Thermal stability and magnetic properties of FeCoBSiNb bulk metallic glasses

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• 作者：Mihai Stoica ; Ran Li ; Alain Reza Yavari ; Gavin Vaughan ; Jü ; rgen Eckert ; Nele Van Steenberge ; Daniel Ruiz Romera
• 关键词：Amorphous materials ; X-ray diffraction ; Synchrotron radiation
• 刊名：Journal of Alloys and Compounds
• 出版年：2010
• 出版时间：August 2010
• 年：2010
• 卷：504
• 期：Supplement 1
• 页码：S123-S128
• 全文大小：380 K

文摘

For the present study, [(Fe_0.5Co_0.5)_0.75B_0.20Si_0.05]₉₆Nb₄ bulk metallic glasses (BMGs) were cast as cylinders with 2 mm diameter and 50 mm length. The first crystallized product, the metastable Fe₂₃B₆-type like phase, forms as a result of primary crystallization. The thermal stability and the crystallization kinetics were studied using the isochronal and isothermal DSC curves, measured at different heating rate and temperatures. Despite their good glass-forming ability (GFA) and high stability against crystallizations, their incubation time prior crystallization is almost zero. In order to rule-out the complete crystallization mechanism, in situ time resolved studies using the synchrotron radiation were done. The magnetic properties of the BMGs are strongly related to their structure and will be presented as well.