Congress contributions

Dittrich, Lars; Endrödy, Csaba; Hoffmann, Martin;
Design and technology concept for a novel micropump coping without moving mechanical components. - In: 23rd Micromechanics and Microsystems Europe Workshop, (2012), insges. 4 S.

Geiling, Thomas; Leopold, Steffen; Cheriguen, Yahia; Hoffmann, Martin
Fine dust measurement with electrical fields concept for a capacitive setup. - In: 23rd Micromechanics and Microsystems Europe Workshop, (2012), insges. 4 S.

Goj, Boris; Hoffmann, Martin;
Design of a biaxial nanoprobe utilizing Matlab Simulink. - In: 23rd Micromechanics and Microsystems Europe Workshop, (2012), insges. 4 S.

Hebel, Robert; Dittrich, Lars; Hoffmann, Martin;
On the influence of laser cutting manufacturing tolerances on the spring rate of machined tubular springs. - In: 23rd Micromechanics and Microsystems Europe Workshop, (2012), insges. 4 S.

Schmidt, Denny; Albrecht, Robert; Lange, Günther
Investigation to distribution of additives in open- and closed-cell aluminum foam. - In: Proceedings of International Conference on Innovative Technologies, IN-TECH 2012, Rijeka, Croatia, 26. - 28.09.2012, ISBN 978-953-6326-77-8, (2012), S. 533-537

New fields of applications can be developed with the porous structure of cellular materials. In addition to polymer and ceramic foams, especially cellular metallic materials, metal foams, are in our focus of research. Its porous structure allows us to achieve low specific densities. Metal foams can be used as a high energy absorption material particularly for lightweight applications. The production of closed-cell and open-cell metal foams is done by melting or powder metallurgy processes. In practice, primarily aluminum-based foam materials find their application in small series. The reproducibility of mechanical and functional properties needs a homogeneous pore distribution. The cost-intensive production process of the open-cell metal foams gives a more homogeneous structure than closed-cell metal foams. During the foaming process of powder metallurgy foams, a variety of parameters have an influence on the pore distribution. In addition to the temperature regime, especially the alloy components and additives are important. Above all, the structure-property-relationship of cellular materials is most significant. In this paper, micro- and macro-structures of closed-cell aluminum foams are analyzed and compared as well as the additive distribution in the material (such as titanium from the foaming agent TiH2). The goal is to analyze the distribution of the alloy components in the foaming process for a systematic optimization of the manufacturing process in terms of powder composition, powder sizes, compaction ratio, heat treatments and temperature regime.