|Title:||3D printing and in situ aligning of anisotropic polymer-bonded magnets||Language:||English||Authors:||Mathauer, Klaus||Keywords:||3d printing; magnets; anisotrop magnet||Advisor:||Süss, Dieter||Issue Date:||2020||Number of Pages:||88||Qualification level:||Diploma||Abstract:||
Additive manufacturing (3D printing) of polymer-bonded isotropic NdFeB magnets was successfully applied at the Vienna University of Technology for the first time . The main goal of this work is to upgrade the 3D printer to manufacture anisotropic magnetic magnets with a locally varying magnetization. Hard-magnetic materials with an uniaxial anisotropy are processed. The aim is to align the magnetic easy axis under an external alignment field during the printing process. When the polymer matrix is plasticized, the magnetic particles can align itself by the force that the external orientation field exerts on the individual particles - this produces an anisotropic sample. Earlier investigations on some of the magnetic compounds designed for additive manufacturing revealed the minimum magnetic flux density for the alignment of the particles . The orientation of the particles in their preferred direction leads to completely new possibilities for the production of magnetic systems.A simulation of the experimental setup is implemented in Comsol. After finding a suitable design, an upgrade of the 3D printer is implemented. Tests are performed on the alignment unit to compare the simulation results with experimental results. Afterwards,test structures are printed, followed by the measurement of magnetic properties in a Vibrating Sample Magnetometer (VSM). The remanence in easy axis is in average approximately 37% higher than in the hard axis for Sproxr10/20p.
|DOI:||10.34726/hss.2020.82641||Library ID:||AC15761012||Organisation:||E138 - Institut für Festkörperphysik||Publication Type:||Thesis
|Appears in Collections:||Hochschulschrift | Thesis|
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