Abstract Crystalline structure, thermal stability and magnetic properties of Hf2(FexCo1−x)11B (x = 0.2, 0.4) alloys were investigated and compared to those of well-known Hf2Co11B parent compound. Fully amorphous ribbons were synthesized by rapid quenching. The increasing amount of Fe resulted in higher thermal stability of the amorphous ribbons, as the crystallization temperature increased from 622 to 632 °C for x = 0.2 and 0.4, respectively. Hf2Co11 (in rhombohedral and orthorhombic structure) and HfCo2 precipitate in Hf2(Fe0.2Co0.8)11B and Hf2(Fe0.4Co0.6)11B isothermally annealed at T = 610 °C. Fe-containing phases, as (FeCo)3B and α-Fe, were also formed. Moreover, annealing at T = 665 °C resulted in the formation of HfCo3B2 phase regardless of composition. The highest value of magnetization saturation was obtained for Hf2(Fe0.4Co0.6)11B melt-spun sample, while the coercive field and anisotropy constant were maximized for Hf2(Fe0.2Co0.8)11B after heat treatment at T = 610 °C.

中文翻译：

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由结构亚稳相合成的 Hf2(FexCo1-x)11B (x = 0.2, 0.4) 合金的磁性能

摘要 研究了 Hf2(FexCo1−x)11B (x = 0.2, 0.4) 合金的晶体结构、热稳定性和磁性能，并与众所周知的 Hf2Co11B 母体化合物进行了比较。通过快速淬火合成完全非晶带。随着 x = 0.2 和 0.4 的结晶温度分别从 622°C 增加到 632°C，Fe 量的增加导致非晶带的更高热稳定性。Hf2Co11（菱形和斜方结构）和 HfCo2 在 T = 610 °C 等温退火的 Hf2(Fe0.2Co0.8)11B 和 Hf2(Fe0.4Co0.6)11B 中沉淀。还形成了含铁相，如 (FeCo)3B 和 α-Fe。此外，无论成分如何，在 T = 665 °C 下退火都会导致 HfCo3B2 相的形成。Hf2(Fe0.4Co0.3) 的磁化饱和度最高。