Evolution of structural and magnetic properties due to nanocrystallization of mechanically milled amorphous Pr-Co-B powders
In this paper, Pr2Co14B permanent magnet powders were prepared by mechanical milling of an arc-melted ingot. X-ray diffraction analysis revealed the presence of the 2:14:1 phase after 1 h of milling which transformed into an amorphous phase with additional milling time. Increasing the milling time a...
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| Veröffentlicht in: | Journal of applied physics 2014-12, Vol.116 (23) |
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| creator | Ucar, Huseyin Nlebedim, Ikenna C. Parans Paranthaman, M. William McCallum, R. |
| description | In this paper, Pr2Co14B permanent magnet powders were prepared by mechanical milling of an arc-melted ingot. X-ray diffraction analysis revealed the presence of the 2:14:1 phase after 1 h of milling which transformed into an amorphous phase with additional milling time. Increasing the milling time also lowered the intrinsic coercivity while the saturation magnetization increased up to 105 emu/g. Differential scanning calorimetry measurements revealed a crystallization temperature of around 560 °C. Upon annealing 30 h of as-milled amorphous powders between 500 and 900 °C, we observed the precipitation of the 2:14:1 phase. Finally, the optimum post-milling annealing temperature was 600 °C with an intrinsic coercivity of 7 kOe and maximum energy product of 6 MGOe. |
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(ORNL), Oak Ridge, TN (United States). Critical Materials Institute (CMI)</creatorcontrib><title>Evolution of structural and magnetic properties due to nanocrystallization of mechanically milled amorphous Pr-Co-B powders</title><title>Journal of applied physics</title><description>In this paper, Pr2Co14B permanent magnet powders were prepared by mechanical milling of an arc-melted ingot. X-ray diffraction analysis revealed the presence of the 2:14:1 phase after 1 h of milling which transformed into an amorphous phase with additional milling time. Increasing the milling time also lowered the intrinsic coercivity while the saturation magnetization increased up to 105 emu/g. Differential scanning calorimetry measurements revealed a crystallization temperature of around 560 °C. Upon annealing 30 h of as-milled amorphous powders between 500 and 900 °C, we observed the precipitation of the 2:14:1 phase. 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(ORNL), Oak Ridge, TN (United States). Critical Materials Institute (CMI)</creatorcontrib><collection>OSTI.GOV - Hybrid</collection><collection>OSTI.GOV</collection><jtitle>Journal of applied physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ucar, Huseyin</au><au>Nlebedim, Ikenna C.</au><au>Parans Paranthaman, M.</au><au>William McCallum, R.</au><aucorp>Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Critical Materials Institute (CMI)</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Evolution of structural and magnetic properties due to nanocrystallization of mechanically milled amorphous Pr-Co-B powders</atitle><jtitle>Journal of applied physics</jtitle><date>2014-12-17</date><risdate>2014</risdate><volume>116</volume><issue>23</issue><issn>0021-8979</issn><eissn>1089-7550</eissn><abstract>In this paper, Pr2Co14B permanent magnet powders were prepared by mechanical milling of an arc-melted ingot. X-ray diffraction analysis revealed the presence of the 2:14:1 phase after 1 h of milling which transformed into an amorphous phase with additional milling time. Increasing the milling time also lowered the intrinsic coercivity while the saturation magnetization increased up to 105 emu/g. Differential scanning calorimetry measurements revealed a crystallization temperature of around 560 °C. Upon annealing 30 h of as-milled amorphous powders between 500 and 900 °C, we observed the precipitation of the 2:14:1 phase. Finally, the optimum post-milling annealing temperature was 600 °C with an intrinsic coercivity of 7 kOe and maximum energy product of 6 MGOe.</abstract><cop>United States</cop><pub>American Institute of Physics (AIP)</pub><oa>free_for_read</oa></addata></record> |
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| ispartof | Journal of applied physics, 2014-12, Vol.116 (23) |
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| source | AIP Journals Complete; Alma/SFX Local Collection |
| subjects | CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY |
| title | Evolution of structural and magnetic properties due to nanocrystallization of mechanically milled amorphous Pr-Co-B powders |
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