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Improved homogeneity of plasma and coating properties using a lance matrix gas distribution in MW-PECVD / Dennis Kirchheim in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 2 (03/2019)
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Titre : Improved homogeneity of plasma and coating properties using a lance matrix gas distribution in MW-PECVD Type de document : texte imprimé Auteurs : Dennis Kirchheim, Auteur ; Stefan Wilski, Auteur ; Montgomery Jaritz, Auteur ; Felix Mitschker, Auteur ; Moritz Oberberg, Auteur ; Jan Trieschmann, Auteur ; Lars Banko, Auteur ; Markus Brochhagen, Auteur ; Rabea Schreckenberg, Auteur ; Christian Hopmann, Auteur ; Marc Böke, Auteur ; Jan Benedikt, Auteur ; Teresa de los Arcos, Auteur ; Guido Grundmeier, Auteur ; Dario Grochla, Auteur ; Alfred Ludwig, Auteur ; Thomas Mussenbrock, Auteur ; Ralf Peter Brinkmann, Auteur ; Peter Awakowicz, Auteur ; Rainer Dahlmann, Auteur Année de publication : 2019 Article en page(s) : p. 573-583 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Dépôt chimique en phase vapeur
Dioxyde de silicium
Revêtements
Simulation par ordinateur
Technique des plasmasIndex. décimale : 667.9 Revêtements et enduits Résumé : Plasma reactors for the application of silicon oxide coatings (SiOx) are often customized to optimize the processes regarding substrate properties and targeted functionalities. The design of these reactors is often based on qualitative considerations. This paper evaluates the use of a numerical, free simulation software for continuous mechanical problems (OpenFOAM) as a tool to evaluate reactor design options. As demonstrator for this purpose serves a given reactor for large-area pulsed microwave plasmas with a precursor inlet in the form of a shower ring. Previous results indicate that the shower ring may lead to an inhomogeneity in plasma and coatings properties along the substrate surface. Thus, a new precursor inlet design shall be developed. For this, the distribution of the process gases in the reactor for a variety of gas inlet designs and gas flows was simulated and a design chosen based on the results. The reactor was modified accordingly, and the simulations correlated with experimental results of plasma and coating properties. The results show that, despite many simplifications, a simulation of the neutral gas distribution using an open-access software can be a viable tool to support reactor and process design development. Note de contenu : - EXPERIMENTAL SECTION : Characterization methods, coatings, and initial plasma chamber - Initial plasma chamber - Electron density - Coating characteristics - Substrate
- RESULTS : Investigations on plasma and coating properties for square ring gas inlet - Numerical simulation - Plasma and coating characterization after simulation-based redesign - Electron densities - Stress measurements - Water vapor transmission rate (WVTR)
- DISCUSSIONDOI : 10.1007/s11998-018-0138-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0138-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32426
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 2 (03/2019) . - p. 573-583[article]Réservation
Réserver ce documentModel the media influence on plastics faster and easier / Felix Melzer in PLASTICS INSIGHTS, Vol. 113, N° 8 (2023)
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Titre : Model the media influence on plastics faster and easier : Design of plastic components Type de document : texte imprimé Auteurs : Felix Melzer, Auteur ; Christian Hopmann, Auteur ; Rainer Dahlmann, Auteur Année de publication : 2023 Article en page(s) : p. 94-96 Langues : Anglais (eng) Catégories : Caractérisation
Etalonnage
Fluage
Matières plastiques
PolycarbonatesIndex. décimale : 668.4 Plastiques, vinyles Résumé : Plastic components are often exposed to different media while in use. This can lead to a massive reduction of the mechanical properties. Previously, the investigation of these changes in mechanical properties via creep curves is associated with a high demand of time. In a recent research project at the IKV, a method was developed which helps to generate creep curves faster and with less testing effort. Note de contenu : - Optimized calibration of the material model
- Creeping of pc under influence of water
- Testing is possible also outside the medium
- Modelled and measured creep curves correspond well
- Fig. 1 : Schematic representation of the approach used for creep curve modelling : The time-temperature shift allows master curves to be generated. These can be used to extrapolate material behavior over the long term
- Fig. 2 : Elastic modulus of PC in water depending on temperature and strain rate: Higher temperatures lead to a reduced Young‘s modulus. It increases with increasing strain rate
- Fig. 3 : Shift of the sub curves and the fit of the corresponding master curve
- Fig. 4 : Comparison between modelled and measured creep curves of PC at a temperature of 60 °C and three different loads: The measured and modelled values agree wellEn ligne : https://drive.google.com/file/d/1DSwINkS4Nei1SOq894zfvjKBMUT3bN27/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40566
in PLASTICS INSIGHTS > Vol. 113, N° 8 (2023) . - p. 94-96[article]Réservation
Réserver ce documentPotential solutions for the industrialization of FRP / Rainer Dahlmann in KUNSTSTOFFE INTERNATIONAL, Vol. 103, N° 10 (10/2013)
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Titre : Potential solutions for the industrialization of FRP Type de document : texte imprimé Auteurs : Rainer Dahlmann, Auteur ; Kai Fischer, Auteur ; Christian Hopmann, Auteur ; Johannes Marder, Auteur Année de publication : 2013 Article en page(s) : p. 156-159 Langues : Anglais (eng) Catégories : Assurance qualité
