In Situ Formed Permanent Magnet Cu/Fe Multifilamentary Composites

Copper/30 vol.-% Fe multifilamentary composites were produced in situ . Magnetic hysteresis loops of wire and tape composites were obtained at room temp. as a function of both cross-sectional area reduction, up to 99.9996%, and annealing conditions. H sub ci and (BH ) sub max. increase with cross-sectional area reduction, reaching 250 Oe and 0.46 MG Oe, respectively, in the most heavily deformed unannealed samples. On proper annealing, H sub ci and (BH ) sub max. increase dramatically, up to 590 Oe and 1.35 MG Oe, respectively. Considering the simple preparation technique and inexpensive constituent elements, the in situ formed Cu/Fe composites appear to have the potential for permanent magnet applications. 9 ref.--AA