Thermal stability and magnetic properties of (Fe, Co)–Ga–(P, C, B, Si) bulk glassy alloys

✍ Scribed by Kenji Amiya; Akiri Urata; Nobuyuki Nishiyama; Akihisa Inoue

• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 194 KB
• Volume: 449-451
• Category: Article
• ISSN: 0921-5093
• DOI: 10.1016/j.msea.2006.02.397

✦ Synopsis

The replacement effect of Co for Fe on the glass-forming ability (GFA) and magnetic properties in the (Fe, Co)-Ga-(P, C, B, Si) systems were investigated. The glass-forming ability of (Fe 1-x Co x ) 73 Ga 4 P 11 C 5 B 4 Si 3 (numbers indicate at.%) alloys increased significantly by the addition of an optimum amount of Co. The maximum diameter of the glassy alloy rod (d max ) was 3.0 mm for Fe 73 Ga 4 P 11 C 5 B 4 Si 3 and increased to 5 mm for (Fe 0.8 Co 0.2 ) 73 Ga 4 P 11 C 5 B 4 Si 3 . However, the glass-forming ability of this alloy system decreases with further increasing Co content. The saturation magnetization was 1.26 T for (Fe 0.8 Co 0.2 ) 73 Ga 4 P 11 C 5 B 4 Si 3 and 1.40 T for (Fe 0.85 Co 0.15 ) 77 Ga 2 P 10 C 5 B 3.5 Si 2.5 . The d max for the latter alloy was 3 mm. The high GFA of (Fe, Co)-Ga-P-C-B-Si alloys seems to result from the necessity of the redistribution of Co for the progress of crystallization.