In the present work, extended X‐ray absorption fine‐structure (EXAFS) investigations of Co₆₉Fe_xSi_21–xB₁₀ (x = 3, 5, 7) glassy ribbons were performed at the Co K‐edge. The magnitude of the first peak of the Fourier transforms of the EXAFS signals is found to increase monotonically with increasing Si concentrations indicating the formation of the localized ordered structure at the atomic scale. The Co–Si coordination number (CN) increases at the expense of the CN of Co/Fe. Smaller interatomic distances are observed in the glassy phase compared with that in the crystalline phase which promotes the stability of the glassy phase. Calculations of the thermodynamic parameter (P_HSS), cohesive energy (E_C) and the atomic radius difference (δ) parameter show that the alloy composition Co₆₉Fe₃Si₁₈B₁₀ has a good glass‐forming ability (GFA) with the highest CN of Si compared with other compositions. A linear correlation of CN with that of the GFA parameter (P_HSS) exists and the CN also plays a crucial role in the GFA of the glassy alloys. This parameter should be considered in developing different GFA criteria.

中文翻译：

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扩展X射线吸收精细结构光谱研究Co-Fe-Si-B带的局部结构

在本工作中，在Co K边缘对Co ₆₉ Fe _x Si _{21– x} B ₁₀（x = 3，5，7 ）玻璃带进行了扩展的X射线吸收精细结构（EXAFS）研究。发现EXAFS信号的傅立叶变换的第一个峰的大小随Si浓度的增加而单调增加，表明在原子尺度上形成了局部有序结构。Co-Si配位数（CN）的增加以Co / Fe的CN的损失为代价。与结晶相相比，在玻璃相中观察到较小的原子间距离，这促进了玻璃相的稳定性。热力学参数的计算（P _HSS），内聚能（E _C）和原子半径差（δ）参数表明，与Co相比，Co ₆₉ Fe ₃ Si ₁₈ B ₁₀合金具有良好的玻璃形成能力（GFA）和最高的Si的CN。其他成分。存在CN与GFA参数（P _HSS）的线性相关，并且CN在玻璃态合金的GFA中也起着至关重要的作用。在制定不同的GFA标准时应考虑该参数。