Influences of Dy_2O_3 Addition on Microstructure and Magnetic Properties of Sintered Nd-Fe-B Magnets AITranslate

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Chinese Library Classification Number:TM273[一般工业技术—材料科学与工程]

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Analysis is made of the influences of addition of different mass fraction of Dy2 Oa powders during milling on density, microstructure, orientation degree and magnetic properties of the sintered Nd-Fe-B mag-net （PrNd） 32. 5 Febal Nb0.65 Cu0.20 Al0.65 B1.15. The results show that with the increase of Dy2 O3 the average grain size of the magnet decreases at first and then rapidly increases, its dens mass fraction, ity slightly clines,and orientation degree gradually rises. Both Br and （BH）max decrease linearly with the increase Dy2O3 dosage while Hcj increases and then decreases. During liquid p sulting from Dy diffusion into the ence microstructure and magnetic linearly, and the squareness of d hase sintering process of the mag primary phase grains and Nd2 O3 properties of the magnet. Adding de-of emagnetization curve increases at first net,both （Nd,Dy）2Fe14 B formation re-formation in grain boundary can influ- appropriate Dy2 O3 is beneficial for im- provement of microstructure, orientation degree and magnetic properties of th fraction of Dy2O3 is 0.8%, the grain size of the magnet reaches the minimum of tion,the surface morphology is regular, and the squareness of demagnetization e magnet the most curve is also When the mass uniform distribu-lso the highest.