Crystallite Size and Magnetic Properties of HDDR Powders Obtained from PrFeCoBNb Alloys

S.C. Silva; José Hélio Duvaizem; R.N. Faria; Hidetoshi Takiishi

doi:10.4028/www.scientific.net/MSF.660-661.308

Paper Titles

Effect of Grain Size on the Coercivity of Sintered NdFeB Magnets
p.284

Optimizing the Heat Treatment of Rare Earth-Transition Metal Sintered Magnets
p.290

The Influence of Praseodymium Content on the Hydrogen Absorption Capability of PrFeCoBNb Magnetic Alloys
p.296

Effect of Variables the HDDR Processing on Magnetic Properties and Microstructure in Permanent Magnets Based on Pr-Fe-B
p.302

Crystallite Size and Magnetic Properties of HDDR Powders Obtained from PrFeCoBNb Alloys
p.308

Effect of the Reinforcement Volume Fraction on Mechanical Alloying of AA2124 – SiC Composite
p.317

High-Energy Mechanical Milling of Ultra-High Molecular Weight Polyethylene (UHMWPE)
p.325

An Investigation on the Mechanical Alloying of TiFe Compound by High-Energy Ball Milling
p.329

The Effect of Mechanical Activation of Elemental Powders on Combustion Synthesis of NbAl₃
p.335

HomeMaterials Science ForumMaterials Science Forum Vols. 660-661Crystallite Size and Magnetic Properties of HDDR...

Crystallite Size and Magnetic Properties of HDDR Powders Obtained from PrFeCoBNb Alloys

Abstract:

The first goal of this work involved the study of HDDR powders obtained from annealed alloys with the general formula: PrxFe77.9-xCo16B6Nb0.1 (x = 12; 12.5; 13; 13.5 and 14). The alloys were processed at desorption / recombination temperature of 840°C. The highest magnetic properties were obtained with 13.5 at. % Pr (Br= 1000mT and µ0iHc= 890mT). The alloy with a minimum praseodymium content (12 at. %) exhibited the lowest magnetic properties (Br= 350mT e iHc= 120mT). The second aim of the work involved the characterization of HDDR powders using X-ray diffraction for phase quantification and mean crystallite sizes determination of the hard magnetic phase. The processed powders were characterized by scanning electron microscopy (SEM).

You might also be interested in these eBooks

View Preview

Info:

Periodical:

Materials Science Forum (Volumes 660-661)

Pages:

308-313

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.660-661.308

Citation:

Cite this paper

Online since:

October 2010

Authors:

S.C. Silva, José Hélio Duvaizem, R.N. Faria, Hidetoshi Takiishi

Keywords:

Crystallite Size, HDDR Magnet, Pr-Fe-B Magnet

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

References

[1] T. Takeshita and R. Nakayama: 10th International Workshop on RE Magnets and their applications, 1989. Proceedings… p.551.

Google Scholar

[2] P. J. McGuiness, X. J. Zhang, X. J. Yin and I. R. Harris: J. Less-Commom Metals Vol. 158 (1990), p.379.

Google Scholar

[3] L. P. Barbosa, H. Takiishi and R. N. Faria: J. Magn. Magn. Mater Vol. 270 (2004), p.291.

Google Scholar

[4] L. P. Barbosa, H. Takiishi, L. F. C. P. Lima and R. N. Faria: J. Magn. Magn. Mater Vol. 285 (2005), p.290.

Google Scholar

[5] S. C. Silva, E. A. Ferreira, R. N. Faria and H. Takiishi: Mat. Science Forum Vols. 591-593 (2008), p.108.

Google Scholar

[6] S. C. Silva, J. H. Duvaizem, L. G. Martinez, M. T. D. Orlando, R. N. Faria and H. Takiishi, Mat. Science Forum Vols. 591-593 (2008), p.42.

DOI: 10.4028/www.scientific.net/msf.591-593.42

Google Scholar

[7] Y. B. Kim and W. Y. Jeung: J. Appl. Phys. Vol. 83 (1) (1998) 6405.

Google Scholar

[8] R. N. Faria, A. J. Williams and I. R. Harris: J. Alloy Compd, Vol. 287 (1999) L10.

Google Scholar

[9] R. N. Faria, A. J. Williams and I. R. Harris: J. Magn. Magn. Mater. Vol. 202 (1999), p.349.

Google Scholar

[10] R. N. Faria, D. N. Brown and I.R. Harris: J. Alloy Compd. Vol. 296 (2000), p.219.

Google Scholar