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Copyright of Journal of the Chinese Society of Rare Earths is the property of Editorial Department of Journal of the Chinese Society of Rare Earths and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Harbin University of Science & Technology is the property of Journal of Harbin University of Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

By alloying metalloid element, the amorphous forming ability and soft magnetic properties could be improved for the Fe based amorphous and nanocrystalline alloys. In this paper, Fe73.5Si13.5Nb3Cu1B9-xPx (x=0, 3 at%, 6 at%, 9 at%) ribbons were fabricated using the melt spinning technique, and the effect of substitution of B by P on the microstructure and soft magnetic properties have been studied based on the magnetic interaction between elements. It is found that, P addition improves the onset temperature of the primary crystallization and thus the glass forming ability, but reduces the onset temperature of the secondary crystallization and thus its thermal stability. The 3 at% P addition is beneficial for the precipitation of α-Fe and the grain size refinement. After annealed at 525 ℃, the optimal soft magnetic properties are obtained in x=3 at% alloy, meanwhile, the grain size is 9 nm, the coercivity is 0.21 A/m and the effective permeability is higher than that of x=0 alloy. However, P addition decreases the magnetic moment of Fe in the residual amorphous phase and thus the saturation magnetization. [ABSTRACT FROM AUTHOR]

Fe-based amorphous and nanocrystalline alloys have attracted extensive attention due to excellent soft magnetic properties, such as high permeability, low coercivity Hc and low core loss. With the development of power electronic industry, electrical equipment requires miniaturization and energy saving, which requires Fe-based amorphous and nanocrystalline alloys to have higher saturation magnetization Bs and lower Hc.In this paper, Fe76Ga5Ge5B13-xPxCu1(x=0,3,5,7)ribbons were fabricated using the melt spinning technique, and the effect of annealing temperature on the crystallization processes, microstructure and soft magnetic properties have been studied. It was found that, the substitution of B by P deteriorates the glass forming ability of the alloys, but enhance the thermal stability of the secondary crystallization. Besides, the addition of P refine the grain size and reduces coercivity on the one hand, leading to the optimal coercivity of 1.77 A/m in the x=7 ribbon annealed at 425 ℃. On the other hand, the migration of valence electrons from P to Fe decreases the magnetic moment of Fe in the residual amorphous phase and thus saturation magnetization. In addition, when the content of P is higher than 5 at%, the crystal face (200) of the grains near the surface position is parallel to the surface of the ribbon. But for the grains inside the ribbon, it is the crystal face (110) that runs parallel to the surface of the ribbon. [ABSTRACT FROM AUTHOR]