Abstract
AbstractSoft magnetic bulk glassy alloys have been synthesized in a variety of alloy systems by the copper mold casting process for 10 years since 1995. Their typical alloy systems are classified into five groups, that is (i) Fe(Al, Ga)metalloid, Fe(Cr, Mo)Gametalloid, and FeGametalloid, (ii) (Fe, Co)(Zr, Hf, Nb, Ta)B, (iii) (Fe, C)LnB, (iv) Fe(Cr, Mo, W)CB, and (v) (Fe, Co)BSi(Zr, Nb). The Fe‐ and Co‐based soft magnetic glassy alloys exhibit a large supercooled liquid region beyond 50 K before crystallization. The bulk glassy alloys have been produced in a thickness range of up to 6 mm by the copper mold casting method. In addition, the application of the consolidation technique using the viscous flow phenomenon of the Fe(Al, Ga)metalloid alloys caused the formation of fully dense bulk glassy alloys (BGAs) with rather good soft magnetic properties. The combination of good soft magnetic properties, high glass‐forming ability (GFA), and good workability into a bulk form holds promise for future development as a new type of soft magnetic material.
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