Abstract

The structure of the (Pr_{1 – x}Dy_x)_13.4(Fe_{1 – y}Co_y)_79.1B_7.5 and (Pr_{1 – x}Dy_x)_12.7(Fe_{1 – y}Co_y)_87.2B_10.1 alloys in the as-cast state after conventional solidification and after rapid quenching by melt spinning is studied. Phase analysis shows that, in the case of alloys with a higher boron content, the content of weakly magnetic phases increases. Differential scanning calorimetry allowed us to identify the magnetocaloric effect in the usually cast alloys at their Curie temperature and the crystallization and recrystallization processes of amorphous phase in the rapidly quenched alloys. The alloys in the initial cast state are characterized by a low coercive force of 0.8–8 kA/m (10–100 Oe). The rapidly quenched alloys, in which 2-14-1 main magnetic phase inclusions (REM₂(Fe, Co)₁₄B) are small (~10 μm) and well isolated from each other by an amorphous phase, are characterized by a high coercive force of 1600 kA/m (20 kOe).

中文翻译：

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快速和缓慢熔体冷却制备的 (Pr,Dy)-(Fe,Co)-B 合金的结构和磁性能

摘要

(Pr _{1 – x} Dy _x ) _13.4 (Fe _{1 – y} Co _y ) _79.1 B _7.5和 (Pr _{1 – x} Dy _x ) _12.7 (Fe _{1 – y} Co _y ) _87.2 B _{10.1 的结构}研究了常规凝固后和通过熔体旋压快速淬火后的铸态合金。相分析表明，对于硼含量较高的合金，弱磁性相的含量增加。差示扫描量热法使我们能够确定通常铸造的合金在居里温度下的磁热效应以及快速淬火合金中非晶相的结晶和再结晶过程。初始铸造状态的合金具有 0.8-8 kA/m (10-100 Oe) 的低矫顽力。快淬合金，其中 2-14-1 主磁性相夹杂物（REM ₂ (Fe, Co) ₁₄B) 小 (~10 μm) 并且通过非晶相相互隔离，具有 1600 kA/m (20 kOe) 的高矫顽力。