Grain Interface Modification and Magnetic Properties of Nd–Fe–B Sintered Magnets

スポンサーリンク

概要

• 論文の詳細を見る

• Effective grain interface modification was conducted to increase the coercivity of Nd–Fe–B sintered magnets without degrading their magnetic properties seriously. The surface of magnet pieces ($3.0\times 3.0\times 2.8$ mm3) was uniformly coated with a Dy or Tb metal film, and then each metal was introduced inside the magnets through the Nd-rich grain boundary regions for enriching them on the surface around the Nd2Fe14B grain particles. The coercivities of the Dy- and Tb-metal-treated magnets ($H_{\text{cJ}} = 1.45$ and 1.81 MA/m, respectively) were considerably improved compared with that of the untreated magnet ($H_{\text{cJ}} = 0.98$ MA/m), suggesting that the aligned magnetic domain structure was effectively stabilized by such a Dy- or Tb-enriched interface around the Nd2Fe14B grain particles.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2008-10-25

著者

• Suzuki Shunji

  The Center for Advanced Science and Innovation, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan

• Machida Ken-ichi

  The Center for Advanced Science and Innovation, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan

• Li Deshan

  The Center for Advanced Science and Innovation, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan

• Kawasaki Takashi

  The Center for Advanced Science and Innovation, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan

関連論文

• Grain Boundary Phase Formation and Magnetic Properties of NdFeB/Nd Multilayered Films
• Grain Interface Modification and Magnetic Properties of Nd–Fe–B Sintered Magnets

スポンサーリンク