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The increasing global demand on Nd-Fe-B makes rare earth (Re) elements including Nd, and Tb facing long-term criticality due to resource limitation and price, it is important to develop new Re-Fe-B magnets with high content of light rare earths (LRe) such as La and Ce which are more abundant and cheaper.
NdFeB powders are consolidated into nanocrystalline bulk magnets by a near-net-shape process of high-velocity compaction (HVC) at room temperature with no binder employed. The magnets prepared under various conditions, including impact energy, filling weight, mold dimension, and plasticity and size of the starting powders, were investigated. The results showed that the density of as-compacted NdFeB...
In recent years, much attention has been paid to new rare-earth-free magnetic materials to avoid using the expensive and limited availability of rare earths. The Mn-based alloys with high magnetic anisotropy and Curie temperature well above room temperature have been regard as good candidate materials in spintronic devices and rare-earth-free magnets. In which, Mn-Ga binary compounds are such materials...
The difference of rotor magnetic circuit configuration will directly affect the magnetic field distribution, losses and temperature rises of motor. A few papers have been published on the performance comparison of different rotor configurations [1-3]. However, few papers compare losses and temperature rises in various regions of motor with different rotor configurations. In this paper, the performances...
Recently, due to the short supply of rare earth element, there is a great demand in developing the rare-earth-free permanent magnets with giant magnetic anisotropy. Among the rare-earth-free permanent magnetic materials of current interest, MnxGa alloys are potential candidates as permanent magnets [1]. In the MnxGa alloys, the ferromagnetic L10-MnGa phase and ferrimagnetic D022-Mn-3Ga phase are theoretically...
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