期刊
3D PRINTING AND ADDITIVE MANUFACTURING
卷 9, 期 4, 页码 245-253出版社
MARY ANN LIEBERT, INC
DOI: 10.1089/3dp.2020.0340
关键词
printed NdFeB-bonded magnets; Halbach arrays; PPS polymer NdFeB composite magnets; neutron reflectivity
资金
- Critical Materials Institute, an Energy Innovation Hub - U.S. DOE, Office of Energy Efficiency and Renewable Energy, Advanced Manufacturing Office
- Laboratory Directed Research and Development program of the ORNL
- Scientific User Facilities Division of the U.S. DOE, Office of Science - Basic Energy Science Program, DOE Office of Science [DEAC05-00OR22725]
Halbach arrays, known for their efficiency in generating directed magnetic fields, were printed using additive manufacturing technology for polarized neutron reflectometry. The customized Halbach rings maintained a high level of polarization for neutron beams, which are essential in studying various phenomena in physics, chemistry, and biology. Additive manufacturing was demonstrated to be effective in producing prototype Halbach arrays and preserving magnetic field properties.
Halbach arrays are the most efficient closed structures for generating directed magnetic fields and gradients, and are widely used in various electric machines. We utilized fused deposition modeling-based Big Area Additive Manufacturing technology to print customized, compensated concentric Halbach array rings, using polyphenylene sulfide-bonded NdFeB permanent magnets for polarized neutron reflectometry. The Halbach rings could generate a 0 <= B <= 0.30 T field, while preserving 90% polarization of an axial neutron beam. Polarized neutron beams are used to study a wide range of structural and magnetic phenomena spanning physics, chemistry, and biology. In this study, we demonstrate the effectiveness of additive manufacturing for producing prototype Halbach arrays, characterize their magnetic properties, and generated magnetic fields, and discuss the conservation of neutron beam polarization as a function of magnetic field.
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