亚稳液相Spinodal分解法制备块体铁磁纳米结构Fe40Ni40P14B6合金
Formation of bulk ferromagnetic nanostructured Fe40Ni40P14B6 alloys by metastable liquid spinodal decomposition
摘要：
采用亚稳态液相调幅分解法可以制备出直径为3~5 mm的Fe 40 Ni 40 P14 B6合金纳米晶锭。采用助熔剂法对Fe 40 Ni 40 P 14 B6合金进行净化处理，获得了大的过冷度。当过冷度Δ T > 260 K时，过冷试样的组织在过冷液态下发生了液态调幅分解。显微组织可以描述为两个相互缠绕的网络，小颗粒分散在其中。对于过冷度Δ T > 290 K，试样的整体显微组织变为粒状形态。小晶粒和大晶粒的平均晶粒尺寸分别为~ 30 nm和~ 80 nm。所制备的样品为饱和磁化强度Bs ~ 0.744T的软磁材料。
英文摘要：
Nanostructured Fe40Ni40P14B6 alloys ingots of diameter 3~5 mm could be synthesised by a metastable liquid state spinodal decomposition method. The molten Fe40Ni40P14B6 alloy was purified by means of the fluxing technique and thus a large undercooling could be achieved. For undercooling Delta T > 260 K, the microstructure of the undercooled specimen had exhibited liquid state spinodal decomposition in the undercooled liquid state. The microstructure could be described as two intertwining networks with small grains dispersed in them. For undercooling Delta T > 290 K, the overall microstructure of the specimen changed into a granular morphology. The average grain sizes of the small and large grains are ~ 30 nm and ~ 80 nm, respectively. These prepared samples are soft magnets with saturation magnetization Bs ~0.744 T.
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