Analysis of Fe78Si9B13 (%at.) ribbons of noncommercial scrap materials produced by melt spinning equipment

M. PAGNOLA; M.MALMORIA; M.BARONE; H.SIRKIN

Multidiscipline Modeling in Materials and Structures

Emerald Group Publishing

Año: 2014 vol. 10 p. 511 - 524

1573-6105

The aim of this work is to present a ribbons production route of composition Fe78 Si9 B13 (%at.) using low cost noncommercial scrap materials to obtain usable magnetic cores by melt spinning technique and their characterization. This way, these may compete with the materials produced by conventional casting processes. With our technique a wheel´s tangential speed selected and the wheel+crucible gaps are 40 m/s and 3 mm respectively. With a 0.6 mm diameter exit hole in the nozzle, are obtained approximately 1.18 mm wide and 32 micr thick amorphous ribbons at a 2.73x106 K/s cooling rate and an estimated solidification time of 9.4x10+7s. The ribbon is reaching temperatures in the order of 140 °C in their forming. The homogeneity control is performed by Energy Dispersive Spectroscopy (EDS) technique; the alloy hyperfine parameters were studied by Mossbauer Spectroscopy (MS), the microstructure by Xray diffraction (XRD) and the basic magnetic properties by a Superconducting Quantum Interference Device (SQUID) magnetometer. The Differential Scanning Calorimetry (DSC) technique is used to determine the first and second crystallization temperatures, as well as the vitreous transforming temperature.