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用X射线衍射仪(XRD)、振动样品磁强计(VSM)、金相及电子显微镜(SEM)研究了添加微量稀土元素Dy对Fe60.5_xPt39.5Dyx(x=0.5,1.0)合金的组织结构与性能的影响。结果表明:添加了稀土Dy的FePt合金有序无序两相共存的温度范围确保在600~800℃之间,且稀土Dy含量的增加提高了该合金从FCT向FCC的转变温度;低温退火态比高温快淬态得到更高的磁性能,原因是发生交换耦合所致,并对磁转变温度宽化作出了合理的解释。认为稀土Dy的加入可使合金的综合性能获得改善和提高。
The microstructure of Fe60.5_xPt39.5Dyx (x = 0.5, 1.0) alloy with addition of trace rare earth element Dy was investigated by X-ray diffraction (XRD), vibrating sample magnetometer (VSM), metallography and electron microscopy (SEM) And the impact of performance. The results show that the coexistence of ordered and disordered phases of FePt alloy with rare earth Dy is ensured to be between 600 and 800 ℃ and the increase of Dy content increases the transition temperature of the alloy from FCT to FCC. Quenching than high-temperature state to obtain higher magnetic properties, due to the occurrence of exchange-induced coupling, and magnetic transition temperature width made a reasonable explanation. It is considered that the addition of rare earth Dy can improve and improve the overall performance of the alloy.