Abstract We have produced hot-deformed Nd-Fe-B magnets from commercial (MQU-F) Nd-Fe-B ribbons. The spark-plasma-sintering technique was used to deform the samples under low pressures of 40 MPa. The initial stages of the hot-deformation process were investigated in terms of microstructures and magnetic properties. Hot-deformed magnets with different deformation ratios were produced and the dependence of the remanence on the deformation ratio was determined. In the initial stages of the hot-deformation process, a cone-like shape of the magnet was observed for the first time. The experimental data can be qualitatively interpreted by applying the basic Stoner–Wohlfarth model.

中文翻译：

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低压火花等离子烧结热变形钕铁硼磁体的磁性能及微观结构演变

摘要 我们已经用商业 (MQU-F) Nd-Fe-B 带材生产了热变形 Nd-Fe-B 磁体。使用火花等离子体烧结技术在 40 MPa 的低压下使样品变形。从微观结构和磁性能方面研究了热变形过程的初始阶段。生产了具有不同变形比的热变形磁体，并确定了剩磁对变形比的依赖性。在热变形过程的初始阶段，首次观察到磁体呈锥形。可以通过应用基本的 Stoner-Wohlfarth 模型对实验数据进行定性解释。