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@ARTICLE{Wang:280109,
author = {Wang, Tao and Begau, Christoph and Sutmann, Godehard and
Hartmaier, Alexander},
title = {{L}arge scale {M}olecular {D}ynamics simulation of
microstructure formation during thermal spraying of pure
copper},
journal = {Surface and coatings technology},
volume = {280},
issn = {0257-8972},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2015-07855},
pages = {72 - 80},
year = {2015},
abstract = {Thermal spray processes are widely used for the manufacture
of advanced coating systems, e.g. metallic coatings for wear
and corrosion protection. The desired coating properties are
closely related to the microstructure, which is highly
influenced by the processing parameters, such as
temperature, size and velocity of the sprayed particles. In
this paper, large scale Molecular Dynamics simulations are
conducted to investigate the microstructure formation
mechanisms during the spraying process of hot nano-particles
onto a substrate at room temperature using pure copper as a
benchmark material representing for a wider class of
face-centered-cubic metals. To evaluate the influence of
processing parameters on the coating morphology, a number of
simulations are performed in which the initial temperature,
size and velocity of copper particles are systematically
varied in order to investigate the thermal and
microstructural evolution during impaction. Two distinct
types of microstructural formation mechanisms, resulting in
different coating morphologies, are observed in the present
investigation, which are either governed by plastic
deformation or by the process of melting and subsequent
solidification. Furthermore, a thermodynamically motivated
model as a function of the particle temperature and velocity
is developed, which predicts the microstructural mechanisms
observed in the simulations. The results provide an
elementary insight into the microstructure formation
mechanisms on an atomistic scale, which can serve as basic
input for continuum modeling of thermal spray process.},
cin = {JSC},
ddc = {620},
cid = {I:(DE-Juel1)JSC-20090406},
pnm = {511 - Computational Science and Mathematical Methods
(POF3-511)},
pid = {G:(DE-HGF)POF3-511},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000363825100009},
doi = {10.1016/j.surfcoat.2015.08.034},
url = {https://juser.fz-juelich.de/record/280109},
}