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Leibniz Institute for Plasma Science and Technology
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17489 Greifswald
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The Leibniz Institute for Plasma Science and Technology (INP) is the largest non-university institute in the field of low temperature plasmas, their basics and technical applications in Europe. The institute carries out research and development from idea to prototype. The topics focus on the needs of the market. At present, plasmas for materials and energy as well as for environment and health are the focus of interest.

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Effect of a spatially fluctuating heating of particles in a plasma spray process - Dataset

Materials / Surfaces

The work is concerned with the effect of a spatially fluctuating heating of Al_2O_3 particles with diameters of 5–120 μm during a plasma spray process. A plasma jet is generated in a mixture of Ar (40 NLPM) and H_2 (14 NLPM) and in pure Ar at an electric current of 600 A. The tracing of the injected particles in the plume region of the plasma jets is considered in the framework of a three-dimensional model taking into account a turbulent fluid flow. It is shown that the heat source for the injected particles exhibits a well pronounced spatially fluctuating structure due to the enhancement of the thermal conductivity resulting from dissociation and ionization of the molecular gas in the temperature range of 2500–4000 K and 13000–14000 K, respectively. During their travel towards the substrate, the particles are therefore repeatedly heated in the gas mixture in contrast to the case of pure argon. Particles injected in the gas mixture reach the substrate with a higher average temperature and velocity.

plasma processing
FieldValue
Group
INP
Authors
Zhu, Tao
Baeva, Margarita
Testrich, Holger
Kewitz, Thorben
Foest, Rüdiger
Release Date
2022-05-13
Identifier
7a581f22-499c-4050-b2bb-09dab8f881bd
Permanent Identifier (DOI)
10.34711/inptdat.571
Permanent Identifier (URI)
https://www.inptdat.de/node/571
Is supplementing
10.1007/s11090-022-10290-y
Plasma Source Name
Oerlikon Metco F4MB-XL
Plasma Source Application
coating
Plasma Source Specification
DC
atmospheric pressure
thermal
Plasma Source Properties

The plasma spray torch considered in the present study is the commercial device Oerlikon Metco F4MB-XL. This is characterized by a single-cathode and a single-anode arrangement. The WL10 cathode by Plansee is made of lantanated tungsten and sticks to a copper holder. The nozzle is cylindrically symmetric and serves as anode. Its cylindrical fragment is partly made of tungsten. The cathode base and the nozzle are water cooled. The gas is fed between the cathode and the anode. The electric current is 600 A.
Plasma Source Procedure

Al2O3 powder is injected into the plasma jet. The particle size varies between a few µm and 120 µm.
Plasma Medium Name
Ar
H2
Plasma Medium Properties

The plasma is generated in a mixture of Ar (40 NLPM) and H2 (14 NLPM) and in pure Ar.
Plasma Medium Procedure

A plasma jet is generated in a mixture of Ar (40 NLPM) and H2 (14 NLPM) and in pure Ar at an electric current of 600 A.
Plasma Diagnostics Name
CFD simulations
turbulence model
Language
English
License
Creative Commons Attribution 4.0 International (CC BY 4.0)
Public Access Level
Public
Contact Name
Margarita Baeva
Contact Email
baeva@inp-greifswald.de

Data and Resources