Coercivity and nanostructure of melt-spun Ti-Fe-Co-B-based alloys

W. Y. Zhang, R. Skomski, A. Kashyap, S. Valloppilly, X. Z. Li, J. E. Shield, D. J. Sellmyer

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Nanocrystalline Ti-Fe-Co-B-based alloys, prepared by melt spinning and subsequent annealing, have been characterized structurally and magnetically. X-ray diffraction and thermomagnetic measurements show that the ribbons consist of tetragonal Ti3(Fe,Co)5B2, FeCo-rich bcc, and NiAl-rich L21 phases; Ti3(Fe,Co)5B2, is a new substitutional alloy series whose end members Ti3Co5B2 and Ti3Fe5B2 have never been investigated magnetically and may not even exist, respectively. Two compositions are considered, namely Ti11+xFe37.5-0.5xCo37.5-0.5xB14 (x = 0, 4) and alnico-like Ti11Fe26Co26Ni10Al11Cu2B14, the latter also containing an L21-type alloy. The volume fraction of the Ti3(Fe,Co)5B2 phase increases with x, which leads to a coercivity increase from 221 Oe for x = 0 to 452 Oe for x = 4. Since the grains are nearly equiaxed, there is little or no shape anisotropy, and the coercivity is largely due to the magnetocrystalline anisotropy of the tetragonal Ti3(Fe,Co)5B2 phase. The alloy containing Ni, Al, and Cu exhibits a magnetization of 10.6 kG and a remanence ratio of 0.59. Our results indicate that magnetocrystalline anisotropy can be introduced in alnico-like magnets, adding to shape anisotropy that may be induced by field annealing.

Original languageEnglish (US)
Article number056001
JournalAIP Advances
Volume6
Issue number5
DOIs
StatePublished - May 1 2016

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coercivity
anisotropy
annealing
melt spinning
remanence
ribbons
magnets
magnetization
diffraction
x rays

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Zhang, W. Y., Skomski, R., Kashyap, A., Valloppilly, S., Li, X. Z., Shield, J. E., & Sellmyer, D. J. (2016). Coercivity and nanostructure of melt-spun Ti-Fe-Co-B-based alloys. AIP Advances, 6(5), [056001]. https://doi.org/10.1063/1.4942552

Coercivity and nanostructure of melt-spun Ti-Fe-Co-B-based alloys. / Zhang, W. Y.; Skomski, R.; Kashyap, A.; Valloppilly, S.; Li, X. Z.; Shield, J. E.; Sellmyer, D. J.

In: AIP Advances, Vol. 6, No. 5, 056001, 01.05.2016.

Research output: Contribution to journalArticle

Zhang, WY, Skomski, R, Kashyap, A, Valloppilly, S, Li, XZ, Shield, JE & Sellmyer, DJ 2016, 'Coercivity and nanostructure of melt-spun Ti-Fe-Co-B-based alloys', AIP Advances, vol. 6, no. 5, 056001. https://doi.org/10.1063/1.4942552
Zhang WY, Skomski R, Kashyap A, Valloppilly S, Li XZ, Shield JE et al. Coercivity and nanostructure of melt-spun Ti-Fe-Co-B-based alloys. AIP Advances. 2016 May 1;6(5). 056001. https://doi.org/10.1063/1.4942552
Zhang, W. Y. ; Skomski, R. ; Kashyap, A. ; Valloppilly, S. ; Li, X. Z. ; Shield, J. E. ; Sellmyer, D. J. / Coercivity and nanostructure of melt-spun Ti-Fe-Co-B-based alloys. In: AIP Advances. 2016 ; Vol. 6, No. 5.
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