Elsevier

Physica B: Condensed Matter

Volume 193, Issue 2, 1 February 1994, Pages 147-153
Physica B: Condensed Matter

The lattice structure of nanocrystalline Fe-Cu-Si-B alloys

https://doi.org/10.1016/0921-4526(94)90005-1Get rights and content

Abstract

Nanocrystalline Fe-Cu-Si-B alloys with different grain sizes were synthesized by crystallization of an amorphous alloy. Two nanophases, α-Fe(Se) and Fe2B, were noticed in all samples. XRD results reveal that the lattice constant of the α-Fe(Si) phase increases; the a-axis is elongated and the c-axis is shortened in the Fe2B phase upon reducing the grain size. Based on the thermodynamic analysis, the changes in the lattice parameters were attributed to the solution of vacancies in the above two phases. Owing to the lattice distortion of the α-Fe(Si) and Fe2B phases, the crystallite with small size is found to exhibit a disordered character to some extent, which is manifested by large values of the half linewidth (HLW) and isomer shift (IS) of various Fe configurations in the Mössbauer parameters.

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