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Magnetic properties and microstructure of HDDR isotropic Nd-Dy-Fe-Co-B bonded magnets with high coercivity |
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| Authors: | Wei Chen Minggang Zhu Ruwei Gao Wei Pan Wei Li and Xiumei Li |
| Institution: | 1. School of Physics and Micro-electronics, Shandong University, dinan 250100, China;Physics Department, Hebei Normal University, Shijiazhuang 050016, China 2. Central Iron and Steel Research Institute, Beijing 100080, China;Physics Department, Hebei Normal University, Shijiazhuang 050016, China 3. School of Physics and Micro-electronics, Shandong University, dinan 250100, China 4. Central Iron and Steel Research Institute, Beijing 100080, China |
| Abstract: | The effect of small amount of Co and Dy addition on the magnetic properties of HDDR isotropic Nd-Dy-Fe-Co-B bonded magnets was investigated. The experimental results show that the intrinsic coercivity Hcj and the reversible temperature coefficient of remanence of (Nd0.65 Dy0.35)12.5-(Fe0.9Co0.1)81B6.5 magnet were 1.53 MA·m-1(19.3 kOe) and -0.059%/°C (25–155°C), respectively. The high coercivity and low temperature coefficient of the magnet are due to the enhanced anisotropy field, increased Curie temperature and improved microstructure by Dy and Co addition. |
| Keywords: | HDDR technique isotropy magnetic properties microstructure |
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