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采用单辊快淬法制备Fe79Zr9B12和Fe76Zr9B15非晶合金薄带,并对两合金进行不同温度下热处理。利用差热分析仪(DTA)、X射线衍射仪(XRD)和振动样品磁强计(VSM)研究Fe79Zr9B12合金和Fe76Zr9B15合金的晶化行为和磁性能。结果表明,Fe79Zr9B12合金和Fe76Zr9B15合金的晶化激活能分别为404.42 kJ/mol和370.75 kJ/mol。晶化初期,有α-Mn型相和α-Fe相从Fe79Zr9B12非晶合金基体中析出,Fe23B6型相和α-Fe相从Fe76Zr9B15非晶合金基体中析出。α-Mn型相和Fe23B6型相均为亚稳相,进一步高温热处理后,α-Mn型相转变为α-Fe相,Fe23B6型相转变为α-Fe相、Fe2B相和Fe3B相。Fe79Zr9B12合金的矫顽力(Hc)在600℃退火后突然增大,继续高温退火,Hc下降;Fe76Zr9B15合金的Hc随着退火温度的升高持续增大。两种合金矫顽力随退火温度的变化与退火后合金的微观结构密切相关。
The Fe79Zr9B12 and Fe76Zr9B15 amorphous alloy ribbons were prepared by single roll rapid quenching method, and the two alloys were heat treated at different temperatures. The crystallization behavior and magnetic properties of Fe79Zr9B12 alloy and Fe76Zr9B15 alloy were investigated by differential thermal analyzer (DTA), X-ray diffraction (XRD) and vibrating sample magnetometer (VSM). The results show that the crystallization activation energies of Fe79Zr9B12 alloy and Fe76Zr9B15 alloy are 404.42 kJ / mol and 370.75 kJ / mol, respectively. In the early stage of crystallization, α-Mn phase and α-Fe phase precipitated from Fe79Zr9B12 amorphous alloy matrix, and Fe23B6 phase and α-Fe phase precipitated from Fe76Zr9B15 amorphous alloy matrix. Both α-Mn phase and Fe23B6 phase are metastable phases. After further high temperature heat treatment, α-Mn phase changes to α-Fe phase and Fe23B6 phase changes to α-Fe phase, Fe2B phase and Fe3B phase. The coercive force (Hc) of Fe79Zr9B12 alloy suddenly increases after annealed at 600 ℃, and continues to be annealed at high temperature, Hc decreases. The Hc of Fe76Zr9B15 alloy increases with the increase of annealing temperature. The coercive force of the two alloys with the annealing temperature is closely related to the microstructure of the alloy after annealing.