Exploring the structural evolution of the NdFeB magnets with various carbon contamination in the PIM process
Year: 2026
Type: article
Abstract: The Powder Injection Molding (PIM) process offers the possibility to obtain dense near-net shape NdFeB parts with magnetic properties similar to the conventional powder metallurgy counterparts. Understanding the structural evolution of the magnets with various carbon contamination coming from the organic binders will offer the possibility to improve the process. Here, the evolution of the structure of the NdFeB magnets with various carbon contamination within the PIM process was investigated. It was found that the carbon contaminates the Nd-rich phases forming a NdOxCy phase. For carbon concentrations higher than 5 300 ppm, a tetragonal neodymium carbide phase was formed at the expense of the metallic Nd-dhcp phase. Moreover, 23% of the total carbon was found to interact with the Nd2Fe14B main magnetic phase, forming the Nd2Fe14BxC1-x phase.
Source: Materials Today Physics
Authors: T. Crozier-Bioud, S. Jouen, S. Rolere, V. Nachbaur, M. Ollivier, L. Favergeon, S. Luca
Institutions: Centre National de la Recherche Scientifique, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Laboratoire d’Innovation pour les Technologies des Énergies Nouvelles et les nanomatériaux, Mines Saint-Étienne, Georges Friedel Laboratory, Groupe de Physique des Matériaux, Université de Rouen Normandie, Institut National des Sciences Appliquées Rouen Normandie
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,160
OpenAlex ID: W7124972511