Microstructural characteristics of Nd2Fe14B/α-Fe nanocomposite ribbons bearing Nb element

• 作 者: WANG Zhanyong LIU Wenqing ZHOU Bangxin NI Jiansen XU Hui LI Qiang
• 机 构: Department of Materials Engineering, Shanghai Institute of Technology, Shanghai 200235, China;Instit
• 出 处: 稀有金属（英文版）
• 发表日期: 2008年3期
• 关键词: Nd2Fe14B/α-Fe nanocomposite magnet 3DAP magnetic properties

The effects of Nb on the microstructure and magnetic properties of (Nd0.9Dy0.1)9.5Fe79-xCo5NbxB6.5(x=0, 1) nanocomposite magnets were investigated. A fine and uniform microstructure was achieved for the ribbons annealed at 710℃ for 4min, enhancing the interaction coupling between grains and improving the magnetic properties. The results of three-dimensional atom probe (3DAP) indicated that Fe-Nb-B inter granular phase existed at the grain boundaries, suppressing the grain growth during the crystallization process. The coercivity was improved from 224 to 643 kA/m for the modification of the microstructure.