Recently. bulk amorphous alloys have attracted great attention for future development of basic science and engineering application. Although the maximum sample thickness of these amorphous alloys reaches as large as above 40 mm, their alloy compositions had been limited to nonferrous systems such as Mg-Ln-TM. Ln-Al-TM, Zr-Al-TM. Ti-Zr-Al-TM-Be and Zr-Ti-TM-Be. Based on the alloy compositions of these multicomponent amorphous alloy systems, the three empirical rules for the achievement of large glass-forming ability have been proposed by the present authors~([1]). According to the empirical rules, more recently, bulk amorphous alloys with ferromagnetism were searched in Fe- and Co-based alloy systems and found in Fe-based multicomponent systems. This paper is intended to present the first successful evidence for the formation of bulk Fe-based amorphous alloys with diameters or thicknesses above 1.0 mm by a copper mold casting process and their soft magnetic properties in as-quenched and annealed states.
展开▼
