Evolution of structural and magnetic properties due to nanocrystallization of mechanically milled amorphous Pr-Co-B powders

Ucar, Huseyin; Nlebedim, Ikenna C.; Parans Paranthaman, M.; William McCallum, R.

doi:10.1063/1.4904359

Title: Evolution of structural and magnetic properties due to nanocrystallization of mechanically milled amorphous Pr-Co-B powders

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.

Authors:

Ucar, Huseyin ^[1]; Nlebedim, Ikenna C. ^[2]; Parans Paranthaman, M. ^[1]; William McCallum, R. ^[2]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Ames Lab., Ames, IA (United States)

Publication Date:: Wed Dec 17 00:00:00 EST 2014

Research Org.:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Critical Materials Institute (CMI)

Sponsoring Org.:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Advanced Manufacturing Office

Contributing Org.:: Ames Lab., Ames, IA (United States)

OSTI Identifier:: 1286721

Alternate Identifier(s):: OSTI ID: 1420596

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Applied Physics

Additional Journal Information:: Journal Volume: 116; Journal Issue: 23; Journal ID: ISSN 0021-8979

Publisher:: American Institute of Physics (AIP)

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats


                    Ucar, Huseyin, Nlebedim, Ikenna C., Parans Paranthaman, M., and William McCallum, R. Evolution of structural and magnetic properties due to nanocrystallization of mechanically milled amorphous Pr-Co-B powders.  United States: N. p., 2014. 
Web.  doi:10.1063/1.4904359.

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                    Ucar, Huseyin, Nlebedim, Ikenna C., Parans Paranthaman, M., & William McCallum, R. Evolution of structural and magnetic properties due to nanocrystallization of mechanically milled amorphous Pr-Co-B powders.  United States.  https://doi.org/10.1063/1.4904359

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                    Ucar, Huseyin, Nlebedim, Ikenna C., Parans Paranthaman, M., and William McCallum, R. Wed .  
"Evolution of structural and magnetic properties due to nanocrystallization of mechanically milled amorphous Pr-Co-B powders".  United States.  https://doi.org/10.1063/1.4904359.  https://www.osti.gov/servlets/purl/1286721.

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@article{osti_1286721,

  title        = {Evolution of structural and magnetic properties due to nanocrystallization of mechanically milled amorphous Pr-Co-B powders},

  author       = {Ucar, Huseyin and Nlebedim, Ikenna C. and Parans Paranthaman, M. and William McCallum, R.},

  abstractNote = {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.},

  doi          = {10.1063/1.4904359},

  journal      = {Journal of Applied Physics},

  number       = 23,

  volume       = 116,

  place        = {United States},

  year         = {Wed Dec 17 00:00:00 EST 2014},

  month        = {Wed Dec 17 00:00:00 EST 2014}

}

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Works referencing / citing this record:

Binder Jetting: A Novel NdFeB Bonded Magnet Fabrication Process
journal, April 2016

Paranthaman, M. Parans; Shafer, Christopher S.; Elliott, Amy M.
JOM, Vol. 68, Issue 7
DOI: 10.1007/s11837-016-1883-4

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Title: Evolution of structural and magnetic properties due to nanocrystallization of mechanically milled amorphous Pr-Co-B powders

Abstract

Citation Formats

Mechanical alloying and milling journal, January 2001

Magnetic hardening of Nd 2 Co 1 4 B journal, April 1988

Effect of mechanical milling on the structure and magnetic properties of journal, September 1996

Studies of sintered MRE-Fe-B magnets by DyF 3 addition or diffusion treatment (MRE = Nd + Y + Dy) journal, April 2012

Dysprosium-saving improvement of coercivity in Nd-Fe-B sintered magnets by Dy 2 S 3 additions journal, April 2011

Spin arrangements in R2Co14B compounds (R = rare earth) journal, November 1986

Magnetic properties of a Nd–Fe–B sintered magnet with Dy segregation journal, April 2009

Grain boundary structure and chemistry of Dy-diffusion processed Nd–Fe–B sintered magnets journal, May 2010

