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晶粒尺寸在很大程度上决定了Fe基纳米晶合金的磁学性能,其随退火温度变化的物理机理是纳米晶领域重要的研究内容.研究了初始晶化温度与二次晶化温度之间退火1h Fe基纳米晶合金晶粒尺寸随退火温度的变化,并建立了相应的模型.利用提出的模型分析了该温度范围内Fe基纳米晶合金晶粒尺寸随退火温度升高先减小后增大的物理机制.研究发现,在初始晶化温度与二次晶化温度之间等时退火,当退火温度约为Fe基纳米晶合金熔点的0.6倍时其晶粒尺寸最小.在研究的温度区间内,理论研究结果与实验符合得较好.本研究提供了一种快速获得小晶粒尺寸纳米晶合金的方法.
The grain size largely determines the magnetic properties of Fe-based nanocrystalline alloys, and its physical mechanism of annealing temperature changes is an important study in the field of nanocrystallization.The effects of initial crystallization temperature and secondary crystallization temperature The results show that the grain sizes of the Fe-based nanocrystalline alloys annealed at 1h between annealed and annealed at different temperatures and the corresponding models are established.The grain size of the Fe-based nanocrystalline alloys decreases firstly with the increase of annealing temperature After the increase of the physical mechanism.The study found that the initial crystallization temperature and the second crystallization temperature isochronous annealing, when the annealing temperature is about 0.6 times the melting point of Fe-based nanocrystalline alloy when the grain size is the smallest in the study , The theoretical results are in good agreement with the experiment.The present study provides a rapid method for obtaining nanocrystalline alloys with small grain size.