Processing soft ferromagnetic metallic glasses: on novel cooling strategies in gas atomization, hydrogen enhancement, and consolidation

N. Ciftci^a, N. Yodoshi^b, S. Armstrong^a^,^c, L. Mädler^a^,^c, V. Uhlenwinkel^a^,^c^,^*(

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Fig. 9.. Coercivity (a) and permeability (b) of sintered toroidal rings for two soft ferromagnetic glass-forming alloys ({(Fe_0.6Co_0.4)_0.75B_0.2Si_0.05}₉₆Nb₄ and Fe₇₆B₁₀Si₉P₅). The rings had an outer and inner diameter of 13 and 8 mm as well as a height of 2.6 ± 0.15 mm. Two particle size classes were used to consolidate the powders (< 25 μm and 25-45 μm). The abbreviations GA, GA + SCC, and GA + LQ stand for conventional gas atomization, conventional gas atomization and spray cone cooling, and conventional gas atomization and liquid quenching, respectively (see Fig. 1).