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Nachhaltig Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen IPH Teisnach

Zeitschriftenartikel

Armin Reif, P. Rinck, Sebastian Sitzberger, Rolf Rascher, M. Zäh

Zerspanung von Hochleistungswerkstoffen mit ultrasonisch modulierter Schnittgeschwindigkeit

ZWF - Zeitschrift für wirtschaftlichen Fabrikbetrieb, vol. 115, no. 3, pp. 2-5

2020

DOI: 10.3139/104.112255

Abstract anzeigen

Die steigenden Anforderungen an die Festigkeit und die Qualität von Bauteilen und die damit verbundene Verwendung hochfester Materialien erfordert die Weiterentwicklung neuer wirtschaftlicher Zerspanungstechniken. Durch eine werkzeugseitige Schwingungsüberlagerung können bei der Bearbeitung von schwer zerspanbaren Werkstoffen die Zerspankräfte und der Werkzeugverschleiß reduziert sowie die Oberflächenqualität verbessert werden.

Nachhaltig Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen

Vortrag

David Scholz, Thomas Stirner

Hartree-Fock simulation of hematite surfaces with a posteriori calculation of correlation energy

Preisträgervortrag zur Verleihung des Georg-Simon-Ohm-Preises der Deutschen Physikalischen Gesellschaft an David Scholz

DPG-Frühjahrstagung, Dresden (abgesagt wegen Covid-19, gehalten an THD), Dresden

2020

Nachhaltig Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen

Zeitschriftenartikel

Thomas Stirner, David Scholz, J. Sun

Convergence of surface energy calculations for various methods: (001), (012), (100) hematite and the applicability of the standard approach

Journal of Physics: Condensed Matter, vol. 32, no. 18

2020

DOI: 10.1088/1361-648X/ab6f88

Abstract anzeigen

Three different methods for the calculation of the surface energy, namely the standard approach, the Boettger relation and the linear-fit method, are applied to the (0 0 1), (0 1 2) and (1 0 0) hematite surfaces. The standard approach was previously shown to suffer from a divergence problem, and the Boettger relation was shown to exhibit quantum size effects. While the linear-fit method, in general, leads to a good convergence behavior of the surface energy, the questions arise whether the relative order of the calculated surface energies depends on the chosen calculation method, and whether there is any merit at all in employing the standard approach. The present work investigates these questions with hematite as a benchmark material system. The simulations show that, for the surface facets and slab thicknesses studied here, the relative order of the surface energies is unaffected by the chosen calculation method. A regime is found where the three methods are in reasonably good agreement with respect to the obtained surface energies. Finally, a procedure is put forward to extract meaningful surface energy values from the standard approach.

Nachhaltig Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen IPH Teisnach

Patent

Sebastian Sitzberger

Fixiervorrichtung

2019

Nachhaltig Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen IPH Teisnach

Patent

Christian J. Trum, Sebastian Sitzberger

Akkubetriebene Ultraschall-Handbohrmaschine sowie Verfahren zum Betreiben einer solchen Ultraschall-Handbohrmaschine

2019

Nachhaltig Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen IPH Teisnach

Patent

Sebastian Sitzberger, Christian J. Trum, Michael Benisch

Ultraschall-Handbohrmaschine und Verfahren zum Betreiben einer Ultraschall-Handbohrmaschine

2019

Nachhaltig Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen IPH Teisnach

Vortrag

Simon Killinger, Alexander Haberl, Rolf Rascher

Analysis of residual errors during computer controlled polishing

EOS Optical Technologies: Conference on Manufacturing, Tolerancing and Testing of Optical Systems (MOS) – Session 7: Plenary Session, München

2019

Abstract anzeigen

In computer controlled subapertur polishing the formation of mid spatial frequency errors (MSFE) needs special attention. In this work the formation of MSFE in feed direction is investigated using the ADAPT tool from Satisloh.

