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    • NdFeB Sintered Permanent Magnets with Multi-element Alloying

    • Wang Zhanyong

      1 ,

      Lu Bo

      1
    • Issue 9, Pages: 674-677(2008)   

      Published: 2008

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  • Wang Zhanyong, Lu Bo. NdFeB Sintered Permanent Magnets with Multi-element Alloying. [J]. Special Casting & Nonferrous Alloys (9):674-677(2008) DOI:
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Abstract

Microstructures of ingot and sintered Nd31Dy3Fe62.57Nb0.6Co1.2Cu0.3Al0.3B1.03 alloy with multi-element alloying were investigated,especially the distribution of micro-alloying elements in microstructure. There exists obvious radial segregation in the ingot,and dendritic α-Fe phase was found in the center of the ingots. Nb was distributed in the interface of Nd2Fe14B phase as Nb-Fe phase. Cu and Co element have obvious enrichment in the Nd-enriched phase,however,obvious enrichment of Al element in ingot was absent. There are similar regularities for elemental distribution in sintered magnets,however,the degree of elemental enrichment is slightly decreased,in which the grain boundary becomes more straightness after tempering treatment. The magnetic properties of sintered magnets were Br of 1.097T,Hcj of 1 092 kA/m,(BH)max of 220 kj/m3.

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Keywords

Sintered NdFeB Magnets; As-cast Microstructure; Sintered Microstructure; Element Distribution

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Related Institution

School of Materials Science and Engineering,Dalian University of Technology
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