Aranda Louvier, Rosa MaríaUrban. PetrCintas, JesúsMontes, Juan ManuelGómez Cuevas, Francisco de Paula2026-04-082026-04-082026Aranda, 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/met16020239https://hdl.handle.net/10272/28173This 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.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.engAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/Capacitor electrical discharge sinteringAmorphous/nanocrystalline alloysPowder metallurgyFASTMelt spinningMechanical millingjournal article10.3390/met16020239open access33 Ciencias Tecnológicas