Structural aspects of magnetic softening in Fe-based metallic glass during annealing

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• 作者：J. Dai^a ; Y.G. Wang^a ; ^{yingang.wang@nuaa.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; L. Yang^a ; G.T. Xia^a ; Q.S. Zeng^b ; H.B. Lou^b
• 关键词：Metallic glass ; Annealing ; Synchrotron radiation ; Soft magnetic materials
• 刊名：Scripta Materialia
• 出版年：2017
• 出版时间：15 January 2017
• 年：2017
• 卷：127
• 期：Complete
• 页码：88-91
• 全文大小：565 K

文摘

Amorphous Fe₈₁Si₉B₁₀ melt-spun ribbons were annealed at various temperatures to relieve the internal stress. Magnetic studies manifest the occurrence of magnetic softening. The structure evolution of samples was then investigated by synchrotron radiation X-ray diffraction. It was found that, from short-range order to medium-range order, a positive and negative sign for volumetric thermal strain alternates upon heating and the amplitude of strain decays. Moreover, extending to outer shells, thermal strain seems less temperature-dependent in terms of the rate of increment. Magnetic softening in Fe₈₁Si₉B₁₀ metallic glasses upon annealing may result from the inhomogeneous thermal strains.