17. Festkörpertag am 29. Januar 2016 – ein Rückblick
Am 29. Januar fand der "ZFM-Festkörpertag 2016" statt, die mittlerweile 17. Veranstaltung dieser Art. Wie üblich gab es fünf einstündige Fachvorträge von Rednerinnen und Rednern aus dem In- und Ausland. Die Gäste konnten die Vorträge wieder im Dr.-Oetker-Hörsaal des Instituts für Physikalische Chemie und Elektrochemie verfolgen, nachdem die Sanierung des Institutsgebäudes im Vorjahr abgeschlossen worden war.
Übersicht: das Vortragsprogramm
- Tom Willhammar – "Electron Crystallography: A Voyage into the World of Zeolite and MOF Structures"
- Anke Blume – "Can Rubber and Thermoplasts Help Against the Greenhouse Effect?"
- Thomas Niendorf – "Additive manufacturing – Microstructure design and mechanical properties"
- Martin Schmücker – "Material Issues for Concentrated Solar Power (CSP)"
- Jürgen Janek – "'Solidifying' Batteries – Solid Electrolytes in Lithium (Ion) Batteries"
Dr. Tom Willhammar, EMAT, University of Antwerp, Belgium:
"Electron Crystallography: A Voyage into the World of Zeolite and MOF Structures"
Zeolites and related materials often possess complex and intriguing atomic structures. Knowledge about these structures is essential for understanding its properties and how we can take advantage of them in new applications. Electron crystallography has several advantages over X-ray based method for structure determination. With electron crystallography it is possible to study crystals that are several orders of magnitude smaller than what can be studied by X-ray diffraction. Electron crystallography is a unique tool for characterization of crystalline materials suffering from small crystal size and complex or disordered structures. In this talk I will describe how we can use these tools for structure determination of zeolites and MOFs with complex structures.
- Weblink: Tom Willhammar
Prof. Dr. Anke Blume, Elastomer Technology and Engineering, University of Twente, Netherlands:
"Can Rubber and Thermoplasts Help Against the Greenhouse Effect?"
Car traffic has a significant share in worldwide greenhouse gas emissions. Despite many improvements in the past there is still a big potential for further reductions of the CO2 emissions. Many parts of a car can be replaced by thermoplasts or elastomers in order to reduce weight. In addition all tire producers are working on solutions to decrease the CO2 emissions, e.g. by reducing the rolling resistance. One important aspect in both areas – at least in the long term – will be the use of bio-based products.
- Weblink: Anke Blume
Prof. Dr.-Ing. Thomas Niendorf, Institut für Werkstofftechnik, Universität Kassel, Germany:
"Additive manufacturing – Microstructure design and mechanical properties"
Additive manufacturing of metallic components allows for production of parts showing unprecedented design freedom. Based solely on data from computer aided design, parts are build layer by layer using techniques such as selective laser melting or selective electron beam melting. Due to rapid solidification from the small melt pool, microstructures can differ significantly from conventionally processed counterparts. The current paper reviews data focusing on process-microstructure-property relationships in additively manufactured alloys. It is shown that anisotropy, porosity and residual stresses are key factors for evaluation of mechanical performance. Post treatments for optimization are introduced. Finally, pathways towards the development of new materials by additive manufacturing are highlighted.
- Weblink: Thomas Niendorf
Prof. Dr. Martin Schmücker, German Aerospace Center (DLR), Cologne, Germany:
"Material Issues for Concentrated Solar Power (CSP)"
By concentrated solar radiation thermal energy can be obtained to be used for power generation or for thermal process engineering to produce e.g. "solar fuels". However, there is still a number of material issues to be resolved: Specific functional demands (e.g. high reflectivity for mirrors, high absorptivity for solar receivers, or suitable reactivity for thermochemical heat storage or thermochemical fuel production) must be fulfilled. Moreover, long-term stability under cyclic thermal load and harsh environmental conditions is required. Material issues, such as degradation of SiC absorbers under desert conditions and requirements for cyclic thermochemical processes are discussed in detail.
- Weblink: Martin Schmücker
Prof. Dr. Jürgen Janek, Institute of Physical Chemistry, Justus Liebig University Giessen, Germany:
"'Solidifying' Batteries – Solid Electrolytes in Lithium (Ion) Batteries"
Solid electrolytes and solid state batteries are attracting serious interest as potential future components and storage devices. Solid electrolytes (polymer, ceramic or composites) are required to construct protected lithium anodes – in case that lithium metal anodes will become again part of lithium batteries. Batteries without any liquid electrolytes are considered as ultimately stable and safe devices, but are expected to suffer from poor kinetics and high costs. I will discuss: Are solid electrolytes necessarily worse lithium ion conductors than liquid electrolytes? Are solid electrolytes the key to ultimately long-term stable batteries? What do we know about the interface between liquid and solid electrolytes? How to construct “thick film” solid state batteries? Important research tasks in the development of solid state batteries?
- Weblink: Jürgen Janek
Porträtbilder der Referentinnen und Referenten: privat
Übrige Bilder: Christian Schröder