Nachhaltig Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen IPH Teisnach

Vortrag

Sebastian Sitzberger, P. Rinck, A. Gueray, Rolf Rascher

Ultraschallunterstützte Zerspanung von Advanced Materials

3. Wissenschaftliches Forum zur ULTRASONIC-Bearbeitung, Jena

2019

Nachhaltig Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen IPH Teisnach

Vortrag

Sebastian Sitzberger, J. Reitberger, Rolf Rascher

Clamping system for optical components for adaptation in optical production

10th HLEM 2019 - High Level Expert Meeting Asphere Metrology on Joint Investigations, Braunschweig

2019

Nachhaltig Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen TAZ Spiegelau

Zeitschriftenartikel

Benedikt Scharfe, S. Lehmann, Thorsten Gerdes, D. Brüggemann

Optical and Mechanical Properties of Highly Transparent Glass-Flake Composites

Journal of Composites Science, vol. 3, no. 101, pp. 1-17

2019

DOI: 10.3390/jcs3040101

Abstract anzeigen

In this paper, the dynamic mechanic and optical properties of composites made of Polyvinyl Butyral (PVB) and Micro Glass Flakes (MGF) with matching refractive indices (RIs) are investigated. The composite is produced by a slurry-based process using additional blade casting and lamination. It can be shown that a high degree of ordering of the MGF in the polymer matrix can be achieved with this method. This ordering, combined with the platelet-like structure of the MGF, leads to very efficient strengthening of the PVB with increasing content of the MGF. By carefully adjusting the RIs of the polymer, it is shown that haze is reduced to below 2%, which has not been achieved with irregular fillers or glass fibers.

Nachhaltig Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen TAZ Spiegelau

Zeitschriftenartikel

L. Schwinger, S. Lehmann, L. Zielbauer, Benedikt Scharfe, Thorsten Gerdes

Aluminum Coated Micro Glass Spheres to Increase the Infrared Reflectance

Coatings (Special Issue "Current Research in Thin Film Deposition: Applications, Theory, Processing, and Characterisation"), vol. 9, no. 3

2019

DOI: 10.3390/coatings9030187

Abstract anzeigen

The reflective properties of micro glass spheres (MGS) such as Solid Micro Glass Spheres (SMGS, “glass beads”) and Micro Hollow Glass Spheres (MHGS, “glass bubbles”) are utilized in various applications, for example, as retro-reflector for traffic road stripe paints or facade paints. The reflection behavior of the spheres can be further adapted by coating the surfaces of the spheres, e.g., by titanium dioxide or a metallic coating. Such coated spheres can be employed as, e.g., mid infrared (MIR)-reflective additives in wall paints to increase the thermal comfort in rooms. As a result, the demand of heating energy can be reduced. In this paper, the increase of the MIR-reflectance by applying an aluminum coating on MGS is discussed. Aluminum coatings are normally produced via the well-known Physical Vapor Deposition (PVD) or Chemical Vapor Deposition (CVD). In our work, the Liquid Phase Deposition (LPD) method, as a new, non-vacuum method for aluminum coating on spherical spheres, is investigated as an alternative, scalable, and simple coating process. The LPD-coating is characterized by X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), and reflection measurements. The results are compared to a reference PVD-coating. It is shown that both sphere types, SMGS and MHGS, can be homogeneously coated with metallic aluminum using the LPD method but the surface morphology plays an important role concerning the reflection properties. With the SMGS, a smooth surface morphology and a reflectance increase to a value of 30% can be obtained. Due to a structured surface morphology, a reflection of only 5% could be achieved with the MHGS. However, post-treatments showed that a further increase is possible.

Nachhaltig Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen TC Teisnach Sensorik

Vortrag

Alois Kasberger, Raimund Förg

Heißprägen von Glassubstraten als Basis kapazitiver Ultraschall-Sensorik

2. Technologietag Angewandte Sensorik (TAS), Coburg

2019

Nachhaltig Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen TAZ Spiegelau

Vortrag

Harald Zimmermann

The Usage of AI for Glass Process Optimization

Şişecam International Glass Conference, Istanbul, Türkei

2019