Suitable Hydrogen Pressure Induced Anisotropy in HDDR-Treated Pr-Fe-B Powders

Guang Bing Han; Shuang Fu; Min Liu; Ru Wei Gao

doi:10.4028/www.scientific.net/AMR.625.328

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Suitable Hydrogen Pressure Induced Anisotropy in HDDR-Treated Pr-Fe-B Powders
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Suitable Hydrogen Pressure Induced Anisotropy in HDDR-Treated Pr-Fe-B Powders

Abstract:

Anisotropic Pr12.5Fe72.5Co6Cr2B7 magnetic powders are obtained by varying the desorption H2-pressure of the hydrogenation disproportionation desorption recombination (HDDR) process. The magnetic powders with a desorption H2-pressure of 30 kPa have the magnetic properties of Br =0.96 T, iHc=8.2 kOe and Br/Bs =0.78, whereas the magnetic powders obtained with a higher and a lower desorption H2-pressure are isotropic. A distinct lamella crystal is observed in the 30 kPa desorption H2-pressure products and may be related to the anisotropy in the HDDR-treated powders. It is believed that the desorption H2-pressure has great effect on the formation of crystal texture in the HDDR Pr-Fe-B powders.

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Periodical:

Advanced Materials Research (Volume 625)

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328-331

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https://doi.org/10.4028/www.scientific.net/AMR.625.328

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December 2012

Authors:

Guang Bing Han, Shuang Fu, Min Liu, Ru Wei Gao

Keywords:

Anisotropy, Degree of Anisotropy, HDDR Magnetic Powders, Hydrogen Pressure

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