Analysis of passive calorimetric probe measurements at high energy influxes

Kewitz, Thorben; Fröhlich, Maik; Kersten, Holger

doi:10.1140/epjti/s40485-016-0036-z

Cited by 12 publications

(9 citation statements)

References 15 publications

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“…In comparison with the plasma jet treatment and as presented with the surface energy measurements, with a scanning speed of 10, 20, and 30 m/min, there are no changes in the dispersive contribution that can be attributed to almost no modification of the surface roughness. At a lower speed of 5 m/min a slight increase of the dispersive contribution can, however, be observed and attributed to the heating effect of the plasma jet characterized by Kewitz et al [ 18 ] Plasma overtreatment of the polymer substrate can then lead to melting of the top surface, sputter, and recrystallization process that can explain here the higher surface roughness as observed using AFM characterization in the plasma treatment of polyamide using OpenAir‐Plasma activation. [ 19 ]…”

Section: Resultsmentioning

confidence: 99%

Atmospheric plasma activation and thin film deposition processes for adhesion improvement and corrosion resistance in the automotive industry

Salem

Pappas²,

Buske

2023

Plasma Processes & Polymers

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The latest trends in the automotive industry show a shift towards more lightweight, robust vehicles powered by electric energy. Light weighting can be achieved through the use of carbon‐reinforced composite materials or light metals, such as aluminum, and by using adhesives for bonding instead of rivets and bolts. In this paper, results from the characterization of plasma‐treated polypropylene using water contact angle goniometry, X‐ray photoelectron spectroscopy, and attenuated total reflectance Fourier‐transform infrared spectroscopy are presented, showing the functionalization of the surface with chemical groups originating in the plasma phase. The improved adhesion to a hot melt adhesive is discussed and linked to an industrial headlamp application. Other case studies presented involve the plasma treatment of thermoplastic elastomers for car doors, the surface modification of semi‐trailer panels, and the deposition of plasma‐derived nanocoatings on aluminum substrates to promote corrosion resistance.

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Section: Resultsmentioning

confidence: 99%

Atmospheric plasma activation and thin film deposition processes for adhesion improvement and corrosion resistance in the automotive industry

Salem

Pappas²,

Buske

2023

Plasma Processes & Polymers

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“…The templates are mounted on a microscope slide that is held upside down above the plasma by reduced pressure. For the aerographite templates, an APPJ (Plasmatreat) consisting of a FG5001 generator, a HTR12 transformer, and a RD1004 nozzle was chosen (Figure ) . At the nozzle, a precursor inlet was mounted for introducing hexamethyldisiloxane (HMDSO) into the effluent jet.…”

Section: Methodsmentioning

confidence: 99%

“…For the aerographite templates, an APPJ (Plasmatreat) [13] consisting of a FG5001 generator, a HTR12 transformer, and a RD1004 nozzle was chosen ( Figure 2). [19,20] At the nozzle, a precursor inlet was mounted for introducing hexamethyldisiloxane (HMDSO) into the effluent jet. The templates were fixed between two stainless steel grids (w = 0.08 mm, d = 0.05 mm) inside an aluminum stencil.…”

Section: Plasma Processing and Diagnosticsmentioning

confidence: 99%

Surface modification of highly porous 3D networks via atmospheric plasma treatment

Smazna

Shree

Hoppe

et al. 2018

Contributions to Plasma Physics

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Tetrapodal ZnO (T‐ZnO) and aerographite networks represent two highly open porous (94.6 and 99.96%, respectively) model materials on which the impact of an atmospheric‐pressure plasma was studied for the first time. The air plasma treatment by a surface barrier discharge caused remarkable surface modifications on the T‐ZnO template, leading to a large number of oxygen vacancies. These observations were made using scanning electron microscopy (SEM) and Raman spectroscopy. In the second proposed set‐up, pellets of aerographite material were processed to a plasma jet with pressurized air and nitrogen. Hexamethyldisiloxane (HMDSO) was introduced as a precursor into the effluent jet for nanoparticle deposition. Opposing trends in atomic concentrations versus distance to the plasma source were observed when the gas (nitrogen or pressurized air) was changed. More pronounced nanoparticle coverage occurred in the pressurized air plasma. Their distribution was studied using SEM, energy‐dispersive X‐ray (EDX), and Raman spectroscopy. Because of the higher oxidation in the pressurized air plasma treatment, the deposited nanostructures appeared to be a mixture of Si and SiOx nanoparticles.

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“…The probe design used for the present experiments was adapted to the high energy flux and high gas flow emitted by the plasma jet. The design of the probe is presented in [12] and the data analysis used in this study is the one discussed in [28].…”

Section: Introductionmentioning

confidence: 99%

Influence of the nozzle head geometry on the energy flux of an atmospheric pressure plasma jet

et al. 2021

Self Cite

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The influence of different nozzle head geometries and, therefore, the variation of the excitation and relaxation volume on the energy flux from an atmospheric pressure plasma jet to a surface have been investigated. Measurements have been performed by passive calorimetric probes under variation of the gas flow through the nozzle. The results show that the geometry of the nozzle head has a significant impact on the resulting energy flux. The relaxation volume affects the dependence of the energy flux on the gas flow. While there is no significant influence of the working gas flow on the energy flux without a relaxation volume, utilizing a relaxation volume leads to a decrease of the energy flux with increasing working gas flow. Within the analyzed parameter range, the energy flux reveals for both nozzle heads a linear dependency on the applied primary voltage.

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Analysis of passive calorimetric probe measurements at high energy influxes

Cited by 12 publications

References 15 publications

Atmospheric plasma activation and thin film deposition processes for adhesion improvement and corrosion resistance in the automotive industry

Atmospheric plasma activation and thin film deposition processes for adhesion improvement and corrosion resistance in the automotive industry

Surface modification of highly porous 3D networks via atmospheric plasma treatment

Influence of the nozzle head geometry on the energy flux of an atmospheric pressure plasma jet

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