been performed to find the way of controlling the operating
conditions for desirable final particle status. The parameters that have a significant influence on the spray process are identified.
The relationship between the predicted height of droplet complete evaporation and the droplet initial diameter is deduced. Finally,
results also calculate the critical size of an ethanol droplet suspended with zirconia particles, which will be completely vaporized
under present conditions.
mecqlj@126.comNumerical modelling on nano structured coating
in suspension plasma spray
Lijuan Qian
1
and Jianzhong Lin
2
1
China Jiliang University, China
2
State Key Laboratory of Fluid Power and Mechatronic Systems-Zhejiang University, China
Nano Res Appl 2019, Volume:5
DOI: 10.21767/2471-9838-C2-034