Paper Title:
The Effect of Cu, P, Ga and Gd on Microstructure and Magnetic Properties in the PrFeCoBNb HD Sintered Magnets
  Abstract

An evaluation of the effect of alloying elements on the microstructure and magnetic properties of Pr15FebalCo8B7Nb0.05Mx (M = Cu, P, Gd and Ga; 0 ≤ x ≤ 0.25) sintered magnets has been carried out. A mixture of alloys and the high-energy milling technique have been used to prepare the magnets. The alloying elements have influenced the remanence, intrinsic coercivity and particularly the squareness factor (SF). Phosphorus addition improved (BH)max (254 kJm-3 ) and SF around 10% (0.89). The same improvement addition on intrinsic coercivity was observed with Gallium (1100mT) compared to the standard composition Pr15FebalCo8B7Nb0.05 (1000mT) magnet. Comparisons between the squareness factors obtained using the J×μ0H curve profile (SF), the estimated (sf) using microstructural parameters and Sf using a (BH)max and Br correlation have also been carried out.

  Info
Periodical
Materials Science Forum (Volumes 660-661)
Edited by
Lucio Salgado and Francisco Ambrozio Filho
Pages
273-278
DOI
10.4028/www.scientific.net/MSF.660-661.273
Citation
T. Mendes, S.C. Silva, E.A. Périgo, R. N. de Faria, H. Takiishi, "The Effect of Cu, P, Ga and Gd on Microstructure and Magnetic Properties in the PrFeCoBNb HD Sintered Magnets", Materials Science Forum, Vols. 660-661, pp. 273-278, 2010
Online since
October 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: J.D. Angelo, C.C. Motta, Luzinete Pereira Barbosa, Hidetoshi Takiishi, Isolda Costa, Rubens Nunes de Faria
Abstract:The hydrogenation decrepitation process was employed to produce sintered magnets using a mixture of two alloys. The effect of niobium and...
96
Authors: E.A. Périgo, E.P. Soares, Hidetoshi Takiishi, C.C. Motta, Rubens Nunes de Faria
Abstract:Roller-ball milling (RBM) or planetary ball milling (PBM) have been used together with the hydrogen decrepitation (HD) process to produce...
114
Authors: L.Q. Yu, Y.P. Zhang, Q.T. Fu
Abstract:Element boron played an important role on magnetic properties and corrosion resistance of high energy density NdFeB products. The magnets...
1043
Authors: Qiong Zhen Liu, Lan Ting Zhang, Ai Dang Shan, Jian Sheng Wu, Matahiro Komuro
Abstract:Two sintered magnets Nd15Dy1.2Fe77Al0.8B6 and Nd22Fe71B7 were modified by intergranular additions of Si3N4. The remanence as well as...
733
Authors: Peng Yue Zhang, Hong Liang Ge, Min Xiang Pan, Qiong Wu, Hang Fu Yang, Zhi Wei Jiao, Jie Gong, Xiao Ling Peng
Abstract:The effects of Zr addition on the microstructure and magnetic properties of the sintered NdFeB magnets were investigated by X-ray diffraction...
751