Institut für Werkstoffwissenschaften und -technologien
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106 Submissions in this community.

Recent Submissions
X-ray radiographic and tomographic investigations of cycled lithium ion batteries

Sun, Fu (2017)

Lithium ion batteries (LIBs) have become the predominant power supplies in portable electronic devices such as cell phones, laptops and tablets. They are regarded as promising candidates to power f...

Alterung und Lebensdauervorhersage von O-Ring-Dichtungen

Kömmling, Anja (2017)

In some applications, elastomer seals have to remain leak tight over extended time periods (up to several decades) as an exchange of the seals is not practical. Therefore, it is necessary to be abl...

Charakterisierung von Glas-Polymer Verbundmaterialien für die Hochdruckspeicherung von Wasserstoff

Prewitz, Marc (2017)

This thesis investigates glass capillaries and structures consisting of borosilicate glass (Simax) for high pressure hydrogen storage. The finite element method (FEM) is used for the mechanical ana...

Flame retardant materials based on BDM/DBA resin and organic-inorganic additives

Wang, Zheng (2017)

2,2’-diallyl bisphenol A (DBA) modified bismaleimide resins (BDM) are widely used as polymer matrix of high-performance composites in the field of aerospace, transportation, machinery, and electron...

Formation of intermetallic phases in Al-10Si-0.3Fe based alloys

Yu, Jiamin (2016)

The emphasis of the work lies on finding out how impurities and the addition of Sr influence the formation of Fe-rich intermetallic phases and the formation of the eutectic Si phase in Al-Si castin...

Analysis of poly(L-lactide) nanocomposites based on layered double hydroxides

Leng, Jing (2016)

This work focuses on the analysis of the poly (L-lactide) nanocomposites based on modified MgAl and NiAl layered double hydroxides (LDH) characterized by measurements such as size exclusion chromat...

Characterization of epoxy/copper interphases using nanoindentation

Elabshihy, Karim (2016)

Characterization of the size and mechanical properties of interphases is essential when designing multicomponent materials. Polymer/metal composites, often found in microelectronics, are an example...

Untersuchungen zur Photo-Degradation von Kohlenstoff-Nanoröhren-gefüllten Polymerkompositen

Barthel, Anne-Kathrin (2016)

Durch eine Additivierung von Kunststoffen mit Kohlenstoff-Nanoröhren (CNT) lassen sich ihre Eigenschaften gezielt optimieren. Die erzielten Leistungsverbesserungen können über steigende Nachfrage z...

Untersuchungen zur Spanbildung metallischer Werkstoffe anhand von in situ Röntgenbeugungsexperimenten

Brömmelhoff, Katrin Stefanie (2016)

Zur Optimierung der Zerspanprozesse mit geometrisch bestimmter Schneide ist ein fundiertes Wissen über den Spanbildungsprozess notwendig, welches jedoch aufgrund der erschwerten messtechnischen Erf...

Assessing microstrain in polycrystalline thin films by means of various diffraction and spectroscopy techniques

Schäfer, Norbert (2016)

Die vorliegende Arbeit behandelt die Möglichkeit von Dehnungsmessungen innerhalb einzelner Körner der CuInSe2-Absorberschicht einer Dünnschichtsolarzelle. Ausgedehnte strukturelle Defekte und deren...

Friction in long bearing channels during multi-hole extrusion of aluminum alloy

Sanabria Rosas, Vidal R. (2016)

The friction behavior between the aluminum alloy EN AW-6060 and the hot working steel AISI H13 was investigated under extrusion conditions. The visco-plastic response of the EN AW-6060 was determin...

Particle-stabilised foams: structure and aging

Stocco, Antonio; Garcia-Moreno, Francisco; Manke, Ingo; Banhart, John; Langevin, Dominique (2011)

We show that aqueous foams stabilised by nanoparticles can be easily imaged using an X-ray laboratory source. We have used hydrophobically modified silica nanoparticles that confer to the foam a re...

Kinetics of coalescence in liquid aluminium foams

Garcia-Moreno, Francisco; Solorzano, E.; Banhart, Jon (2011)

The cell wall rupture kinetics for a collection of AlSi9 foam samples kept at a constant temperature over the melting point for a long time period (700 s) has been characterized by in situ X-ray ra...

The rupture of a single liquid aluminium alloy film

Heim, K.; Garcia-Moreno, F.; Kumar, G. S. Vinod; Rack, A.; Banhart, J. (2014)

The present study is based on the idea of understanding the rupture of films in metal foams by studying free standing metallic films as a model system. Liquid dynamics, the velocity of the rupturin...

On the structural integrity and electrochemical activity of a 0.5Li(2)MnO(3)center dot 0.5LiCoO(2) cathode material for lithium-ion batteries

Rana, Jatinkumar; Klöpsch, Richard; Li, Jie; Scherb, Tobias; Schumacher, Gerhard; Winter, Martin; Banhart, John (2014)

Structural changes in a 0.5Li2MnO3·0.5LiCoO2cathode material were investigated by X-ray absorption spectroscopy. It is observed that both Li2MnO3and LiCoO2components of the material exist as separa...

Enhanced catalytic performance of MnxOy-Na2WO4/SiO2 for the oxidative coupling of methane using an ordered mesoporous silica support

Yildiz, M.; Aksu, Y.; Simon, U.; Kailasam, K.; Görke, O.; Rosowski, F.; Schomäcker, R.; Thomas, A.; Arndt, S. (2014)

The oxidative coupling of methane is a highly promising reaction for its direct conversion. Silica supported MnxOy–Na2WO4 is a suitable catalyst for this reaction. In this study, a variety of diffe...

Verarbeitung von langglasfaserverstärkten Thermoplasten für Spritzgussanwendungen auf dem Planetwalzenextruder

Birr, Thomas (2016)

Die Thematik, polymere Werkstoffe als Substituenten von Metallen für die Herstellung mechanisch beanspruchter Bauteile und Strukturen einzusetzen, ist aktueller denn je. Dabei spielen in der indust...

Mechanische Eigenschaften und Versagensmechanismen offenzelliger Aluminiumschaum-Strukturen

Schüler, Paul (2016)

In the context of the development of new and innovative concepts for lightweight design, metal foams have awakened the interest of research institutes and industry for some considerable amount of t...

Einfluss verschiedener Legierungselemente auf Mikrostruktur und Werkstoffeigenschaften von Al-Li-Legierungen

Schlingmann, Tina (2016)

The continuous demand of the aerospace industry for structural components with increased power-to-weight ratio has promoted the Al-Li-alloys to the center of attention for metallic development, on ...

Precipitation during continuous casting

Muller, Charles-Edouard (2015)

This work deals with the risk of surface cracking during continuous casting of thick slabs. While surface cracks are traditionally related to losses in ductility and reduction of area, the current ...