Direct-write 3D printing of NdFeB bonded magnets. Issue 1 (2nd January 2018)

• Record Type: Journal Article
• Authors: Compton, Brett Gibson; Kemp, James William; Novikov, Timofei V.; Pack, Robert Cody; Nlebedim, Cajetan I.; Duty, Chad Edward; Rios, Orlando; Paranthaman, M. Parans
• Is Part Of: Materials and manufacturing processes. Volume 33:Issue 1(2018)
• Page Start: 109
• Page End: 113
• Publication Date: 2018-01-02
• Subjects: 3D printing -- bonded magnets -- direct-write -- magnetic properties -- NdFeB; Manufacturing processes -- Periodicals; Materials -- Periodicals; Manufactured Materials; 670.5
• DOI: 10.1080/10426914.2016.1221097
• Languages: English
• ISSNs: 1042-6914

Abstract

ABSTRACT: We report a method to fabricate Nd–Fe–B (NdFeB) bonded magnets of complex shape via extrusion-based additive manufacturing (AM), also known as 3D-printing. We have successfully formulated a 3D-printable epoxy-based ink for direct-write AM with anisotropic MQA NdFeB magnet particles that can be deposited at room temperature. The new feedstocks contain up to 40 vol.% MQA anisotropic NdFeB magnet particles, and they are shown to remain uniformly dispersed in the thermoset matrix throughout the deposition process. Ring, bar, and horseshoe-type 3D magnet structures were printed and cured in air at 100°C without degrading the magnetic properties. This study provides a new pathway for fabricating NdFeB bonded magnets with complex geometry at low temperature, and presents new opportunities for fabricating multifunctional hybrid structures and devices.