Increase of Coercivity and Composition Distribution in Fluoride-Diffused NdFeB Sintered Magnets Treated by Fluoride Solutions journal, November 2010

Studies of New YDy-Based<tex>$hboxR_2hboxFe_14hboxB$</tex>Magnets for High Temperature Performance<tex>$(hboxR=hboxY+hboxDy+hboxNd)$</tex> journal, July 2004

Structure and magnetic properties of cobalt-rich Pr-Co-B alloys journal, December 1988

Magnetic hardening of the Pr2Co14B-based rapidly quenched alloys journal, July 1993

Magnetic properties of R<inf>2</inf>Co<inf>14</inf>B (R = rare earth) journal, September 1987

Magnetic and Microstructural Characteristics of a DyF$_{3}$ Dip-Coated Nd-Fe-B Sintered Magnet journal, July 2013

Hard magnetic properties of Nd‐Co‐B materials journal, August 1988

Magnetic hardening of Pr 2 Co 1 4 B journal, November 1988

Liquidus projection surface and isothermal section at 1000 °C of the Co-Pr-B (Co-rich) ternary phase diagram* journal, February 1993

Magnetic and structural investigations on substituted Pr2Co17-xTx systems (T= Fe, Mn, Cr, Cu and Al) journal, January 1984

Mechanically alloyed isotropic and anisotropic Nd‐Fe‐B magnetic material journal, November 1988

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Binder Jetting: A Novel NdFeB Bonded Magnet Fabrication Process journal, April 2016

Mechanical alloying and milling
journal, January 2001

Magnetic hardening of Nd ₂ Co ₁ ₄ B
journal, April 1988

Effect of mechanical milling on the structure and magnetic properties of
journal, September 1996

Studies of sintered MRE-Fe-B magnets by DyF ₃ addition or diffusion treatment (MRE = Nd + Y + Dy)
journal, April 2012

Dysprosium-saving improvement of coercivity in Nd-Fe-B sintered magnets by Dy ₂ S ₃ additions
journal, April 2011

Spin arrangements in R2Co14B compounds (R = rare earth)
journal, November 1986

Magnetic properties of a Nd–Fe–B sintered magnet with Dy segregation
journal, April 2009

Grain boundary structure and chemistry of Dy-diffusion processed Nd–Fe–B sintered magnets
journal, May 2010

Increase of Coercivity and Composition Distribution in Fluoride-Diffused NdFeB Sintered Magnets Treated by Fluoride Solutions
journal, November 2010

Studies of New YDy-Based<tex>$hboxR_2hboxFe_14hboxB$</tex>Magnets for High Temperature Performance<tex>$(hboxR=hboxY+hboxDy+hboxNd)$</tex>
journal, July 2004

Structure and magnetic properties of cobalt-rich Pr-Co-B alloys
journal, December 1988

Magnetic hardening of the Pr2Co14B-based rapidly quenched alloys
journal, July 1993

Magnetic properties of R<inf>2</inf>Co<inf>14</inf>B (R = rare earth)
journal, September 1987

Magnetic and Microstructural Characteristics of a DyF$_{3}$ Dip-Coated Nd-Fe-B Sintered Magnet
journal, July 2013

Hard magnetic properties of Nd‐Co‐B materials
journal, August 1988

Magnetic hardening of Pr ₂ Co ₁ ₄ B
journal, November 1988

Liquidus projection surface and isothermal section at 1000 °C of the Co-Pr-B (Co-rich) ternary phase diagram*
journal, February 1993

Magnetic and structural investigations on substituted Pr2Co17-xTx systems (T= Fe, Mn, Cr, Cu and Al)
journal, January 1984

Mechanically alloyed isotropic and anisotropic Nd‐Fe‐B magnetic material
journal, November 1988

Improved energy product in grained aligned and sintered MRE2Fe14B magnets (MRE=Y+Dy+Nd)
journal, May 2010

Binder Jetting: A Novel NdFeB Bonded Magnet Fabrication Process
journal, April 2016