The fabrication of soft magnetic Fe parts by the medium-frequency electrical resistance sintering (MF-ERS) technique is studied in this paper. This consolidation technique involves the simultaneous application to metallic powders of pressure and heat, the latter coming from the Joule effect of a low-voltage and high-intensity electric current. Commercially pure iron powder was used in the consolidation experiences. The porosity distribution, microhardness, electrical resistivity and hysteresis curves of the final compacts were determined and analysed. The results obtained were compared both with those of compacts consolidated by the conventional powder metallurgy (PM) route of cold pressing and vacuum furnace sintering, and with fully dense compacts obtained by double cycle of cold pressing and furnace sintering in hydrogen atmosphere.

中文翻译：

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软磁粉末冶金铁件的中频电阻烧结

本文研究了采用中频电阻烧结（MF-ERS）技术制备软磁性铁零件。这种固结技术涉及同时对金属粉末施加压力和热量，后者来自低电压和高强度电流的焦耳效应。在固结经验中使用了商业纯铁粉。确定并分析了最终压块的孔隙率分布、显微硬度、电阻率和滞后曲线。将所得结果与通过冷压和真空炉烧结的传统粉末冶金 (PM) 路线压实的压块，以及通过冷压和氢气气氛炉烧结双循环获得的完全致密压块进行比较。