Advancing Neodymium Permanent Magnets with Laser Powder Bed Fusion Technology: A Comprehensive Review of Process-structure-property Relationship

Abstract

This comprehensive review article thoroughly examines the promising prospects of utilizing laser powder bed fusion (LPBF) technology in the manufacturing of neodymium (NdFeB) permanent magnets (PM). Providing an in-depth analysis, the paper covers critical aspects including processing, material feedstock, microstructural characteristics, performance metrics, and diverse applications of NdFeB PM within various industries. The discussion meticulously explores the impacts of LPBF process parameters and optimization strategies. In the section dedicated to the future outlook, recent advancements in topology optimization, multi-material printing, and potential enhancements in magnetic properties through alloying additions are thoughtfully addressed. In addition, the review also underscores the significance of expiring patents in the realm of NdFeB manufacturing, contributing to a broad understanding of the technological landscape. Through this wealth of information, this article aims to serve as an invaluable resource for both researchers and industry professionals by not only fostering the further advancements in this field but also to facilitate the expansion of their applications across a spectrum of fields, promising a positive trajectory for the future of this technology.