Abstract
In the Fe-Co alloy system, the addition of Cr improves the glass-forming ability (GFA) with superior soft magnetic properties such as high saturation magnetization (Ms) and low coercivity (Hc). In addition, Cr is considered to be an important factor for improving the corrosion resistance of Fe-based amorphous alloy. Therefore, in the present study, we investigated the GFA, soft magnetic properties, and corrosion resistance of the as-spun ribbons in [Co0.075Fe0.675B0.2Si0.05]100−xCrx (x = 0–8) alloy system. The ribbons were produced using the melt-spinning technique and were characterized by X-ray diffraction, differential scanning calorimetry, thermomechanical analysis, and vibrating sample magnetometer. The Co-Fe-B-Si-Cr alloys exhibited high thermal stability and a high Ms of 0.93–1.53 T. Corrosion properties were evaluated by cyclic voltammetry. The addition of Cr improved the corrosion resistance of the alloys. The alloys with a higher Cr content exhibited a higher corrosion resistance. The optimum combination with soft magnetic properties and corrosion resistance of Fe-co based amorphous alloys can be utilized for extensive fields of application through a variation of Cr contents.
Highlights
Fe-based amorphous alloys are very attractive for industrial application due to the possibility of obtaining alloys with superior mechanical properties such as high strength, good soft magnetic properties and have been used in application fields of magnetic and high specific strength materials [1,2,3]
Due to the relatively low glass-forming ability (GFA), there is a limit for multifunctional applications of Fe-based amorphous alloys [5,6,7,8]
This study investigated the effects of the Cr addition on GFA, magnetic properties, and corrosion resistance of as-spun [Co0.075 Fe0.675 B0.2 Si0.05 ]100−x Crx (x = 0–8) ribbons
Summary
Fe-based amorphous alloys are very attractive for industrial application due to the possibility of obtaining alloys with superior mechanical properties such as high strength, good soft magnetic properties and have been used in application fields of magnetic and high specific strength materials [1,2,3]. These alloys are considered to be excellent candidates for protecting steel surfaces because they have a high crystallization temperature (Tx ), as well as high corrosion and wear resistance [4].
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