Soft magnetic properties of ring shape bulk glassy Fe-Al-Ga-P-C-B-Si alloyprepared by copper mold casting

Citation
T. Mizushima et al., Soft magnetic properties of ring shape bulk glassy Fe-Al-Ga-P-C-B-Si alloyprepared by copper mold casting, MATER T JIM, 40(9), 1999, pp. 1019-1022
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Metallurgy
Journal title
MATERIALS TRANSACTIONS JIM
ISSN journal
0916-1821 → ACNP
Volume
40
Issue
9
Year of publication
1999
Pages
1019 - 1022
Database
ISI
SICI code
0916-1821(199909)40:9<1019:SMPORS>2.0.ZU;2-H
Abstract
Structural and soft magnetic properties were investigated for a bulk glassy Fe70Al5Ga2P9.65C5.75B4.6Si3 alloy in a ring shape form with an outer diame ter of 10 mm, an inner diameter of 6 mm and a thickness of 1 mm prepared by copper mold casting. The bulk sample composes of an amorphous single phase . The supercooled liquid region (Delta T-x) defined by the difference betwe en the crystallization temperature (T-x) and glass transition temperature ( T-g) for the bulk glassy alloy is about 60 K, being in agreement with that of the corresponding amorphous alloy ribbon. Saturation magnetization (sigm a(s)) and Curie temperature (T-c) for the bulk sample are about 1.2 T and 6 20 K, respectively, both of which agree with those of the melt-spun ribbon. Furthermore, the maximum permeability (mu(max)) and the coercivity (H-c) f or the bulk glassy sample in as cast state are about 110000 and 2.2 A/m, re spectively. These excellent soft magnetic properties are presumably due to a higher degree of structural homogeneity resulting from its high glass-for ming ability. It is concluded that the good soft magnetic properties combin ed with high glass-forming-ability and castability of the Fe-AI-Ga-PC-B-Si glassy alloy hold promise for its development as a future engineering magne tic material.