非晶合金Fe78Si9B13在脉冲电流作用下的单相晶化

对非晶合金Fe₇₈Si₉B₁₃进行了超短脉冲电流处理，实现了晶化时α-Fe（Si）单相结构析出．可以认为，脉冲电流作用时，电子运动与非晶中空位型结构缺陷间的周期性排斥效应促进了类金属原子从非晶结构单元中析出，使Fe（Si）原子局部富集，导致基体金属相在较低温度下优先成核．而在空位的定向迁移的同时，将伴随B原子的扩散，则B原子局域富集，Fe-B化合物的形核析出就要受到这两个因素的抑制 关键词：

SINGLE-PHASE CRYSTALLIZATION IN AMORPHOUS Fe78Si9B13 ALLOY INDUCED BY ELECTROPULSING

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.