A Low Temperature Route for the Synthesis of Rare Earth Transition Metal Borides and Their Hydrides

Boron-Induced Hydrogen Localization in the Novel Metal Hydride LaNi3BHx(x= 2.5−3.0)

“…Another family of intermetallic borides, R 5 Fe 2 B 6 (R = rare earth), was investigated with respect to the hydrogenation-assisted homogenization of alloys that are potentially useful for the production of hot-pressed magnets. , Hydrogenation behavior and crystal structures were reported, but the positions of the hydrogen atom were not determined. A third group of borides, with a stoichiometric composition of RT 4 B (R = wide range of rare earth elements, T = Fe, Co, Ni), was hydrogenated either by a solid−gas reaction or by soaking in NaBH 4 solution …”

Reaction pathways of oxide-reduction-diffusion (ORD) synthesis of SmCo5 and in situ study of its hydrogen induced amorphization (HIA)

“…Syntheses, in which this step is combined with a further reaction of the reduced metal to a product, often formed in the calcium melt, are sometimes called ORD method (oxide reduction diffusion) and were applied successfully to magnetic materials such as Nd 2 Fe 14 B, YCo 4 B and YCo 5 [19]. Our first attempts to use this method for producing SmCo 5 according to the reaction Sm 2 O 3 þ3Ca þ 10Co-2SmCo 5 þ 3CaO, using simple temperature holding periods (heating up from room temperature to 1323 K with 6 K/min and holding for 6 h before cooling to room temperature) did not yield any SmCo 5 .…”

Structure and hydrogenation study of nickel substituted NdCo3NiB

“…in the pressure range 0-100 atm, at 273-326 K. For some members hydrogen site occupancies were proposed [2] but not experimentally verified. Some compounds of this family were obtained via the chemical route and contained more than 4 hydrogen atoms per formula unit [3]. However, their hydrogenation properties and hydrogen distributions have not yet been measured.…”