Permanent magnets, and particularly rare earth magnets such as Nd-Fe-B, have attracted much attention because of their magnetic properties. There are two well-established techniques for obtaining sintered bonded Nd-Fe-B magnets. Powder metallurgy is used to obtain high-performance anisotropic To produce either melt-spinning or the hydrogenation, disproportionation, desorption, recombination pro...

Introduction The Advanced Photon Source (APS), as well as other third-generation synchrotron light sources, uses permanent magnets in the insertion devices to produce x-rays for scientific research [1,2]. When placed in a high-energy storage ring, these permanent magnets are subjected to irradiation from synchrotron radiation, high-energy bremsstrahlung, and bremsstrahlung-produced photoneutron...

Scanning electron microscopy, and magnetization measurements reveal that as cast (Nd1 xCex)2Fe14B alloys contain significant amounts of a-Fe that can be dramatically reduced by annealing the alloys at 1000 C for 3 days. The room temperature intrinsic coercivity, Hci, of (Nd0.8Ce0.2)2.2Fe14B melt spun ribbons was found to be 11 kOe, which is ~32e~10% higher in comparison to that of Nd2Fe14B (Hci...

To realize the stability of the passive magnetic robotic system, a novel combination of permanent magnets is proposed. As we know, a single passive magnetic levitation is impossible to suspend all degrees of freedom of a rigid body; this article researches the combination of multiple passive magnetic bearings by the finite element method (FEM) simulation. Through changing the magnetization dire...

Remanence is an important parameter of magnetic property for Nd-Fe-B magnets, and high remanent magnetization a prerequisite high-performance magnets. In this paper, the surface morphology perpendicular to texture orientation direction parallel analyzed by permanent magnets with different compositions. For first time, relationship between remanence magnet degree explained in depth using fractal...