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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 6    No. 1    March 1996

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(Nd0.9DYo. l)16Co5Fe70Nb2B7 PERMANENTMAGNETIC ALLOY AND BEHAVIOUR OF Nb
Pan Shuming1,Pan Feng2,Ma Ruzhang3

1.General Research Institute of Non-ferrous Metalr,Beijing 100088;
2.Beijing Tape Recorder Factory,Beijing 100080;
3.University of Science and Terhnology Beijing,Beijing 100083

Abstract:The magnetic properties of (Nd0.9Dy0.1)16Co5Fe70Nb2B7 Permanent magnetic allay pre-pared by powder metallurgy are:Br=1. 08T, iHc=1 620kA/m,(BH)max=208k]/m3.  The behaviour of Nb in this alloy was studied by joint methods of dynamic observation by high voltage electron micro-scope (HVEM) and Mossbauer effects.  With Nb and Co substituting parts of Fe and adding a little Dy,practical magnetic alloy with excellent properties can he obtained. The thermal stability of it is 80℃ higher than that of ternary Nd-Fe-B magnet. The study shows that adding Nh into Vd-Fe-B can make the intrinsic coercivity appear peak value at about Nb = 2%(in mole fraction)Nb mainly enters intoNd-rich and B-rich phases,a little into Nd2Fe14B phase.

 

Key words: (Nd0.9Dy0.1)16Co5Fe70Nb2B7,   permanent magnetic allay  magnetic properties

ISSN 1672-7029
CN 43-1423/U

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