Effect of metallic Nd on the decomposition behavior of Nd6(Fe, Co)13Ga phase in hot-deformed Nd-Fe-B magnet. (June 2022)

• Record Type: Journal Article
• Authors: Zhang, Tieqiao; Xing, Wandong; Chen, Fugang; Zhang, Lanting; Yu, Rong
• Is Part Of: Intermetallics. Volume 145(2022)
• Publication Date: 2022-06
• Subjects: Hot-deformed Nd-Fe-B -- Nd6Fe13Ga phase -- Decomposition mechanism -- Nd5Ga3 phase -- Nd3Co phase; Intermetallic compounds -- Metallography -- Periodicals; Metallic glasses -- Periodicals; Composés intermétalliques -- Métallographie -- Périodiques; 669.94
• DOI: 10.1016/j.intermet.2022.107558
• Languages: English
• ISSNs: 0966-9795

Abstract

Abstract: The effect of metallic Nd on the decomposition behavior of Nd6 (Fe, Co)13 Ga phase in hot-deformed Nd-Fe-B magnet was investigated. The block-shaped Nd6 (Fe, Co)13 Ga phase in powder flake interfaces of hot-deformed magnet almost decomposed when the metallic Nd diffusion process was performed at 675 °C for 30 min. Detailed STEM and corresponding EDS analyses found that three different types of intergranular phases, Nd5 Ga3, Nd3 Co and nano-sized Nd6 Fe13 Ga, existed in the Nd-diffused magnet, which indicated a new decomposition mechanism for the Nd6 (Fe, Co)13 Ga phase. A coupling reaction between the metallic Nd and Nd6 (Fe, Co)13 Ga phases was designed to confirm the experimental results in the hot-deformed sample after Nd diffusion. Graphical abstract: Image 1 Highlights: The decomposition behavior of the Nd6 (Fe, Co)13 Ga phase in hot-deformed Nd-Fe-B magnet was investigated. Intergranular phases Nd5 Ga3, Nd3 Co and nano-sized Nd6 Fe13 Ga were observed in Nd-diffused hot-deformed Nd-Fe-B magnet. It provides a new idea for the design of nano-sized Nd6 Fe13 Ga phase.