Philipp Gabriel, Varatharaja Nallathambi, Jianing Liu, Franziska Staab, Timileyin David Oyedeji, Yangyiwei Yang, Nick Hantke, Esmaeil Adabifiroozjaei, Oscar Recalde-Benitez, Leopoldo Molina-Luna, Ziyuan Rao, Baptiste Gault, Jan T Sehrt, Franziska Scheibel, Konstantin Skokov, Bai-Xiang Xu, Karsten Durst, Oliver Gutfleisch, Stephan Barcikowski, Anna Rosa Ziefuss
{"title":"通过对粉末原料进行纳米改性提高 3D 打印硬磁体的矫顽力。","authors":"Philipp Gabriel, Varatharaja Nallathambi, Jianing Liu, Franziska Staab, Timileyin David Oyedeji, Yangyiwei Yang, Nick Hantke, Esmaeil Adabifiroozjaei, Oscar Recalde-Benitez, Leopoldo Molina-Luna, Ziyuan Rao, Baptiste Gault, Jan T Sehrt, Franziska Scheibel, Konstantin Skokov, Bai-Xiang Xu, Karsten Durst, Oliver Gutfleisch, Stephan Barcikowski, Anna Rosa Ziefuss","doi":"10.1002/advs.202407972","DOIUrl":null,"url":null,"abstract":"<p><p>The demand for strong, compact permanent magnets essential for the energy transition drives innovation in magnet manufacturing. Additive manufacturing, particularly Powder Bed Fusion of metals using a laser beam (PBF-LB/M), offers potential for near-net-shaped Nd-Fe-B permanent magnets but often falls short compared to conventional methods. A less explored strategy to enhance these magnets is feedstock modification with nanoparticles. It is demonstrated that modifying a Nd-Fe-B-based feedstock with 1 wt.% Ag nanoparticles boost the coercivity of the magnets to a record value of 935 ± 6 kA m<sup>-1</sup> without further post-processing or heat treatments. Suitable volumetric energy densities for the PBF-LB/M process are determined using finite element simulations predicting melt pool behavior and part density. Microstructural analyses reveal finer grain sizes and more equiaxed nanocrystalline structures due to the modification. Atom probe tomography identifies three phases in the Ag-modified samples, with Ag forming nanophase regions with rare-earth elements near the amorphous Zr-Ti-B-rich intergranular phase, potentially decoupling the Nd<sub>2</sub>Fe<sub>14</sub>B primary phase. The study shows that superior magnetic properties primarily result from microstructure modification rather than part density. These findings highlight inventive material design approaches via feedstock surface modification to achieve superior magnetic performance in additively manufactured Nd-Fe-B magnets.</p>","PeriodicalId":117,"journal":{"name":"Advanced Science","volume":null,"pages":null},"PeriodicalIF":14.3000,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Boosting Coercivity of 3D Printed Hard Magnets through Nano-Modification of the Powder Feedstock.\",\"authors\":\"Philipp Gabriel, Varatharaja Nallathambi, Jianing Liu, Franziska Staab, Timileyin David Oyedeji, Yangyiwei Yang, Nick Hantke, Esmaeil Adabifiroozjaei, Oscar Recalde-Benitez, Leopoldo Molina-Luna, Ziyuan Rao, Baptiste Gault, Jan T Sehrt, Franziska Scheibel, Konstantin Skokov, Bai-Xiang Xu, Karsten Durst, Oliver Gutfleisch, Stephan Barcikowski, Anna Rosa Ziefuss\",\"doi\":\"10.1002/advs.202407972\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>The demand for strong, compact permanent magnets essential for the energy transition drives innovation in magnet manufacturing. Additive manufacturing, particularly Powder Bed Fusion of metals using a laser beam (PBF-LB/M), offers potential for near-net-shaped Nd-Fe-B permanent magnets but often falls short compared to conventional methods. A less explored strategy to enhance these magnets is feedstock modification with nanoparticles. It is demonstrated that modifying a Nd-Fe-B-based feedstock with 1 wt.% Ag nanoparticles boost the coercivity of the magnets to a record value of 935 ± 6 kA m<sup>-1</sup> without further post-processing or heat treatments. Suitable volumetric energy densities for the PBF-LB/M process are determined using finite element simulations predicting melt pool behavior and part density. Microstructural analyses reveal finer grain sizes and more equiaxed nanocrystalline structures due to the modification. Atom probe tomography identifies three phases in the Ag-modified samples, with Ag forming nanophase regions with rare-earth elements near the amorphous Zr-Ti-B-rich intergranular phase, potentially decoupling the Nd<sub>2</sub>Fe<sub>14</sub>B primary phase. The study shows that superior magnetic properties primarily result from microstructure modification rather than part density. 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Boosting Coercivity of 3D Printed Hard Magnets through Nano-Modification of the Powder Feedstock.
The demand for strong, compact permanent magnets essential for the energy transition drives innovation in magnet manufacturing. Additive manufacturing, particularly Powder Bed Fusion of metals using a laser beam (PBF-LB/M), offers potential for near-net-shaped Nd-Fe-B permanent magnets but often falls short compared to conventional methods. A less explored strategy to enhance these magnets is feedstock modification with nanoparticles. It is demonstrated that modifying a Nd-Fe-B-based feedstock with 1 wt.% Ag nanoparticles boost the coercivity of the magnets to a record value of 935 ± 6 kA m-1 without further post-processing or heat treatments. Suitable volumetric energy densities for the PBF-LB/M process are determined using finite element simulations predicting melt pool behavior and part density. Microstructural analyses reveal finer grain sizes and more equiaxed nanocrystalline structures due to the modification. Atom probe tomography identifies three phases in the Ag-modified samples, with Ag forming nanophase regions with rare-earth elements near the amorphous Zr-Ti-B-rich intergranular phase, potentially decoupling the Nd2Fe14B primary phase. The study shows that superior magnetic properties primarily result from microstructure modification rather than part density. These findings highlight inventive material design approaches via feedstock surface modification to achieve superior magnetic performance in additively manufactured Nd-Fe-B magnets.
期刊介绍:
Advanced Science is a prestigious open access journal that focuses on interdisciplinary research in materials science, physics, chemistry, medical and life sciences, and engineering. The journal aims to promote cutting-edge research by employing a rigorous and impartial review process. It is committed to presenting research articles with the highest quality production standards, ensuring maximum accessibility of top scientific findings. With its vibrant and innovative publication platform, Advanced Science seeks to revolutionize the dissemination and organization of scientific knowledge.