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采用熔体快淬法(铜辊速度为20m/s)制备Y1.7Er0.3Fe17快淬带,通过X射线衍射仪、振动样品磁强计(VSM)和三维原子探针(3DAP)对样品的晶体结构、磁熵变和原子在三维空间中分布情况进行研究。结果表明,Y1.7Er0.3Fe17快淬带具有菱方Th2Zn17型结构,与标准PDF卡片(48-1454)相比较,Y2Fe17主相晶胞体积略减小;样品的居里温度在308K附近,磁场变化为1.5T,样品的最大磁熵变值为2.10J·kg-1·K-1;Fe在晶界处含量略有降低,其它区域内,Y、Er和Fe3种原子均匀分布在三维空间中。
Y1.7Er0.3Fe17 quenching zone was prepared by melt quenching method (copper roll speed was 20m / s). The quenching zone of sample was characterized by X-ray diffractometer, vibrating sample magnetometer (VSM) and three-dimensional atom probe Crystal structure, magnetic entropy change and atomic distribution in three-dimensional space. The results show that the Y1.7Er0.3Fe17 quenching zone has a rhombus Th2Zn17 structure. Compared with the standard PDF card (48-1454), the volume of the Y2Fe17 main phase unit cell slightly decreases. The Curie temperature of the sample is around 308K. The magnetic field The maximum magnetic entropy change of sample is 2.10J · kg-1 · K-1 and the content of Fe decreases slightly in the grain boundaries. In other regions, the Y, Er and Fe atoms are uniformly distributed in three-dimensional space in.