Abstract 5 wt% Alnico5 doped Sm(Co0.9Cu0.1)5 ribbons were prepared by melt spinning at 40 m/s, and the effects of magnetic field heat treatment (MHT) and annealing on the phase composition, microstructure and magnetic properties of the ribbons were investigated. The results show that all three ribbons consist of Co-rich SmCo5-and Sm-rich CeCo5-type phases with a spinodal structure. Annealing increases the content of SmCo5-type phase, enlarges the component differences between the two types of Sm(Co,M)5 phases and accumulates Alnico alloying elements into 3 g site of CeCo5-type phase. MHT narrows the ingredient differences between them, prompting the Alnico alloying elements to diffuse simultaneously into 2c and 3 g sites of two Sm(Co,M)5 phases, and concentrates the CeCo5-type phase on grain boundaries of the SmCo5-type phase to pin the magnetic domain movement. The as-spun ribbons present the magnetic properties of Hc = 32.0 kOe, Mr = 46.2 emu/g and Ms = 59.1 emu/g, while MHT increases them by 10.0%, 10.2% and 19.5%, respectively. These results can contribute to disclose the multi-element doping mechanism for improving the magnetic properties of SmCo5-based or similar alloys.

中文翻译：

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由 Alnico 合金掺杂 SmCo5 基带的旋节线分解结构决定的优异磁性能

摘要 以 40 m/s 的速度熔融纺丝制备了 5 wt% Alnico5 掺杂的 Sm(Co0.9Cu0.1)5 薄带，并研究了磁场热处理 (MHT) 和退火对其相组成、显微组织和磁性能的影响。对色带进行了调查。结果表明，所有三个带都由具有旋节线结构的富钴 SmCo5 和富钐 CeCo5 型相组成。退火增加了 SmCo5 型相的含量，扩大了两种 Sm(Co,M)5 相之间的成分差异，并使 Alnico 合金元素积累到 CeCo5 型相的 3 g 位点。MHT 缩小了它们之间的成分差异，促使 Alnico 合金元素同时扩散到两个 Sm(Co,M)5 相的 2c 和 3g 位点，并将 CeCo5 型相集中在 SmCo5 型相的晶界上以固定磁畴运动。初纺丝带的磁性能为 Hc = 32.0 kOe、Mr = 46.2 emu/g 和 Ms = 59.1 emu/g，而 MHT 分别增加了 10.0%、10.2% 和 19.5%。这些结果有助于揭示用于改善 SmCo5 基或类似合金磁性能的多元素掺杂机制。