CHARACTERIZATION OF AMORPHOUS ALLOY Co87Nb46B15

Abstract

This paper presents a discussion of the processing and characterization of alloy Co 87 Nb 46 B 15 produced by rapid solidification, in which characterization techniques such as X-Ray Diffraction (XRD), scanning electron microscopy and spectroscopy Dispersion Energy (SEM / EDS) and magnetic properties were used, with the study of hysteresis curve. Several researches have been making on nanocrystalline materials, especially cobalt-base alloys, because of their thermodynamic stability, characterization and processing. Amorphous alloys have a structure of ultrafine, homogeneous grains with small crystal clusters in amorphous phase.

Optimal bilayer composites for temperature-tracking wireless electronics

“…S2 †). 28,29 This amorphous structure can synergistically contribute to a reduction in thermal conductivity, complementing the inherently low thermal conductivity of the air enclosed within the hollow silica particles.…”

Effects of Heat Treatment on some Magnetic Properties of Amorphous Alloys Containing Fe49Ni29Si9 B13 and Fe59Ni19Si9 B13

“…However, at the beginning of the crystallization phase, when the first fine-grained crystalline particles are formed (Figure 3), the best magnetic-soft properties are observed in this studied material (B r = 2.16Tl). According to the theory of the directional atomic pair ordering (Néeyel-Taniguchi theory), when a system is thermally activated and becomes under the influence of an external magnetic field, the atomic pairs are arranged in such a way that their total magnetic energy becomes minimal [6][7][8][9][10]. After that, when the system is cooled to a low temperature, ie until the diffusion of atoms is stopped, the orientation of the atomic pairs almost freezes.…”

“…The magnetic properties are significantly affected by even a small change in the amount of elements in the chemical composition. For example, it is known that an increase in Ni in a 30% FeNi alloy does not reduce the sensitivity to anisotropy and correction force [3][4][5][6][7]. Particular interest is the reshaping of the structure of the samples without breaking the amorphous phase as a result of the influence of different processing regimes and the changes that occur in the magnetic properties at this stage.…”

“…Particular interest is the reshaping of the structure of the samples without breaking the amorphous phase as a result of the influence of different processing regimes and the changes that occur in the magnetic properties at this stage. For example, in Fe 45 Co 45 Ni 10 alloy, a significant decrease in the coercive force is felt when the size of the grains formed at this stage is in the order of 10nm [4][5][6][7][8].…”