한국분말야금학회:학술대회논문집 (Proceedings of the Korean Powder Metallurgy Institute Conference)

한국분말재료학회 (*구 분말야금학회) (The Korean Powder Metallurgy & Materials Institute)
권호 표지

Influence of $Dy_2O_3$ and Sn on the Structure and Magnetic Properties of NdFeNB Magnets

  • Li, Liya (The State Key Laboratory for Powder Metallurgy, The Central South University) ;
  • Yi, Jianhong (The State Key Laboratory for Powder Metallurgy, The Central South University) ;
  • Peng, Yuan Dong (The State Key Laboratory for Powder Metallurgy, The Central South University)
  • 발행 : 2006.09.24
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초록

Addition of 2.0wt%$Dy_2O_3$ or 0.3wt%Sn proved to be very effective in improving the permanent magnetic properties of NdFeNbB magnets. $Dy_2O_3$ additions result in the increase in the Hci and temperature dependence due to formation of (NdDy)-rich phase and grain refinement of $\Phi$ phase. This improvement of the coercivity stability of the magnets from the addition of Sn is attributed to the smoothing effect of the Sn addition at the grain boundaries. The magnetic properties, the temperature dependence and Curie temperature of NdFeNbB with $Dy_2O_3$ and Sn combined addition were found to be considerably improved.

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