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Metastable and quasiperiodic phases in rapidly quenched Fe–B–Si–Nb(Cu) alloys
Author(s) -
Lyasotskii I. V.,
Dyakonova N. B.,
Vlasova E. N.,
Dyakonov D. L.,
Yazvitskii M. Yu.
Publication year - 2006
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200521126
Subject(s) - quasiperiodic function , devitrification , materials science , crystallography , crystallization , metastability , amorphous solid , transmission electron microscopy , annealing (glass) , phase (matter) , orthorhombic crystal system , tetragonal crystal system , condensed matter physics , crystal structure , chemistry , metallurgy , nanotechnology , physics , organic chemistry
The formation of metastable phases as a result of devitrification of amorphous iron‐based alloys, in particular at the initial stages of the process, was investigated. Compositions with 4–14 at% B, 3–10 at% Nb, 13–15 at% Si, 0–1 at% Cu were studied by means of transmission electron microscopy, X‐ray diffraction, and differential thermal analysis. The following metastable phases were observed: bcc phase with α‐Mn‐type structure; quasiperiodic structure with cubic symmetry; hexagonal phase (rhombohedral distortion of α‐Mn structure); and Laves C14 phase. Some of these phases are also observed in “Finemet” alloys with 1% Cu: cubic quasiperiodic phase and α‐Mn‐type phase after laser annealing of amorphous phase, and the hexagonal phase at the late stages of crystallization. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)