Preparation and properties study of bulk Fe75.5Ga3P10.5C4B4Si3 metallic glass ring by copper mold casting

Bulk metallic glass tube casting

“…Bulk metallic glass rings or tubes have previously been manufactured by centrifugal casting [9], machining [10], modified water quenching [7], copper mold 0925-8388/$ -see front matter © 2010 Elsevier B.V. All rights reserved. casting [11][12][13] and coreless mold suction casting [8,14]. Centrifugal casting [9] and suction casting [8,14] were done without a core.…”

“…Modified water quenching [7] used a fused silica core. The copper mold casting [12,13] used vertical argon pressure ejection of induction-heated melt from a quartz crucible into the ring mold with minimal vertical runner length. MingZhen et al [11] used a more traditional lip pour ladle with both vertical and horizontal runners before the mold with a copper core.…”

“…Often the melt is cooled only from one side, possibly limiting the achievable tube wall thickness. When a core is used, the melt size has been very large, e.g., 780 g in [11], or the length of the ring was the smallest dimension [12,13]. When temporary molds are used [7], the molten alloy comes in contact with fused silica, which may cause embrittlement [15].…”

Glass-forming ability and magnetic properties of bulk ( or 2, , Nb, Ti) alloys

“…However, the preparation of those alloys requires the high glass-forming ability (GFA) which prevents the precipitation of any crystals during solidification. Series of amorphous alloys with good GFA have been found in Fe-based systems [1][2][3]. Some of those alloys [1,2] are very soft magnetic materials.…”

“…Series of amorphous alloys with good GFA have been found in Fe-based systems [1][2][3]. Some of those alloys [1,2] are very soft magnetic materials. For instance, the ring shaped Fe 70 Al 5 Ga 2 P 9:65 C 5:75 B 4:6 Si 3 alloy exhibits low coercive field of 2.2 A/m and high saturation magnetic induction of 1.2 T.…”