Effects of Fe substitution for Co on the thermal, magnetic, and mechanical properties of the Co-Fe-B-Si-Mo alloy system

• Published in: Journal of the Korean Physical Society Vol. 72; no. 1; pp. 171 - 176
• Main Authors: Kwon, Seoyeon, Kim, Sumin, Choi-Yim, Haein, Lee, Dukhyun, Kwon, SeongJun, Kim, KiBuem
• Format: Journal Article
• Language: English
• Published: Seoul The Korean Physical Society 01.01.2018; Springer Nature B.V; 한국물리학회
• Subjects: Alloy systems; Alloys; Crystallization; Ferrous alloys; Indentation; Magnetic alloys; Magnetic properties; Magnetic saturation; Magnetism; Mathematical and Computational Physics; Mechanical properties; Melt spinning; Modulus of elasticity; Molybdenum base alloys; Particle and Nuclear Physics; Physics; Physics and Astronomy; Silicon base alloys; Theoretical; Thermal analysis; X-ray diffraction; 물리학; Soft magnetic properties; Amorphous; Co-based
• ISSN: 0374-4884; 1976-8524
• DOI: 10.3938/jkps.72.171

The effects of Fe content on the thermal, magnetic, and mechanical properties of a Co 72 B 19.2 Si 4.8 Mo 4 alloy were studied. Amorphous soft magnetic alloys of (Co 1− x Fe x ) 72 B 19.2 Si 4.8 Mo 4 (0 ≤ x ≤ 1) with 3-mm widths and 27 - 30 μm thicknesses were obtained by using the melt spinning technique. The crystallization temperature ( T x ) for each alloy was measured by using differential scanning calorimetry (DSC). All ribbons were identified as fully amorphous by using X-ray diffraction (XRD). The magnetic properties of the amorphous ribbons were measured by using a vibrating sample magnetometer (VSM). The Fe-only ribbon ( x = 1) showed the highest saturation magnetization of 1.15 T in these alloys. Also, the nano-hardness ( H nanoindentation ), and Young’s modulus ( E ) were evaluated by using nano-indentation experiments, and Co 21.6 Fe 50.4 B 19.2 Si 4.8 Mo 4 ( x = 0.7) show a nano-hardness ( H nanoindentation ) of 18.92 GPa.