Abstract
The Mg micropowders were atomised with argon. Various ceramic and carbon nanoparticles were generated by laser-induced gas phase reaction in a flow reactor. The Mg powders were mixed or ball milled with nanoscaled particles and hot extruded. The deformation behaviour of the nanocomposites was investigated by tensile or compression tests at different temperatures at a constant initial strain rate. The test temperature significantly influences the flow stress. The damping was measured as the logarithmic decrement of the free decay of the vibrating beam of the composite. The volume fraction and the kind of the reinforcement influence the value of the logarithmic decrement and its strain amplitude dependence. A high damping is observed.

Key words
magnesium, composites, mechanical properties, damping

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