Dy0.5Fe60Pt39.5合金的相转变和磁性能

Phase Transformation and Magnetic Properties of Dy0.5Fe60Pt39.5 Alloy

摘要:

研究了退火时间对Dy0.5Fe60Pt39.5合金结构和磁性能的影响。通过热磁曲线的测量获得了软磁相和硬磁相的居里温度。实验表明：由于退火时间的增长，合金中的短程有序度增加，使无序的面心立方相并不是真正的无序相。合金的矫顽力和剩磁比都是退火时间的函数，最佳的热处理条件是在600 °C退火5 h。根据合金相转变和微结构的变化对磁性能的结果进行了解释。

Abstract:

The effects of the annealing time on the microstructure and magnetic properties of Dy0.5Fe60Pt39. 5 were investigated. X-ray diffraction and M-T data indicated that the disordered face-centered-cubic phase (soft phase) is not truly disordered phase due to an increase in the degree of short-range order with increasing of annealing time. Both the coercivity and remanence ratio of the FePt based alloy are as a function of the annealing time. The optimum heat treatment condition for the alloy is at annealing temperature of 600 °C for 5 h. These results of magnetic properties can be explained on the basis of phase transformation and microstructure of the alloy.