Metal treatment – Stock – Magnetic
Reexamination Certificate
2006-11-28
2006-11-28
Wyszomierski, George (Department: 1742)
Metal treatment
Stock
Magnetic
C148S311000, C148S313000
Reexamination Certificate
active
07141127
ABSTRACT:
A low core loss magnetic alloy with a high saturation magnetic flux density, which has a composition represented by the general formula:in-line-formulae description="In-line Formulae" end="lead"?(Fel-aCoa)100-y-cM′yX′c(atomic %)in-line-formulae description="In-line Formulae" end="tail"?where M′ represents at least one element selected from V, Ti, Zr, Nb, Mo, Hf, Ta, and W, X′ represents Si and B, an Si content (atomic %) is smaller than a B content (atomic %), the B content is from 4 to 12 atomic %, and the Si content is from 0.01 to 5 atomic %, a, y, and c satisfy respectively 0.2<a<0.6, 6.5≦y≦15, 2≦c≦15, and 7≦(y+c)≦20, at least a part of an alloy structure being occupied by crystal grains having grain size of not larger than 50 nm, a saturation magnetic flux density Bsbeing not less than 1.65 T, and a core loss Pcmper unit volume in conditions at 80° C., f=20 kHz, and Bm=0.2 T being not more than 15 W/kg.
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Hitachi Metals Ltd.
Wyszomierski George
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