Technical University of Košice, Slovakia Department of Materials Science Materials Testing Physics of Metals Metals Science Heat Treatment of Metals Corrosion.

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Presentation transcript:

Technical University of Košice, Slovakia Department of Materials Science Materials Testing Physics of Metals Metals Science Heat Treatment of Metals Corrosion Science

Facilities Optical microscopes: Olympus, Leitz, Neophot with digital camera, sample preparation units of Struers and Leco Electron microscopes: –scanning EM Jeol JSM35CF with EDX analyser Link –transmission EM Jeol JEM 2000FX with EDX analyser Link 860 and EELS analyser Jeol Asea 10

We are looking for partners in reserach and applications of nanotechnologies, Fe nanoparticles, Sn nanowires

Research : general fields of present research: microstructure and properties of steels and non-ferrous metals corrosion science of metals development of testing methods of materials optimisation and application of heat treatment of metals electron microscopy and microanalyses of materials

Our reserach activities which come under themes of FP6 and FP7: nanoparticles: Fe nanospheroids and Fe nanowires, Sn nanowires (applied for project) ultrafine-grained materials (ECAP) nanoidentation testing of materials (applied for project) Cu based shape memory alloys

Fe nanoparticles Development of technologie for production of Fe spherical nanoparticels in dimension range from 10 to 200nm with small or no oxide layer on the surface. Idea of new technology is based on precipitation of iron from solid solutions with small or no solubility of Fe at room temperature. At present time we are able to produce small amounts of Fe particles with mean diameter in range nm. Also we are developing technology for changing shape of particles from spheroids to elipsoids.

Fe spheroids xxtracted from Cu-Fe alloy

Fe nanorods (nanowires ) produced by plastic deformation of spheroids

Fe nanowires discontinuously precipitated in Cu-Fe alloy

Fe nanowires after discontinuous precipitation in Cu-Fe alloy extracted to carbon replica

Applications of Fe nanoparticles? Medicin (cancer therapy) Magnetic media Magnetic liquids Fillers Catalyses etc.

Reserach on production of Sn nanowires The reserch is based on the same phenomenon of Sn whiskers formation as in cases of Pb free solders known in electrotechnics

Comparison of Sn nanowires with man hair

100 m Sn whisker- nanowire of total length 2,5mm

A few examples: in situ growth of whiskers- nano or micro wires on surface of metallographic polished sample in time range of few month