The effect of B and P content on the amorphous forming ability (AFA), thermal stability, amorphous stability, and structural behavior was investigated in Fe-B-Nb-P alloys using metallic ribbons produced by a single-roller melt-spinning method. The maximum thickness, tmax, indicating AFA of Fe84-xB9Nb7Px (x = 0-4), increased from 19.5 to 68.7μm. The alloys exhibited two exothermic peaks to have resulted from the formation of bcc α-Fe and borides, respectively. The Fe84-xB9Nb7Px (x = 0-3) alloys with the wide interval between two exothermic peaks exhibited the high thermal stability compared to the commercialized composition of Fe73.5Si13.5B9Nb3Cu1. The wide range between the glass transition temperature and crystallization temperature means the super-cooled liquid region, leading to obtain the high stable amorphous phase. The super-cooled liquid region was observed in Fe81-yB9+yNb7P3 (y = 0-2) alloys and the endothermic reaction of the super-cooled liquid region got larger by increasing B content. The α-Mn type structure was observed in Fe80B10Nb7P3 alloy annealed at 823 K, and it was considered to improve the amorphous stability. The Fe81B9Nb7P3 alloy with a high AFA of 68.7μ m exhibited excellent magnetic characteristics, Bs of 1.51 T and Hc of 4.7 A/m.

中文翻译：

---

用于制造粉末的高非晶形成能力的Fe-B-Nb-P纳米晶合金


采用单辊熔体旋压法生产的金属带材，研究了 B 和 P 含量对 Fe-B-Nb-P 合金非晶形成能力 (AFA)、热稳定性、非晶稳定性和结构行为的影响。最大厚度 tmax（表示 Fe84-xB9Nb7Px (x = 0-4) 的 AFA）从 19.5 增加到 68.7μm。该合金表现出两个放热峰，分别是由 bcc α-Fe 和硼化物的形成引起的。与商业化成分 Fe73.5Si13.5B9Nb3Cu1 相比，两个放热峰之间间隔较宽的 Fe84-xB9Nb7Px (x = 0-3) 合金表现出较高的热稳定性。玻璃化转变温度和结晶温度之间的宽范围意味着过冷液体区域，导致获得高稳定的非晶相。 Fe81-yB9+yNb7P3(y=0-2)合金中存在过冷液体区，且随着B含量的增加，过冷液体区的吸热反应变大。 Fe80B10Nb7P3合金在823 K退火后观察到α-Mn型结构，这被认为提高了非晶稳定性。具有68.7μm高AFA的Fe81B9Nb7P3合金表现出优异的磁特性，Bs为1.51T，Hc为4.7A/m。