Soft magnetic alloys with amorphous and ultra-fine grain structure upon loading with hydrogen

Oscillating Behavior of Chemical and Structural Characteristics of Alloys at Hydrogenation

“…Effectively, upon heating and progressively during a first step, nuclei or ultrafine structure, which atom coordination take place within the "bulk" of the ribbon corresponding well to the Fe3Si cubic-type structure. Then, in a second step and at higher temperature, crystallization of iron borides takes place [16]. The difference in succession of the process should be a consequence of non-equivalent distribution of the elements, on one side at the surface hydrogen-modified distribution, on the other side in the full volume of the ribbon when annealed.…”

Interaction of hydrogen with amorphous, nanostructured and fine crystalline functional materials

“…Thus, amorphous iron-rich A-C alloys can exhibit a null ability as fixed cantilever [3], oppositely to the initial materials. Obviously, the electronic and then the magnetic properties might be modified as well as the mechanical ones [4]. In this work, we report on the microhardness and electrochemical properties measured before and after hydrogenation of Fe-rich ribbons.…”

“…It was found [4] that after electrolytic hydrogen saturation the samples, noticeable and distinguished effects were induced on the magnetization versus temperature (M-T) curves for the A, B and C alloys, respectively. For the alloy B and C, to the initial state M, as recorded before and just after hydrogenation corresponds a huge increase of magnetization amplitude, reference to the nonhydrogen-loaded sample.…”