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The microstructure and impact toughness of sintered Nd-Fe-B magnets

Lian Fa-Zeng Hu Zhi-Hua Zhu Ming-Gang Li Wei

The microstructure and impact toughness of sintered Nd-Fe-B magnets

Lian Fa-Zeng, Hu Zhi-Hua, Zhu Ming-Gang, Li Wei
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  • Abstract views:  3291
  • PDF Downloads:  1061
  • Cited By: 0
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  • Received Date:  21 April 2007
  • Accepted Date:  06 June 2007
  • Published Online:  20 February 2008

The microstructure and impact toughness of sintered Nd-Fe-B magnets

  • 1. (1)东北大学材料各向异性与织构教育部重点实验室,沈阳 110004; (2)东北大学材料各向异性与织构教育部重点实验室,沈阳 110004;钢铁研究总院功能材料研究所,北京 100081; (3)钢铁研究总院功能材料研究所,北京 100081

Abstract: The effects of Nb on the microstructure and impact toughness of sintered Nd-Fe-B magnets as well as their inter relation have been investigated. The results show that the addition of Nb improves the microstructure, and increases impact toughness of sintered magnets. When Nb content of the sintered magnets without Co is 15 at%,the maximum impact toughness is obtained. But for the sintered magnets with the Co addition, the variation of impact toughness of the magnets is not obvious, and the magnets have lower impact energy than the magnets with the Co addition. The microstructure of sintered magnets has been studied. It was found that many factors affect the impact toughness of sintered magnets, but the main factor is the width and shape of grain boundary of sintered magnets.

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