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F07: Materials with morphologically imprinted transformations

Belongs to:
TopicF: Functional Materials, Surfaces, and Devices

In the wide range of exothermic phase formations between metals or between metals and non-metals, the so-called self-propagating reactions take a special position. Their outstanding feature is the capability to release heat of reaction on a temporal and spatial scale that allows them to sustain and propagate the reaction after a local ignition. As the reaction is governed by heat and mass transport, the geometrical (morphological) arrangement of reactants plays a crucial role for its properties and transformation. The use of different morphologies like nanolayers or nanopowders is reported. However, a broader perspective of morphology appears necessary, for which the concept of “morphological signature”, which is seen as the entity of all geometrical, chemical and microstructural characteristics of the material at the macro, micro, nano and atomic level becomes important. Some progress on selected predesigned morphologies has been reported, e.g. in reactive nanofoils, but a general fundamental understanding for a broad variety of morphologies is lacking. Consequently, the full technological potential of complex tailored morphologies is yet to be explored, which represents the leading and central aim of the symposium.

The symposium should bringing together scientist and experts from simulation, physical metallurgy, thin film deposition technology, structuring, microstructure analysis and joining technology. Application can be in reactive joining on micro- and macro-scale or in joining dissimilar materials, even self-repairing or self-protecting devices, auto-disassembly and recycling. The visions are materials that transform from a pre-designed morphology and microstructure into a desired state with desired functional properties through an morphologically predesigned transformation. Thus, all key aspects of self-propagating reactions and imprinted transformations should be combined and applications discussed.