Open AccessSINGLE-PHASE CRYSTALLIZATION IN AMORPHOUS Fe78Si9B13 ALLOY INDUCED BY ELECTROPULSING
Author(s) -
Yang Chao,
Teng Gong-Qing,
Geng Yan,
Xiaowu Liu,
Lai Zuhan
Publication year - 1997
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.46.1369
Subject(s) - materials science , amorphous metal , crystallization , amorphous solid , phase (matter) , vacancy defect , nucleation , precipitation , diffusion , alloy , crystallography , chemical physics , metallurgy , thermodynamics , chemistry , physics , meteorology , organic chemistry
Amorphous specimens of Fe78Si9B13 have been treated by ultrashort pulse current. It was obtained that the α-Fe(Si) single-phase structure precipitated from the amorphous matrix of Fe78Si9B13 by adjusting the parameters of pulse current. It can be considered that the single-phase crystallization results from the periodic repulsion between the moving electrons and the vacancy-like structural defects in the amorphous parts.That is,the repulsive effect causes the metalloid atoms B to precipitate from the amorphous structural units and Fe(Si) atoms segregate in some localized region. So the basic metal phase is forced to nucleate at a lower temperature. However the directional migration of vacancy-like defects will be accompanied by diffusion of atoms B. Obviously,the segregation of atoms B and the precipitation of Fe-B compound will be checked by both factors the mentioned above.