Title:
SOFT MAGNETIC Co-BASED METALLIC GLASS ALLOY
Document Type and Number:
WIPO Patent Application WO/2003/085151
Kind Code:
A1
Abstract:
Conventional Co-Fe-B-Si metallic glasses have poor glass forming capability, so that metallic glass rods with a thickness of at least 1 mm cannot be fabricated and practical utility thereof is limited. The development of superior soft magnetic Co-Fe-B-Si metallic glass from which a bulk metallic glass can be obtained is the key to greatly widen the field of application of metallic glass products. A soft magnetic Co-based metallic glass alloy of high glass forming capability characterized by being represented by the following composition formula and exhibiting a supercooled liquid temperature gap (&Dgr Tχ) of 40 K or higher, a reduced vitrification temperature (Tg/Tm) of 0.59 and a coercive force of as low as 2.0 A/m or less. [Co1-n-(a+b)FenBaSib]100-χMχ wherein each of a, b and n represents an atomic ratio; 0.1 ≤ a ≤ 0.17; 0.06 ≤ b ≤ 0.15; 0.18 ≤ a+b ≤ 0.3; 0 ≤ n ≤ 0.08; M represents at least one element selected from among Zr, Nb, Ta, Hf, Mo, Ti, V, Cr, Pd and W; and 3 atomic% ≤ χ ≤ 10 atomic%.
Inventors:
INOUE AKIHISA (JP)
Application Number:
PCT/JP2003/004417
Publication Date:
October 16, 2003
Filing Date:
April 07, 2003
Export Citation:
Assignee:
JAPAN SCIENCE & TECH CORP (JP)
INOE AKIHISA (JP)
INOE AKIHISA (JP)
International Classes:
H01F1/153; C22C45/04; (IPC1-7): C22C45/04; C22C19/07
Foreign References:
| US20010031373A1 | 2001-10-18 | |||
| JPH07183113A | 1995-07-21 | |||
| JPH04143239A | 1992-05-18 |
Other References:
See also references of EP 1502968A4
Attorney, Agent or Firm:
Nishi, Yoshiyuki (Suite 211 26-32, Nakahara 4-chome, Isogo-k, Yokohama-shi Kanagawa, JP)
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