Composites à fibres
Composites thermoplastiques
Construction -- Matériaux
Matériaux -- Allègement
Préformage
ThermodurcissablesIndex. décimale : 668.4 Plastiques, vinyles Résumé : Production technology and quality assurance. Driven by ever stricter legal and economic demands for efficient use of resources, lightweight construction represents a key technology for reducing the masses to be moved. The greatest potential for lightweight construction materials is offered by fiber-reinforced plastics (FRP) with the reinforcing fibers arranged appropriate to the loads. The integration of processing technologies with material technology, testing and material analysis is indispensable to achieve sustainable development. Note de contenu : - Generative preforming for thermoset and thermoplastic FRP
- Production of functionally integrated hollow articles with enless fiber reinforcement
- Improving the prediction accuracy
- Quality assurance for CRP partsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20300
in KUNSTSTOFFE INTERNATIONAL > Vol. 103, N° 10 (10/2013) . - p. 156-159[article]Réservation
Réserver ce documentProcess-optimized hybrid yarns for the fiber-spraying process / Christina Scheffler in TECHNICAL TEXTILES, Vol. 66, N° 1 (2023)
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Titre : Process-optimized hybrid yarns for the fiber-spraying process Type de document : texte imprimé Auteurs : Christina Scheffler, Auteur ; Janett Hiller, Auteur ; Matthias Krüger, Auteur ; Markus Stommel, Auteur ; Vera Austermann, Auteur ; Erik Wilms, Auteur ; Kai Fischer, Auteur ; Rainer Dahlmann, Auteur ; Christian Hopmann, Auteur Année de publication : 2023 Article en page(s) : p. 24-26 Note générale : Bibliogr. Langues : Multilingue (mul) Catégories : Composites à fibres de verre
Essais dynamiques
Fibres textiles -- Propriétés mécaniques
Filature
Polyamide 66
PréformesObjet constituant la majeur partie d’une pièce à fabriquer et qui nécessite un travail supplémentaire pour devenir une pièce finie. Ce terme s’utilise notamment pour le moulage, l’usinage, la taille d’outils en silex, la fabrication de fibre optique…
PulvérisationIndex. décimale : 677 Textiles Résumé : The aim of the research project "ProSize" was to identify and quantify the influences of hybrid yarn properties on the processability in the fiber¬spraying process, in order to develop online spun glass fiber/polyamide (GF/PA 66) hybrid yarns with adapted sizing formulations based on these findings. The collaboration of the IPF and the IKV enabled the development of hybrid yarns specifically designed for processing in the fiber-spraying process to reduce inhomogeneities of local weight/unit area and fiber orientation in the preform. Note de contenu : - Development of process-adapted coatings
- Processing of process-adapted hybrid yarns withthe fiber-spraying processEn ligne : https://drive.google.com/file/d/1C34WSlz7yT3utRswL0n0NV3YKTOrcWJx/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38922
in TECHNICAL TEXTILES > Vol. 66, N° 1 (2023) . - p. 24-26[article]Réservation
Réserver ce documentProcess-optimized hybrid yarns for the fiber-spraying process / Christina Scheffler in MAN-MADE FIBERS INTERNATIONAL, Vol. 73, N° 2 (2023)
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Titre : Process-optimized hybrid yarns for the fiber-spraying process Type de document : texte imprimé Auteurs : Christina Scheffler, Auteur ; Janett Hiller, Auteur ; Matthias Krüger, Auteur ; Markus Stommel, Auteur ; Vera Austermann, Auteur ; Erik Wilms, Auteur ; Kai Fischer, Auteur ; Rainer Dahlmann, Auteur ; Christian Hopmann, Auteur Année de publication : 2023 Article en page(s) : p. 38-40 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Essais dynamiques
Fibres de verre
Filature
Flexion (mécanique)
Matériaux hybrides
Mélanges de fibres
Polyamide 66
Pulvérisation
Traction (mécanique)Index. décimale : 677.4 Textiles artificiels Résumé : The aim of the research project "ProSize" was to identify and quantify the influences of hybrid yarn properties on the processability in the fiber-spraying process, in order to develop online spun glass fiber/polyamide (GF/PA 66) hybrid yarns with adapted sizing formulations based on these findings. The collaboration of the IPF and the IKV enabled the development of hybrid yarns specifically designed for processing in the fiber-spraying process to reduce inhomogeneities of local weight/unit area and fiber orientation in the preform. Note de contenu : - Development of process-adapted coatings
- Processing of process-adapted hybrid yarns with the fiber-spraying process
- Fig. 1 : Process control in the manu-facture of fiber-reinforced plastic components by fiber injection molding
- Fig. 2 : a. Simultaneous spinning of glass and thermoplastic filaments into hybrid yarns - b. Commingling of glass and thermoplastic filaments on the sizing roll - c. Results of transverse tensile testing on unidirectionally reinforced composite plates made from GF/PA 66 hybrid yarns with different sizing compared to commercial hybrid yarns (Benchmark 1 + 2)
- Fig. 3 : Comparison of fiber-sprayed preforms with commercial hybrid yarn an dprocess optimized yarn
- Fig. 4a : Comparison of flexural strengths for different hybrid yarns in 0° and 90° orientation
- Fig. 4b : Orthotropic valuesEn ligne : https://drive.google.com/file/d/1L9krlverRh4T4ih13q4eloyTGsG2d8Pf/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39490
in MAN-MADE FIBERS INTERNATIONAL > Vol. 73, N° 2 (2023) . - p. 38-40[article]Réservation
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