Magnetic alloy with ultrafine crystal grains and method of...

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75/14, 248/7, 14

H01F 1/047 (2006.01) C21D 1/04 (2006.01) C22C 33/00 (2006.01) C22C 38/00 (2006.01) C22C 45/02 (2006.01) H01F 1/147 (2006.01) H01F 1/153 (2006.01) H01F 41/02 (2006.01)

Patent

CA 2030446

Disclosed is a magnetic alloy with ultrafine crystal grains having a composition represented by the general formula: Fe100-x-y M x B y (atomic %) wherein M represents at least one element selected from Ti, Zr, Hf, V, Nb, Mo, Ta, Cr, W and Mn, 4 ~ x ~ 15, 2 ~ y ~ 25, and 7 ~ x + y ~ 35, at least 50% of the alloy structure being composed of crystal grains having an average grain size of 500.ANG. or less, and the crystal grains being based on a bcc structure. It may further contain X (Si, Ge, P, Ga, etc.) and/or T (Au, Co, Ni, etc.). This magnetic alloy has an excellent saturation magnetic flux density, permeability and heat resistance.

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