Structural and phase transformations in the low-temperature annealed amorphous 鈥渇inemet鈥?type microwires

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• 作者：V.V. Tcherdyntsev ; A.A. Aleev ; M.N. Churyukanova ; S.D. Kaloshkin ; E.V. Medvedeva ; O.A. Korchuganova ; V. Zhukova ; A.P. Zhukov
• 关键词：Microwires ; FINEMET ; Curie temperature ; Differential scanning calorimetry ; Atom probe tomography
• 刊名：Journal of Alloys and Compounds
• 出版年：15 February, 2014
• 年：2014
• 卷：586
• 期：supp_S1
• 页码：S225-S230
• 全文大小：4050 K

文摘

Finemet-type glass-coated microwires with amorphous and nanocrystalline structure have been investigated. The relaxation and crystallization processes at heating of amorphous alloy have been studied by DSC method. We observed that the relaxation processes in the amorphous phase correlate with an increasing of the Curie temperature. Additionally a prolonged exposure of the samples below the crystallization temperatures does not stabilize the Curie temperature change. An investigation by the tomographic atom probe microscopy supports the formation of precipitations, probably 伪-Fe phase, as a result of low-temperature annealing (400 掳C, 5 min). We found that the observed nano-sized areas were enriched in silicon.