Abstract Alnico5 ribbons were prepared by melt spinning at 15 m/s and followed by annealing at 835 °C for 10 min and 580 °C for 4 h. The effects of magnetic field and annealing on the structure and magnetic properties of the ribbons were investigated. The results show that α1 and α2 phases display minor differences in elemental concentrations and the α1 phase presents an irregular morphology and inhomogeneous distribution when the ribbons are annealed without magnetic field. While a regular spinodal structure can be quickly formed after the ribbons are annealed only at 835 °C for 10 min under a magnetic field of 4 kOe, and a perfect spinodal structure consisting of about 60.9%–65.6% α1 and 34.4%–39.1% α2 finally builds up after further annealed at 580 °C for 4 h. The magnetic field plays an important role in promoting the diffusion of elements and accelerating the formation of spinodal structure, which leads to the remanence and maximum magnetic energy product increasing from 4.7 kGs and 1.25 MGOe to 8.8 kGs and 3.57 MGOe, respectively. And the microstructure evolution models are also presented.

中文翻译：

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磁场和退火对铝镍钴带结构和磁性能的影响

摘要 通过以 15 m/s 的速度熔体纺丝，然后在 835 °C 下退火 10 分钟和 580 °C 下退火 4 小时制备 Alnico5 带。研究了磁场和退火对薄带结构和磁性能的影响。结果表明，带材在无磁场退火时，α1和α2相的元素浓度差异很小，α1相呈现出不规则的形貌和不均匀的分布。而带材在4 kOe的磁场下仅在835°C下退火10分钟即可快速形成规则的旋节线结构，而完美的旋节线结构由约60.9%–65.6%的α1和34.4%–39.1%组成在 580°C 下进一步退火 4 小时后，α2 最终形成。磁场在促进元素扩散和加速旋节线结构形成方面起重要作用，导致剩磁和最大磁能积分别从4.7 kGs和1.25 MGOe增加到8.8 kGs和3.57 MGOe。并提出了微观结构演化模型。