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Title: Comparison of microstructure and magnetic properties of gas-atomized and melt-spun MRE-Fe-Co-M-B (MRE=Y+Dy+Nd,M=Zr+TiC)

Abstract

An MRE{sub 2}(Fe,Co){sub 14}B alloy with Zr substitution and TiC addition was systematically studied. It was found by means of X-ray diffraction, transmission electron microscopy (TEM) and magnetic measurements that the combination of Zr substitution and TiC addition yields adequate microstructural control in both gas atomization (GA) and melt spinning (MS) techniques. For MS ribbons, an H{sub cj} of 11.7 kOe and (BH){sub max} of 11.9 MGOe at 27 degree sign C were obtained in the ribbons spun at 16 m/s and annealed at 700 degree sign C for 15 min. For GA powders, an H{sub cj} of 9.1 kOe and (BH){sub max} of 9.2 MGOe at 27 degree sign C were obtained in 20-25 {mu}m GA powder annealed at 700 degree sign C for 15 min. The temperature coefficients of B{sub r} and H{sub cj} are 0.06 and 0.36%/ degree sign C for the MS ribbon and 0.09 and 0.4%/ degree sign C for the GA powder in the temperature range of 27-100 degree sign C, respectively. TEM images revealed that the MS ribbon consists of a fine and uniform microstructure with an average size of 30 nm, while the GA spherical powder consists of an interior coarsened microstructuremore » with a grain size of 80 nm and a rim area with a grain size of 10 nm.« less

Authors:
; ; ; ; ;  [1]
  1. Ames Laboratory of USDOE, Iowa State University, Ames, Iowa 50011 (United States)
Publication Date:
OSTI Identifier:
20982865
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 101; Journal Issue: 9; Conference: 10. joint MMM/INTERMAG conference, Baltimore, MD (United States), 7-11 Jan 2007; Other Information: DOI: 10.1063/1.2710551; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ANNEALING; ATOMIZATION; BORON ALLOYS; COBALT ALLOYS; DYSPROSIUM ALLOYS; FERROMAGNETIC MATERIALS; GRAIN SIZE; IRON ALLOYS; MAGNETIC PROPERTIES; NEODYMIUM ALLOYS; POWDERS; TEMPERATURE COEFFICIENT; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0013-0065 K; TEMPERATURE RANGE 0065-0273 K; TITANIUM CARBIDES; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION; YTTRIUM ALLOYS; ZIRCONIUM ALLOYS

Citation Formats

Tang, W., Wu, Y. Q., Dennis, K. W., Kramer, M. J., Anderson, I. E., and McCallum, R. W. Comparison of microstructure and magnetic properties of gas-atomized and melt-spun MRE-Fe-Co-M-B (MRE=Y+Dy+Nd,M=Zr+TiC). United States: N. p., 2007. Web. doi:10.1063/1.2710551.
Tang, W., Wu, Y. Q., Dennis, K. W., Kramer, M. J., Anderson, I. E., & McCallum, R. W. Comparison of microstructure and magnetic properties of gas-atomized and melt-spun MRE-Fe-Co-M-B (MRE=Y+Dy+Nd,M=Zr+TiC). United States. doi:10.1063/1.2710551.
Tang, W., Wu, Y. Q., Dennis, K. W., Kramer, M. J., Anderson, I. E., and McCallum, R. W. Tue . "Comparison of microstructure and magnetic properties of gas-atomized and melt-spun MRE-Fe-Co-M-B (MRE=Y+Dy+Nd,M=Zr+TiC)". United States. doi:10.1063/1.2710551.
@article{osti_20982865,
title = {Comparison of microstructure and magnetic properties of gas-atomized and melt-spun MRE-Fe-Co-M-B (MRE=Y+Dy+Nd,M=Zr+TiC)},
author = {Tang, W. and Wu, Y. Q. and Dennis, K. W. and Kramer, M. J. and Anderson, I. E. and McCallum, R. W.},
abstractNote = {An MRE{sub 2}(Fe,Co){sub 14}B alloy with Zr substitution and TiC addition was systematically studied. It was found by means of X-ray diffraction, transmission electron microscopy (TEM) and magnetic measurements that the combination of Zr substitution and TiC addition yields adequate microstructural control in both gas atomization (GA) and melt spinning (MS) techniques. For MS ribbons, an H{sub cj} of 11.7 kOe and (BH){sub max} of 11.9 MGOe at 27 degree sign C were obtained in the ribbons spun at 16 m/s and annealed at 700 degree sign C for 15 min. For GA powders, an H{sub cj} of 9.1 kOe and (BH){sub max} of 9.2 MGOe at 27 degree sign C were obtained in 20-25 {mu}m GA powder annealed at 700 degree sign C for 15 min. The temperature coefficients of B{sub r} and H{sub cj} are 0.06 and 0.36%/ degree sign C for the MS ribbon and 0.09 and 0.4%/ degree sign C for the GA powder in the temperature range of 27-100 degree sign C, respectively. TEM images revealed that the MS ribbon consists of a fine and uniform microstructure with an average size of 30 nm, while the GA spherical powder consists of an interior coarsened microstructure with a grain size of 80 nm and a rim area with a grain size of 10 nm.},
doi = {10.1063/1.2710551},
journal = {Journal of Applied Physics},
number = 9,
volume = 101,
place = {United States},
year = {Tue May 01 00:00:00 EDT 2007},
month = {Tue May 01 00:00:00 EDT 2007}
}