The microstructure of the nanocrystalline 78B13Si9 alloy, prepared by means of high-current-density electropulsing from the parent amorphous alloy (2605S-2), has been investigated by Mössbauer spectroscopy along with X-ray diffraction and transmission electron microscopy. The experimental results show that nanocrystalline 78B13Si9 alloy is uniformly composed of the grains about 23 nm in diameter, with an interfacial component. Two crystalline phases are a disordered α-Fe(Si) solid solution with an Si concentration of 11.3 at.% and t -Fe2B. The interface phase is ferromagnetic Fe6.7B4.1Si2.2 with large number of voids, and is estimated to be about 1.3 nm thick with four to five atomic layers. The examination of a comparable isothermally annealed amorphous 78B13Si9 sample reveals that the crystalline of the amorphous 78B13Si9 alloy and its ultrafine grain structure should be attributed mainly to the electromagnetic effect from high-current-density electropulsing. The mechanism involved is discussed.
No takes yet. Share an insight, caveat, or question.
Teng et al. (1996) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: