Development of NdFeB Magnet through Hydrogen Decrepitation

S. Akhtar; Ali Haider; Z. Ahmad; M. Farooque

doi:10.4028/www.scientific.net/KEM.442.263

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Effect of Thermal Treatment on Coercivity of SmCo₅ Sintered Magnets
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Microstructural and Electrochemical Characterization of Ni/Ti₂N Composite Coating for Sintered NdFeB Permanent Magnets
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Development of NdFeB Magnet through Hydrogen Decrepitation
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The Growth and Characterization of the Cerium Contained Inorganic Halide Scintillators
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HomeKey Engineering MaterialsKey Engineering Materials Vol. 442Development of NdFeB Magnet through Hydrogen...

Development of NdFeB Magnet through Hydrogen Decrepitation

Abstract:

Neodymium based magnets are the powerful permanent magnet of today. This paper will discuss iron based rare earth magnets. NdFeB sintered magnet material has been developed. The magnets are produced by powder metallurgy route involving hydrogen decrepitation technique for making fine powder. After melting and casting, the NdFeB alloy is subject to hydrogen atmosphere. Hydrogen slowly absorbs into the solid alloy and makes it brittle, which upon milling becomes fine powder. Hydrogen is then removed by placing the powder at temperature around 800°C under vacuum. Then the powders are pressed under isostatic conditions and sintered at temperature range of 1020–1050°C. Post sintering is done at 800°C and 580°C followed by quenching. Energy product in the range of 8 MGOe is achieved.

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Periodical:

Key Engineering Materials (Volume 442)

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263-267

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.442.263

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Online since:

June 2010

Authors:

S. Akhtar, Ali Haider, Z. Ahmad, M. Farooque

Keywords:

Hydrogen Decrepitation, Magnet, NdFeB

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