(1. 中南大學 粉末冶金國家重點實驗室，長沙 410083；
2. 南昌大學 材料科學與工程學院，南昌 330031)
摘 要: 對非晶Fe92B8條帶進行氮化、均勻化、水淬和時效處理，得到α″-Fe16N2相分布于非晶基體上的納米晶Fe84.6N7.8B7.4條帶。采用化學分析測試納米晶條帶中的氮含量，用X射線衍射(XRD)對相結(jié)構(gòu)進行上分析。結(jié)果表明：制備的納米晶Fe84.6N7.8B7.4條帶中α″-Fe16N2相的平均晶粒尺寸和體積分數(shù)分別為18 nm和54%；納米晶Fe84.6N7.8B7.4條帶的電阻率、飽和磁致伸縮率、飽和磁化強度、矯頑力、初始磁導率和弛豫頻率分別為246 μΩ∙cm、2.52×10−6、2.35T、11.4 A/m、9.1×104和4.1×104 Hz，表明納米晶Fe84.6N7.8B7.4條帶是一種性能優(yōu)良的軟磁材料。
關鍵字: 磁性材料；Fe基磁性材料；Fe84.6N7.8B7.4條帶；納米材料；α″-Fe16N2相；顯微組織
（1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;
2. School of Materials Science and Engineering, Nanchang University, Nanchang 330031, China）
Abstract:Fe84.6N7.8B7.4 nanocrystalline ribbon with α″-Fe16N2 phase embedded in an amorphous matrix was prepared with subsequent nitriding, annealing, quenching and tempering Fe92B8 amorphous ribbon. The nitrogen contents of nanocrystalline ribbon were tested by chemistry analysis, and the phase compositions were measured by XRD. The results show that the average grain size and the volume fraction of the α″-Fe16N2 phase are 18 nm and 54%, respectively. The prepared sample exhibits an electrical resistivity of 246 μΩ∙cm, a saturation magnetostriction of 2.52×10−6, a saturation magnetization of 2.35T, a coercive force of 11.4 A/m, an initial permeability of 9.1×104 and a relaxation frequency of 4.1×104Hz. The good soft magnetic properties show that the nanocrystalline ribbon with α″-Fe16N2 nanocrystallites embedded in amorphous matrix is a good candidate for soft magnetic materials.
Key words: magnetic material; Fe-based magnetic material; Fe84.6N7.8B7.4 ribbon; nanomaterial;α″-Fe16N2 phase; microstructures
