The novel quaternary compound Fe11–xCox TiCe (x = 0 to 3.25) of Mn12Th structure has been fabricated by arc melting. The analysis is focused on temperature dependent determination of intrinsic properties from 4 K to 750 K using domain pattern analysis and magnetometry. Above room temperature RT maximum values of anisotropy constant K1 and saturation polarization Js are observed for a Co content of 15 at% (x = 1.95) with K1 and Js of 2.15 MJ/m3 (1.22 MJ/m3) and 1.27 T (1.05 T) at RT (200 °C). At operating temperatures of 100 °C for this material magnetic properties (BH)max= 282 kJ/m3, µ0Hc = 0.94 T are expected. If a suitable microstructure could be processed, based on intrinsic properties of the phases the costs would be 35% per J/m3 of the costs of Dy‐free Fe–Nd–B. (© 2014 WILEY‐VCH Verlag GmbH &Co. KGaA, Weinheim)

Lab scale additive manufacturing of Fe‐Nd‐B based permanent magnet material (Fe75‐Nd18‐B7) has been performed. For fabrication a special inert gas process chamber for laser powder bed fusion has been used. This is required because Fe‐Nd‐B powders are extremely sensitive to oxidation. Selective laser melting (SLM) of the powders allows to realize very fine microstructures with a directed crystal growth and finely dispersed Nd‐rich phase. It is shown, that this fine and textured microstructure leads to large coercivity in sintered Fe‐Nd‐B magnets. A prototype has been realized by milling the SLM alloy and sintering.

By high‐throughput screening the ternary Fe–Hf–Sb system, off‐stoichiometric (Fe,Sb)2+xHf1−x with a composition of Fe60.0–Hf26.5–Sb13.5 with high potential as hard magnetic phase is discovered. By quantitative domain structure analysis, promising intrinsic properties of Js ∼ 1  T, K1 ∼ 1.5 MJ  m−3 are found at room temperature. By magnetometry, bulk intrinsic properties of Js ∼ 0.7 T, K1 ∼ 1.4 MJm−3 are found. Alloying elements like Co or Mn turns out to be an effective adjusting screw on the crystal structure and ferromagnetic behavior.

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