Microstructure and high-temperature soft magnetic properties of nanocrystalline (Fe0.65Co0.35)78.4Si9B9Nb2.6Cu1 alloy
Microstructure and high-temperature soft magnetic properties of nanocrystalline (Fe0.65Co0.35)78.4Si9B9Nb2.6Cu1 alloy
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DOI：
10.1016/j.msea.2006.12.017
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发表时间：
2007-03
期刊：
影响因子：
6.4
通讯作者：
Xiaohua Ma;Zhi Wang;Xiantang Han;X. Yin;Boyuan Wang
中科院分区：
文献类型：
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作者：
Xiaohua Ma;Zhi Wang;Xiantang Han;X. Yin;Boyuan Wang
研究了纳米晶（Fe 0. 65 Co 0. 35）78. 4Si 9 B 9 Nb 2. 6 Cu 1合金的结构特征和高温软磁性能。在460°C ~ 640°C的不同温度下退火0.5h，得到了由非晶基体和α-FeCo纳米晶组成的两相纳米晶结构。描述了从室温到730°C的初始磁导率的温度演变。矫顽力（Hc）和饱和磁感应强度（Bs）是通过在室温下的磁滞回线测量。结果表明，在550-640 ℃退火后，样品的高温软磁性能得到改善。显微组织对合金的高温磁性能有重要影响。用两相随机各向异性模型和晶间非晶层的交换耦合机制对实验结果进行了讨论。
Structural characteristics and high-temperature soft magnetic properties of nanocrystalline (Fe0.65Co0.35)78.4Si9B9Nb2.6Cu1alloy were investigated. A two-phase nanocrystalline structure composed of the amorphous matrix and the α-FeCo nanocrystallites was obtained by annealing samples at different temperatures from 460°C to 640°C for 0.5h. The temperature evolution of initial permeability was described from room temperature to 730°C. Coercivity (Hc) and saturation magnetic induction (Bs) were obtained by means of hysteresis loops measurements at room temperature. Results showed that the samples annealed at 550–640 exhibited the improvement of the high-temperature soft magnetic properties. The microstructure exerted a significant effect on the high-temperature magnetic properties. These experimental results were discussed by means of the mechanism of the two-phase random anisotropy model and the exchange coupling through the intergranular amorphous layer.