Research output: Contribution to journal › Article › peer-review
Fluoropolymer coatings deposited on rotating cylindrical surfaces by HW CVD : Experiment and simulation. / Bykov, Nikolay Y.; Ronshin, Fedor V.; Safonov, Alexey I. et al.
In: Journal of Physics D: Applied Physics, Vol. 54, No. 22, 225204, 03.06.2021.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Fluoropolymer coatings deposited on rotating cylindrical surfaces by HW CVD
T2 - Experiment and simulation
AU - Bykov, Nikolay Y.
AU - Ronshin, Fedor V.
AU - Safonov, Alexey I.
AU - Starinskiy, Sergey V.
AU - Sulyaeva, Veronica S.
N1 - Publisher Copyright: © 2021 IOP Publishing Ltd. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/6/3
Y1 - 2021/6/3
N2 - The hot wire chemical vapor deposition method has been adapted to deposit fluoropolymer coatings on small-radius rotating surfaces. The influence of the rotational frequency of a cylindrical sample during the deposition process on the formation of a layer of fluoropolymer coating was studied. It was found that the rotational frequency of the cylindrical sample significantly changed the morphology of the resulting coating. It was shown that with an increase in the sample's rotational frequency from 1 to 100 rpm, the deposition rate decreased and the coating structure degraded. To establish the reasons for this effect, a numerical study of the flow around a rotating cylindrical sample was carried out for a range of low gas velocities and densities in the reactor. The simulations are based on solving the Navier-Stokes equation with no slip and velocity slip boundary conditions for a rotating surface. It was found that the main reason for the decrease in the deposition rate was associated with the effect of the formation of a closed circulation flow region above the sample's surface during rotation. The dependence of the characteristic size of this region on the rotational frequency of the cylinder sample was close to linear. The effects of surface boundary conditions were also analyzed.
AB - The hot wire chemical vapor deposition method has been adapted to deposit fluoropolymer coatings on small-radius rotating surfaces. The influence of the rotational frequency of a cylindrical sample during the deposition process on the formation of a layer of fluoropolymer coating was studied. It was found that the rotational frequency of the cylindrical sample significantly changed the morphology of the resulting coating. It was shown that with an increase in the sample's rotational frequency from 1 to 100 rpm, the deposition rate decreased and the coating structure degraded. To establish the reasons for this effect, a numerical study of the flow around a rotating cylindrical sample was carried out for a range of low gas velocities and densities in the reactor. The simulations are based on solving the Navier-Stokes equation with no slip and velocity slip boundary conditions for a rotating surface. It was found that the main reason for the decrease in the deposition rate was associated with the effect of the formation of a closed circulation flow region above the sample's surface during rotation. The dependence of the characteristic size of this region on the rotational frequency of the cylinder sample was close to linear. The effects of surface boundary conditions were also analyzed.
KW - CFD
KW - deposition
KW - flow past a cylinder
KW - fluoropolymer
KW - HW CVD
KW - rarefaction effects
KW - rotating cylinder
UR - http://www.scopus.com/inward/record.url?scp=85103151653&partnerID=8YFLogxK
U2 - 10.1088/1361-6463/abe8fd
DO - 10.1088/1361-6463/abe8fd
M3 - Article
AN - SCOPUS:85103151653
VL - 54
JO - Journal Physics D: Applied Physics
JF - Journal Physics D: Applied Physics
SN - 0022-3727
IS - 22
M1 - 225204
ER -
ID: 28203766