Abstract
Metal amorphous nanocomposite alloys, with compositions (Fe70Ni30)80-xNb4Si2B14TEx (0 ≤ x ≤ 5), where TE is a transition element, and (Fe70Ni30)80-yNb4+ySi2B14 (0.5 ≤ y ≤ 2) were synthesized. Samples were annealed at 440 °C and strain-annealed at 440 °C and 300 MPa. Resistivity was found to increase with small substitutions of TE elements. Increasing V resulted in reduced Bs from 1.2 T to 0.5 T. Further Mo additions lowered Bs to 0.6 T, and consistently reduced the permeability. For Cr and Nb, resistivity increased, and strain-annealed permeability was lower than the annealed permeability. Lastly, toroidal core losses on (Fe70Ni30)79.5Nb4Si2B14V1 yielded W1.0/400 = 2.1 W/kg, and W1.0/1 k = 6.0 W/kg.
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