Effect of heat treatment on phase transformations and magnetization of amorphous Co69Fe4Cr4Si12B11 microwires
Effect of heat treatment on phase transformations and magnetization of amorphous Co69Fe4Cr4Si12B11 microwires
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DOI：
10.1016/j.jallcom.2018.01.114
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发表时间：
2018-04
影响因子：
6.2
通讯作者：
G. Elmanov;P. Chernavskii;I. Kozlov;P. S. Dzhumaev;E. Kostitsyna;V. Tarasov;A. Ignatov;S. Gudoshnikov
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文献类型：
--
作者：
G. Elmanov;P. Chernavskii;I. Kozlov;P. S. Dzhumaev;E. Kostitsyna;V. Tarasov;A. Ignatov;S. Gudoshnikov
研究了Co 69Fe 4Cr 4Si 12 B 11非晶微丝在三阶段晶化过程中相组成的定性和定量变化以及显微组织的变化。在第一和第二阶段之后，结晶共相的量为36重量%。为了研究合金在加热、暴露和冷却过程中的磁化，使用了具有化学微反应器的独特振动磁力计。独特的振动磁力计用于受控大气下的低惯性实时测量。测定了晶化过程中各相的居里温度。通过对磁化动力学曲线的分析，建立了初晶阶段的成核和长大机制。结果发现，一维机制是负责的钴基晶体的生长，并导致一个特定的针状结构的形成。在第二晶化阶段，形成了具有Co23B6结构类型的亚稳相。该相的居里温度为165 °C。
The results of qualitative and quantitative changes in phase composition as well as microstructure changes of amorphous Co69Fe4Cr4Si12B11microwires at three stage crystallization process of are presented. After first and second stages the amount of crystalline Co-phase was 36 wt%. To study magnetization of the alloy during heating, exposure and cooling a unique vibration magnetometer with a chemical microreactor was used. The unique vibration magnetometer was used for low inertia real-time measurements under controlled atmosphere. The Curie temperatures of phases formed in the crystallization process were determined. Based on the analysis of magnetization kinetic curves, nucleation and growth mechanisms were established on the stage of primary crystallization. It was found that a one-dimensional mechanism is responsible for the growth of Co-based crystals and leads to the formation of a specific needle-shaped structure. At the second crystallization stage of a metastable phase with a Co23B6structure type was formed. The Curie temperature of this phase was 165 °C.