A Comparative Study of Nanocrystalline Fe 38.5 Co 38.5 Nb 7 P 15Cu 1 Alloys Obtained by Mechanical Alloying and Rapid Quenching

Abstract

This paper presents a comparative study of the preparation and characterisation of Fe 38.5 Co 38.5 Nb 7 P 15Cu 1 alloy produced by mechanical alloying (MA) and rapid quenching (RQ) method. In order to obtain the starting mixture (SS) in the present study, we opted for the replacement of elemental Nb and P powders with ferroalloy powders of niobium and phosphorus. Benzene was used as a control agent of the process (PCA) for wet MA. The samples obtained (powders and ribbons) were characterised by X-ray diffraction (XRD), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), X-ray microanalysis (EDX), magnetic measurements M(H) and thermomagnetic measurements M(T). After 40 h of wet MA, the alloy was partially amorphous, and the ribbons obtained by RQ do not show an amorphous state. Also, the magnetic measurements show the influence of the method used on the magnetic properties.

Keywords

• mechanical alloying
• melt-spinning
• ribbons
• magnetisation
• ferroalloys