本文概要地总结了我们近年观测过的若干Fe-B基和Fe-Co-B-Si基非晶态合金的晶化行为,主要是成分对晶化温度T_(cr)和晶化激活能△E的影响.合金样品是宽1-2mm,厚30—50μm的液淬带.用差值扫描量热计(DSC)获得:(1)Fe-(100-x)B_x系的T_(cr)和△E都在x=16时出现最大值;(2)在所观测的几个合金系中凡过渡元素总含量的变化能使每原子的平均外层电子数减少的,T_(cr)和△E就随着上升.并依据近年被承认的理论模型作了讨论.
The crystallization kinetics studies during the recent years on the FeB and FeCoBSi Series of amorphous alloys as well as on the effect of alloying with various transition metals are summarized. The specimens were ribbons of 30—50 μm thickness and 1—2μm width prepared by the melt quenching technique. DSC and thermomagnetic measurements, and sometimes X-ray diffraction investigations were carried out. The main results are: (1) for the Fe_(100-x)B_x series, both the incipient crystallization temperature, T_(cr), and the corresponding activation energy, △E, exhibit a maximum value at x=16; (2) when the alloy composition was varied or an alloying transition element was added, both T_(cr) and △E increased with decreasing average number outer electrons per atom which was calculated by taking into account both the s, p and d electrons of the transition metal atoms. These and other less significant results are discussed in connection with various factors commonly regarded as effecting the stability of amorphous alloys.
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