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Science in China Series A: Mathematics

, Volume 45, Issue 4, pp 516–519 | Cite as

Magnetic properties and microstructure of HDDR isotropic Nd-Dy-Fe-Co-B bonded magnets with high coercivity

  • Wei Chen
  • Minggang Zhu
  • Ruwei Gao
  • Wei Pan
  • Wei Li
  • Xiumei Li
Article

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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Copyright information

© Science in China Press 2002

Authors and Affiliations

  • Wei Chen
    • 1
    • 3
  • Minggang Zhu
    • 2
    • 3
  • Ruwei Gao
    • 1
  • Wei Pan
    • 2
  • Wei Li
    • 2
  • Xiumei Li
    • 2
  1. 1.School of Physics and Micro-electronicsShandong UniversityJinanChina
  2. 2.Central Iron and Steel Research InstituteBeijingChina
  3. 3.Physics DepartmentHebei Normal UniversityShijiazhuangChina

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