Fe BASED NANOCRYSTAL SOFT MAGNETIC ALLOY, AMORPHOUS ALLOY THIN STRIP, METHOD FOR PRODUCING Fe BASED NANOCRYSTAL SOFT MAGNETIC ALLOY, AND MAGNETIC COMPONENT

摘要

PROBLEM TO BE SOLVED: To provide an Fe based nanocrystal soft magnetic alloy having high saturation magnetic flux density and low magnetostriction, and particularly suitable for a cut core, to provide an amorphous alloy thin strip used for producing the Fe based nanocrystal soft magnetic alloy, to provide a method for producing the Fe based nanocrystal soft magnetic alloy, and to provide a high performance magnetic component using the same.;SOLUTION: The high Bs-low magnetic strain Fe based nanocrystal soft magnetic alloy has a composition expressed by general formula: Fe_100-x-y-zAxMaSiyBz (atomic%); wherein, A denotes at least one kind of element selected from Cu and Au; M denotes at least one kind of element selected from Ti, V, Zr, Nb, Mo, Hf, Ta and W; and (x),(y),(a) and (z) satisfy 0≤x≤2, 13≤y≤18, 0≤a≤1.5, 4≤z≤10, and x+y+a+z≤25, respectively, and is composed of bcc Fe-Si crystal grains with the average grain diameter of ≤120 nm and an amorphous phase, and in which the bcc Fe-Si crystal grains occupy ≥50% of the structure by volume fraction, saturated magnetic flux density Bs satisfies ≥1.4T, and a saturation magnetostriction constant λs lies in the range of -3.5×10^-6 to +3.5×10^-6.;COPYRIGHT: (C)2008,JPO&INPIT