In-situ magnetic alignment model for additive manufacturing of anisotropic bonded magnets
Abstract
In this work, we report a mathematical framework which predicts the degree of alignment (DoA) in an in-situ aligned additively manufactured 3D printed bonded magnets. A multiphysics model is developed which couples the harmonious interactions of magnetic particles in a viscous flowing polymer under the presence of an external magnetic field. The hydrodynamic fluid-particle interaction is paired with the magnetophoretic force to predict the particle trajectory and distribution during extrusion through a 3D printer nozzle. Succeeding the force balance, a magnetohydrodynamic torque equilibrium analysis is performed to predict the net-orientation of the magnetic particles as a function of the applied field strength, viscous forces, and particle-to-particle interactions (P2P). Experimental validation of the DoA predictions is performed using 65 vol% Nd-Fe-B+Sm-Fe-N in Nylon12 (DoAexp = 0.620 and DoAtheory = 0.686) and 15 vol% Sm-Co in PLA (DoAexp = 0.830 and DoAtheory = 0.863). A parametric analysis is performed to analyze the effect of operating and design parameters like alignment field strength, magnetic loading fraction, extrusion load, and particle size. The model predicts a competing behavior between particle-fluid and particle-particle interactions under the presence of an applied field. Lastly, the model provides a framework to efficiently predict the DoA in tandem withmore »
- Authors:
-
- Ames Lab., Ames, IA (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- Ames Lab., Ames, IA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1797578
- Report Number(s):
- IS-J-0,507
Journal ID: ISSN 2214-8604
- Grant/Contract Number:
- AC02-07CH11358; AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Additive Manufacturing
- Additional Journal Information:
- Journal Volume: 46; Journal ID: ISSN 2214-8604
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Additive manufacturing; In-situ alignment; Multiphysics model; Degree of alignment prediction; Parametric analysis
Citation Formats
Sarkar, Abhishek, Paranthaman, M. Parans, and Nlebedim, Ikenna C. In-situ magnetic alignment model for additive manufacturing of anisotropic bonded magnets. United States: N. p., 2021.
Web. doi:10.1016/j.addma.2021.102096.
Sarkar, Abhishek, Paranthaman, M. Parans, & Nlebedim, Ikenna C. In-situ magnetic alignment model for additive manufacturing of anisotropic bonded magnets. United States. https://doi.org/10.1016/j.addma.2021.102096
Sarkar, Abhishek, Paranthaman, M. Parans, and Nlebedim, Ikenna C. Wed .
"In-situ magnetic alignment model for additive manufacturing of anisotropic bonded magnets". United States. https://doi.org/10.1016/j.addma.2021.102096. https://www.osti.gov/servlets/purl/1797578.
@article{osti_1797578,
title = {In-situ magnetic alignment model for additive manufacturing of anisotropic bonded magnets},
author = {Sarkar, Abhishek and Paranthaman, M. Parans and Nlebedim, Ikenna C.},
abstractNote = {In this work, we report a mathematical framework which predicts the degree of alignment (DoA) in an in-situ aligned additively manufactured 3D printed bonded magnets. A multiphysics model is developed which couples the harmonious interactions of magnetic particles in a viscous flowing polymer under the presence of an external magnetic field. The hydrodynamic fluid-particle interaction is paired with the magnetophoretic force to predict the particle trajectory and distribution during extrusion through a 3D printer nozzle. Succeeding the force balance, a magnetohydrodynamic torque equilibrium analysis is performed to predict the net-orientation of the magnetic particles as a function of the applied field strength, viscous forces, and particle-to-particle interactions (P2P). Experimental validation of the DoA predictions is performed using 65 vol% Nd-Fe-B+Sm-Fe-N in Nylon12 (DoAexp = 0.620 and DoAtheory = 0.686) and 15 vol% Sm-Co in PLA (DoAexp = 0.830 and DoAtheory = 0.863). A parametric analysis is performed to analyze the effect of operating and design parameters like alignment field strength, magnetic loading fraction, extrusion load, and particle size. The model predicts a competing behavior between particle-fluid and particle-particle interactions under the presence of an applied field. Lastly, the model provides a framework to efficiently predict the DoA in tandem with a functionalized-magnetic 3D printer and allows the user to adjust the operating parameters according to the desired DoA.},
doi = {10.1016/j.addma.2021.102096},
journal = {Additive Manufacturing},
number = ,
volume = 46,
place = {United States},
year = {Wed Jun 09 00:00:00 EDT 2021},
month = {Wed Jun 09 00:00:00 EDT 2021}
}
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