Papers by Keyword: Macrocomposite

Abstract: New bimetal magnesium/aluminium macrocomposites containing millimeter-scale Al based core reinforcement were fabricated using solidification processing followed by hot coextrusion. The initial macrocomposite consisted of a combination of pure Mg shell and pure Al core. Some problems encountered with the macrocomposite were Mg and Al grain coarsening, an inadequate Mg-Al interface (macrointerface) and consequent reduction in strength, compared to monolithic Mg. To rectify these problems, three approaches were taken in the following order primarily to widen (strengthen) the Mg-Al interface: (a) pouring of pure Al at 900°C (higher temperature approach), (b) pure Mg shell substitution with AZ31 shell (single substitution approach) and (c) pure Mg shell and pure Al core substitution with AZ31 shell and AA5052 core, respectively (double substitution approach). The evolution (strengthening) of the Mg-Al interface and its effect on microstructure and mechanical properties in each macrocomposite is investigated in this paper.

Abstract: The multilayer construction of metal-matrix Cu-Nb microcomposite wire wound Zylon-epoxy composite reinforced inductor is analyzed. Inductor geometry was verified analytically to find the maximal available value of a magnetic field. For comparison, the soft copper wire wound inductor was made by the same geometry and technology and both inductors were investigated at room and liquid nitrogen temperatures. Experimental results were compared with calculated data. The acceptable agreement of calculated and measured data for soft copper wire wound inductor and the significant decrease of amplitude and distortions of sinus shape pulse due to weak heat dissipation of metal-matrix Cu-Nb wire wound inductor took place.