RT Journal Article
T1 Capacitor Electrical Discharge Sintering of Amorphous Fe-Si-B Powder
A1 Aranda Louvier, Rosa María
A1 Urban. Petr, 
A1 Cintas, Jesús
A1 Montes, Juan Manuel
A1 Gómez Cuevas, Francisco de Paula
K1 Capacitor electrical discharge sintering
K1 Amorphous/nanocrystalline alloys
K1 Powder metallurgy
K1 FAST
K1 Melt spinning
K1 Mechanical milling
AB High purity powders of Fe, Si and B mixed with atomic composition Fe78Si9B13 are subjected, after arc melting, to a melt spinning process. The amorphous ribbons are transformed into powder by mechanical milling, reaching mean sizes of 65 and 262 µm, taking care of maintaining the amorphous character. The powders are sintered by means of a very quick capacitor electrical discharge (CEDS), while trying to maintain the initial structure of the powders. The CEDS process is analyzed depending on the thermal energy applied during the discharge, as well as on the particle size of the powders and the powders’ mass. The porosity, microstructure, hardness, electrical resistivity and magnetic properties of the prepared compacts are analyzed. Thus, for powders with a mean size of 262 μm, the porosity can be reduced from 0.33 to 0.11 after sintering, reaching a microhardness of up to 1100 HV1 after applying a discharge of 2640 J/s. A coercivity of 1895 A/m and a saturation flux density of 1.32 T are achieved in the compact, which maintains a microstructure with up to 64% of amorphous phase.
PB MDPI
YR 2026
FD 2026
LK https://hdl.handle.net/10272/28173
UL https://hdl.handle.net/10272/28173
LA eng
NO Aranda, R. M., Urban, P., Cintas, J., Montes, J. M., & Cuevas, F. G. (2026). Capacitor Electrical Discharge Sintering of Amorphous Fe-Si-B Powder. Metals, 16(2), 239. https://doi.org/10.3390/met16020239
NO This work investigates the consolidation of amorphous Fe–Si–B powder by Capacitor Electrical Discharge Sintering (CEDS), a rapid densification technique based on high-energy pulsed current. The study analyzes the influence of discharge parameters on densification behavior, microstructural evolution, and phase stability, with particular attention to the retention of the amorphous structure during processing. The results highlight the interplay between Joule heating, pressure, and extremely short processing times, providing insight into the mechanisms governing consolidation while minimizing crystallization. This approach demonstrates the potential of CEDS for producing bulk amorphous or nanostructured metallic materials with tailored properties.
NO EPIT2024 University of Huelva
DS Repositorio Institucional de la Universidad de Huelva
RD 31 may 2026