A5100656732- Magnetic Properties of Alloys
- Magnetic properties of thin films
- Magnetic Properties and Applications
- Magnetic and transport properties of perovskites and related materials
- Hydrogen Storage and Materials
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Rare-earth and actinide compounds
- Metallic Glasses and Amorphous Alloys
- Superconducting Materials and Applications
- Metallurgical and Alloy Processes
- Extraction and Separation Processes
- Crystallography and molecular interactions
- Plasma and Flow Control in Aerodynamics
- Physics of Superconductivity and Magnetism
- Gas Dynamics and Kinetic Theory
- Shape Memory Alloy Transformations
- Advancements in Battery Materials
- Microstructure and Mechanical Properties of Steels
- Microstructure and mechanical properties
- Magnetic Field Sensors Techniques
- Recycling and Waste Management Techniques
- Relativity and Gravitational Theory
- Astro and Planetary Science
- Computational Fluid Dynamics and Aerodynamics
Beijing University of Technology
2015-2024
Hefei Institutes of Physical Science
2018
National University of Defense Technology
2016-2017
University Town of Shenzhen
2014
Tsinghua University
2014
Florida State University
1989
Nd–Fe–B sintered magnets with a giant intrinsic coercivity of 47.1 kOe and high maximum energy product 38.5 MGOe have been prepared via combination conventional sintering techniques novel grain boundary diffusion process. Microstructural observations show that the Nd2Fe14B main phase grains in exhibit core/shell type rare-earth elements distribution, where Tb enriched (Nd,Tb)2Fe14B phases are formed surface regions grains. Magnetic domain indicate these modified strongly restrain nucleation...
Hard magnetic materials based on SmCo5, known for their high coercivity, have found extensive applications in advanced technologies. To further enhance performance, it is advantageous to reduce the particle size slightly below single-domain limit and modify shape a one-dimensional (1D) structure. Here, two strategies were introduced with aim synthesize anisotropic SmCo5 nanostructured powder. The first approach involving electrospinning reduction-diffusion failed generate desired structure,...
Ferromagnetic Co nanowires based on the synergistic effect of shape anisotropy and magnetocrystalline appear to be apt candidates as rare-earth-free permanent magnetic materials. This study systematically investigates angular...
Chemical coating, hot compaction, and deformation techniques have been applied to prepare bulk isotropic anisotropic Nd2Fe14B∕α-Fe nanocomposite magnets. The effect of α-Fe content on the structure magnetic properties magnets were studied. For magnets, remanence (Br) increases as increases, while coercive force (Hci) drops simultaneously. Br rises first, peaking at 2vol% content, then falls Hci significantly for all containing Crystal analysis shows that only with no more than exhibit strong...
Magnetic properties and thermal stability were investigated for the MnBi/NdFeB (MnBi = 0, 20, 40, 60, 80, 100 wt.%) bonded hybrid magnets prepared by spark plasma sintering (SPS) technique. Effect of MnBi content on magnetic was studied. With increasing content, coercivity increases rapidly, while remanence maximum energy product drops simultaneously. Thermal measurement magnet, NdFeB magnet with 20 wt.% indicates that both have a negative temperature coefficient coercivity, has positive...
Given the increasing concern regarding global decline in rare earth reserves and environmental burden from current wet-process recycling techniques, it is urgent to develop an efficient technique for leftover sludge manufacturing process of neodymium–iron–boron (Nd–Fe–B) sintered magnets. In present study, centerless grinding Nd–Fe–B magnet machining was selected as starting material. The subjected a reduction–diffusion (RD) order synthesize recycled neodymium (Nd2Fe14B) powder; during this...
At present, the research on recycling of bonded Nd–Fe–B magnet wastes is primarily conducted at laboratory level. This study presents kilogram-scale waste magnets using a NaOH–ethylene glycol solution. The impact reaction temperature and catalyst concentration process this scale was investigated, regenerated were prepared from recycled magnetic powders. properties powders closely resembled those original products. Additionally, life cycle assessment to analyze production powders, revealing...
Spark plasma sintering technique had been applied to prepare bulk isotropic and anisotropic nanostructured Nd–Fe–B permanent magnets via hot pressing subsequent deformation process. Influences of processing conditions height reduction on the structure magnetic properties were investigated. For deformed magnet with 80% reduction, XRD patterns show dominant (00l) diffraction peaks indicating evident c-axis crystallographic alignment in magnet. Under optimal conditions, exhibits excellent as...
Chemical coating, hot compaction, and deformation techniques have been applied to prepare bulk anisotropic SmCo5/α-Fe nanocomposite magnets. The effects of α-Fe content on the structure magnetic properties magnets were studied. With increase content, both saturation magnetization (Ms) remanence (Mr) rise first, peak at 10 vol. % then fall while coercivity (Hci) drops simultaneously. Crystal analysis shows that exhibit a strong c-axis crystal texture SmCo5 phase, which, however, weakens...
Recently, recycling of severely contaminated Nd–Fe–B sintered magnets sludge had drawn considerable attention due to the concern environmental burden and high cost traditional wet process recycling. In present study, we describe a new technology that utilizes distillation, reduction–diffusion (RD), nanoparticle-doping techniques prepare recycled from in an efficient environmentally friendly way. The was purged first remove both organic impurities nonmagnetic impurities. products were then...
Exchange-coupled magnets are promising candidates for a new generation of permanent magnets. Here, we investigated the effect soft magnetic shell thickness and aspect ratio hard core on properties isolated core/shell cylinder exchange-coupled magnets, as well packing cylindrical array via micromagnetic simulation method. It was found that shape anisotropy contributions to in closely related shell. When is thin, dominated by hard-soft exchange coupling effects, quite limited. relatively...
Significant efforts have been put into the recycling of bulk Nd–Fe–B sintered magnet wastes around world in past decade because are valuable secondary rare-earth resources. There two major facts behind efforts. First, waste magnets contain total content as high more than 30 wt.%, which is higher most natural mines. Second, maintain physical and chemical properties original even with deterioration on surfaces due to corrosion contamination. In this review, various techniques for wastes,...