Details
| Original language | English |
|---|---|
| Pages (from-to) | 502-508 |
| Number of pages | 7 |
| Journal | Journal of Thermal Spray Technology |
| Volume | 22 |
| Issue number | 4 |
| Early online date | 13 Feb 2013 |
| Publication status | Published - Apr 2013 |
Abstract
The main aim of this study is to improve the coating properties of three-cathode atmospheric plasma-sprayed coatings with respect to porosity and residual stresses. This was done by means of numerical simulation coupled with advanced diagnostic methods. A numerical model for the triple injection of alumina feedstock, as well as acceleration and heating of the powder particles in the characteristic threefold symmetrical plasma jet cross section produced by a three-cathode-plasma torch, was developed. The modeling results for the standard injector's position "0" were calculated and experimentally verified by laser Doppler anemometry. Based on the criteria defined for the concentrated feedstock transport and homogeneous thermal treatment of powder particles in the plasma jet, the optimal injection position was found. In the next step, a previously developed, coupled CFD-FEM-simulation model was used for simulations of the coating build-up, describing flattening, solidification, and deformation due to shrinkage for alumina particles on a rough substrate surface.
Keywords
- atmospheric plasma spray (APS), computational fluid dynamics, diagnostics, finite element modeling, heat transfer, modeling of coating formation, particle plasma interaction
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Condensed Matter Physics
- Materials Science(all)
- Surfaces, Coatings and Films
- Materials Science(all)
- Materials Chemistry
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In: Journal of Thermal Spray Technology, Vol. 22, No. 4, 04.2013, p. 502-508.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Improvement of coating properties in three-cathode atmospheric plasma spraying
AU - Bobzin, K.
AU - Kopp, N.
AU - Warda, T.
AU - Petković, I.
AU - Zimmermann, S.
AU - Hartz-Behrend, K.
AU - Landes, K.
AU - Forster, G.
AU - Kirner, S.
AU - Marqués, J. L.
AU - Schein, J.
AU - Prehm, J.
AU - Möhwald, K.
AU - Bach, Fr W.
N1 - Funding Information: The authors gratefully acknowledge the financial support of the German Research Foundation (DFG) within the project ‘‘Homogenization of Coating Properties in Atmospheric Plasma Spraying’’ (PAK 193).
PY - 2013/4
Y1 - 2013/4
N2 - The main aim of this study is to improve the coating properties of three-cathode atmospheric plasma-sprayed coatings with respect to porosity and residual stresses. This was done by means of numerical simulation coupled with advanced diagnostic methods. A numerical model for the triple injection of alumina feedstock, as well as acceleration and heating of the powder particles in the characteristic threefold symmetrical plasma jet cross section produced by a three-cathode-plasma torch, was developed. The modeling results for the standard injector's position "0" were calculated and experimentally verified by laser Doppler anemometry. Based on the criteria defined for the concentrated feedstock transport and homogeneous thermal treatment of powder particles in the plasma jet, the optimal injection position was found. In the next step, a previously developed, coupled CFD-FEM-simulation model was used for simulations of the coating build-up, describing flattening, solidification, and deformation due to shrinkage for alumina particles on a rough substrate surface.
AB - The main aim of this study is to improve the coating properties of three-cathode atmospheric plasma-sprayed coatings with respect to porosity and residual stresses. This was done by means of numerical simulation coupled with advanced diagnostic methods. A numerical model for the triple injection of alumina feedstock, as well as acceleration and heating of the powder particles in the characteristic threefold symmetrical plasma jet cross section produced by a three-cathode-plasma torch, was developed. The modeling results for the standard injector's position "0" were calculated and experimentally verified by laser Doppler anemometry. Based on the criteria defined for the concentrated feedstock transport and homogeneous thermal treatment of powder particles in the plasma jet, the optimal injection position was found. In the next step, a previously developed, coupled CFD-FEM-simulation model was used for simulations of the coating build-up, describing flattening, solidification, and deformation due to shrinkage for alumina particles on a rough substrate surface.
KW - atmospheric plasma spray (APS)
KW - computational fluid dynamics
KW - diagnostics
KW - finite element modeling
KW - heat transfer
KW - modeling of coating formation
KW - particle plasma interaction
UR - http://www.scopus.com/inward/record.url?scp=84885602677&partnerID=8YFLogxK
U2 - 10.1007/s11666-013-9902-2
DO - 10.1007/s11666-013-9902-2
M3 - Article
AN - SCOPUS:84885602677
VL - 22
SP - 502
EP - 508
JO - Journal of Thermal Spray Technology
JF - Journal of Thermal Spray Technology
SN - 1059-9630
IS - 4
ER -