Tohoku University

Tokin Corporation

Nec Tokin Corporation

Tohoku Magnet Institute Co., Ltd.

Yasunobu Yamada

Akiri Urata

Hiroyuki Matsumoto

Akihiro Makino

Shigeyoshi Yoshida

Akihisa Inoue

Teruhiko Fujiwara

An amorphous soft magnetic alloy of the formula (FeTM)PBLSiTiCMnCu, wherein TM is Co or Ni; L is Al, Cr, Zr, Mo or Nb; 0&#x2264;&#x3b1;&#x2264;0.3, 2&#x2264;w&#x2264;18 at %, 2&#x2264;x&#x2264;18 at %, 15&#x2264;w+x&#x2264;23 at %, 1&#x3c;y&#x2264;5 at %, 0&#x2264;z&#x2264;4 at %; p, q, r, and s represents an addition ratio such that the total mass of Fe, TM, P, B, L and Si is 100, and 0&#x2264;p&#x2264;0.3, 0&#x2264;q&#x2264;0.5, 0&#x2264;r&#x2264;2, 0&#x2264;s&#x2264;1 and r+s&#x3e;0; the composition fulfills one of the following conditions: L is Cr, Zr, Mo or Nb; or L is a combination of Al and Cr, Zr, Mo or Nb, wherein 0&#x3c;Al&#x2264;5 at %, 1&#x2264;Cr&#x2264;4 at %, 0&#x3c;Zr&#x2264;5 at %, 2&#x2264;Mo&#x2264;5 at %, and 2&#x2264;Nb&#x2264;5 at %; the alloy has a crystallization start temperature (Tx) which is 550&#xb0; C. or less, a glass transition temperature (Tg) which is 520&#xb0; C. or less, and a supercooled liquid region represented by &#x394;Tx=Tx&#x2212;Tg, which is 20&#xb0; C. or more.

Amorphous soft magnetic alloy and inductance component using the same

An Fe-based nano-crystalline alloy formed from an alloy composition of (FeE)BPCuhaving an amorphous phase as a main phase, wherein 79&#x2266;100-X-Y-Z&#x2266;86 atomic %, 4&#x2266;X&#x2266;9 atomic %, 1&#x2266;Y&#x2266;10 atomic %, and 0.5&#x2266;Z&#x3c;1.2 atomic %, and wherein (FeE) includes Fe and at least one element selected from the group consisting of Ti, Zr, Hf, Nb, Ta, Mo, W, Cr, Al, Mn, Ag, Zn, Sn, As, Sb, Bi, Y, N, O and a rare-earth element, wherein a combined total of said at least one element selected from the group consisting of Ti, Zr, Hf, Nb, Ta, Mo, W, Cr, Al, Mn, Ag, Zn, Sn, As, Sb, Bi, Y, N, O and a rare-earth element is in an amount of 3 atomic % or less relative to the whole composition.

Fe-based nano-crystalline alloy

An alloy composition of FeBPCu, where 4&#x2266;X&#x2266;14 atomic %, 0&#x3c;Y&#x2266;10 atomic %, and 0.5&#x2266;Z&#x2266;2 atomic %. This alloy composition has an amorphous phase as a main phase. This alloy composition is used as a starting material and exposed to a heat-treatment so that nanocrystals comprising no more than 25 nm of bccFe can be crystallized. Thus, an Fe-based nano-crystalline alloy having superior magnetic properties can be obtained.

Alloy composition, Fe-based nano-crystalline alloy and forming method of the same

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Sendai, Japan

Yasunobu Yamada