WIDE IRON-BASED AMORPHOUS ALLOY, PRECURSOR TO NANOCRYSTALLINE ALLOY

PROBLEM TO BE SOLVED: To provide a wide iron-based amorphous alloy, a precursor to a nanocrystalline alloy.SOLUTION: The wide iron-based soft magnetic alloy having a width greater than 63.5 mm and a thickness of 13 to 20 micron is provided. The wide iron-based soft magnetic alloy has a composition represented by the following formula: (FeM)CuSiBM'M"X, where M is Co and/or Ni, M' is at least one kind of element selected from Nb, W, Ta, Zr, Hf, Ti and Mo, M'' is at least one kind of element selected from V, Cr, Mn, Al, a platinum group element, Sc, Y, rare earth element, Au, Zn, Sn and Re, X is at least one kind of element selected from C, Ge, P, Ga, Sb, In, Be and As, a, x, y, z, p, q and r respectively satisfy 0≤a≤0.5, 0.1≤x≤3, 0≤y≤30, 1≤z≤25, 5≤y+z≤30, 0.1≤p≤30, q≤10 and r≤10. The alloy is at least 50% crystalline with an average particle size of 100 nm or less.SELECTED DRAWING: Figure 1 【課題】ナノ結晶合金の前駆体である広幅の鉄基非晶質合金。【解決手段】幅が６３．５ｍｍよりも広く、厚さが１３〜２０ミクロンの鉄基軟磁性合金。組成が（Ｆｅ１−ａＭａ）１００−ｘ−ｙ−ｚ−ｐ−ｑ−ｒＣｕｘＳｉｙＢｚＭ'ｐＭ"ｑＸｒであり、ＭはＣｏ及び／又はＮｉ、Ｍ'はＮｂ、Ｗ、Ｔａ、Ｚｒ、Ｈｆ、Ｔｉ及びＭｏから選択される少なくとも１種の元素、Ｍ"はＶ、Ｃｒ、Ｍｎ、Ａｌ、白金族元素、Ｓｃ、Ｙ、希土類元素、Ａｕ、Ｚｎ、Ｓｎ及びＲｅから選択される少なくとも１種の元素、ＸはＣ、Ｇｅ、Ｐ、Ｇａ、Ｓｂ、Ｉｎ、Ｂｅ及びＡｓから選択される少なくとも１種の元素、ａ、ｘ、ｙ、ｚ、ｐ、ｑ及びｒは、０≦ａ≦０．５、０．１≦ｘ≦３、０≦ｙ≦３０、１≦ｚ≦２５、５≦ｙ＋ｚ≦３０、０．１≦ｐ≦３０、ｑ≦１０、及びｒ≦１０をそれぞれ満たす。この合金は、平均粒径が１００ｎｍ以下の少なくとも５０％の結晶質である。【選択図】図１