Reduction-Diffusion Preparation of Nd15Fe77B8, NdFe11Ti, NdFe10.5Mo1.5 and NdFe10.75Mo1.25 Alloys for Magnets

Eneida da G. Guilherme; H.R. Hechenberg; José Octavio A. Pascoal

doi:10.4028/www.scientific.net/MSF.530-531.181

Paper Titles

Zr-Rich Phases in Sm(CoFeCuZr)_z Magnets
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The Influence of Si, Ga and Gd Content on the Magnetic Properties of Pr-Fe-Co-B-Nb HDDR Bonded Magnets
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The Influence of Al, Cu and P Content on the Magnetic Properties of PrFeCoBNb-Based HDDR Magnets
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Curie Temperature Determination of Pr₁₄Fe_79.9-xCo_xB₆Nb_0.1 Permanent Magnet Alloys
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Reduction-Diffusion Preparation of Nd₁₅Fe₇₇B₈, NdFe₁₁Ti, NdFe_10.5Mo_1.5 and NdFe_10.75Mo_1.25 Alloys for Magnets
p.181

Sm₂Fe₁₇N_xProduced by Calciothermic Reduction Using Different Iron Powders
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Design of a Machine by Low Cost and the High Performance for Produced Powder Materials
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Preparation of Ta-12.5Si-25B Powders by Mechanical Alloying
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Mechanical Activation of Nb75Al Mixtures Using Shaker and Planetary Ball Mills
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HomeMaterials Science ForumMaterials Science Forum Vols. 530-531Reduction-Diffusion Preparation of Nd15Fe77B8,...

Reduction-Diffusion Preparation of Nd₁₅Fe₇₇B₈, NdFe₁₁Ti, NdFe_10.5Mo_1.5 and NdFe_10.75Mo_1.25 Alloys for Magnets

Abstract:

The calciothermic reduction-diffusion (CRD) process is a alternative preparation route for Nd15Fe77B8, NdFe11Ti, NdFe10.5Mo1.5 and NdFe10.75Mo1.25 alloys, which eliminates the need for long homogenizing heat treatment; in addition, the resulting alloy is already in powder form. We have examined the effect of various processing variables in the preparation of mother alloys. Compacts made of NdCl3, Fe, Ti, Mo and Fe-B powders and Ca granules were heated under argon for different times and temperatures. The alloys as-prepared contained mostly the hard magnetic phase. The NdFe11Ti, NdFe10.75Mo1.25 and NdFe10.5Mo1.5 alloys have been successfully nitrogenated by heating a mixture of powdered alloys with sodium azide (NaN3) at temperatures between 330 and 450 oC.

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Materials Science Forum (Volumes 530-531)

Pages:

181-186

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.530-531.181

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Online since:

November 2006

Authors:

Eneida da G. Guilherme, H.R. Hechenberg, José Octavio A. Pascoal

Keywords:

Hard Magnetic Materials, Intermetallic Compound (IMC), Nitrogenation, Reduction-Diffusion Calciothermic Process

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