A Study of Structure and Magnetic Properties of Low Purity Fe-Co-Based Metallic Glasses

Abstract

This paper is related to the evaluation of the possibility of using ferroalloys for the production of conventional (CMGs) and bulk metallic glasses (BMGs) as well as determining their magnetic properties. The structure and magnetic properties of Fe-Co-based CMGs and BMGs prepared from ferroalloys and pure elements, were studied. The CMGs and BMGs were in the form of ribbons and rods, respectively. The thickness of the ribbons were 0.07, 0.12, and 0.27 mm and the diameters of the rods were 1.5 and 2.5 mm. The investigations of the structure of the test specimens were carried out using the X-ray diffraction (XRD) method and electron microscopy methods (HRTEM—high-resolution transmission electron microscope, SEM—scanning electron microscope). The relationship between the structure and magnetic properties of the Fe36.00Co36.00B19.00Si5Nb4 and Fe35.75Co35.75B18.90Si5Nb4Cu0.6 CMGs and BMGs was determined. The possibility of using new materials, i.e., CMGs and BMGs, prepared on the basis of ferroalloys, lies in the scope of the presently conducted research and allows us to obtain the utility properties, while avoiding high costs associated with the purchase of raw materials.

Effect of Raw Material Purity on Structure and Properties of Metallic Glasses

“…Recently, scholars have tried to fabricate metallic glasses with low purity raw materials. At present, a host of researches mainly focus on iron base, zirconium base, titanium base metallic glasses systems [1][2][3]. Guo [4] fabricated Ti40Zr25Be20Cu13Ni13 metallic glasses using high purity raw materials with a critical size greater than 14mm, while Zhang [5] fabricated the alloy with the same composition using low purity raw materials with a critical size of only 5mm.…”

Glass-Forming Ability and Soft Magnetic Properties of (Co75Ti25)100−xFex (x; 0–20 at.%) Systems Fabricated by SPS of Mechanically Alloyed Nanopowders

“…All work related to the preparations, characterizations, and implementations of metallic glassy alloys has discovered advanced properties of this category of materials that are not found when the same alloys are in their stable crystalline states [ 13 ]. The recent studies of a wide range of new metallic glassy systems have discovered beneficial properties of these materials, such as unusual corrosion resistance, high hardness, unique mechanical ductility, and yield strength, and high magnetic permeability with low coercive force [ 14 , 15 , 16 , 17 , 18 , 19 , 20 ]. Therefore, metallic glasses are now considered to be promising candidates for several technical applications in engineering, electronics, medical, defense and aerospace industries, and sports sectors [ 15 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 ].…”