High-coercivity ThMn12-type monocrystalline Sm–Zr–Fe–Co–Ti particles by high-temperature reduction diffusion

Gabay, Alexander M.; Hadjipanayis, George C.

doi:10.1016/j.scriptamat.2021.113760

High-coercivity ThMn₁₂-type monocrystalline Sm–Zr–Fe–Co–Ti particles by high-temperature reduction diffusion

Journal Article · Thu Feb 04 00:00:00 EST 2021 · Scripta Materialia

DOI:https://doi.org/10.1016/j.scriptamat.2021.113760· OSTI ID:1762003

Gabay, Alexander M. ^[1]; Hadjipanayis, George C. ^[2]

Univ. of Delaware, Newark, DE (United States); University of Delaware
Univ. of Delaware, Newark, DE (United States)

The ThMn₁₂-type (Sm,Zr)1(Fe,Co,Ti)₁₂ compounds have the potential of powerful permanent magnets. Magnetically hard and anisotropic powders of such compound have been prepared by subjecting elemental oxides and Co mixed with Ca and CaO dispersant to a succession of high-energy ball-milling, reduction diffusion at 990–1220 °C and repeated washing. The size of the resulting ThMn₁₂-type crystallites, their coercivity and fraction of monocrystalline particles were all found to increase with the reduction-diffusion temperature. Particles synthesized at 1220 °C were highly monocrystalline with a mean size of 0.54 μm and, after a magnetic-field alignment, exhibited a coercivity of 1.26 T and a full-density-projected maximum energy product of at least 209 kJ/m³ (26.3 MGOe). Here, the strong positive effect of the reduction-diffusion temperature on the coercivity has been attributed to separation of the crystallites and to decrease in the incidence of structural defects.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of Delaware, Newark, DE (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: FG02-90ER45413

OSTI ID:: 1762003

Alternate ID(s):: OSTI ID: 1780061
OSTI ID: 23196489

Journal Information:: Scripta Materialia, Journal Name: Scripta Materialia Vol. 196; ISSN 1359-6462

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

References (20)

Crystallized melt spun Sm(Fe10−xCox)11Ti alloys with (BH)max products larger than 90 kJ m−3 (11.3 MGOe) Ding, J.; Rosenberg, M. Journal of the Less Common Metals, Vol. 161, Issue 2 https://doi.org/10.1016/0022-5088(90)90036-J	journal	July 1990
Dependence of coercivity on particle size in Sm2Fe17N3 powders Kobayashi, Kurima; Skomski, Ralph; Coey, J. M. D. Journal of Alloys and Compounds, Vol. 222, Issue 1-2 https://doi.org/10.1016/0925-8388(94)04902-5	journal	May 1995
On Synthesis and Magnetic Properties of Nd(Fe, Mo, Ti)12Z (Z=N, H) Cheng, Q. M.; Lin, J. H.; Su, M. Z. Journal of Alloys and Compounds, Vol. 280, Issue 1-2 https://doi.org/10.1016/S0925-8388(98)00746-4	journal	October 1998
Intrinsic magnetic properties of Sm(Fe1-Co )11Ti and Zr-substituted Sm1-yZr (Fe0.8Co0.2)11.5Ti0.5 compounds with ThMn12 structure toward the development of permanent magnets Tozman, P.; Sepehri-Amin, H.; Takahashi, Y. K. Acta Materialia, Vol. 153 https://doi.org/10.1016/j.actamat.2018.05.008	journal	July 2018
Development of ultra-fine grain sized SmFe12-based powders using hydrogenation disproportionation desorption recombination process Dirba, I.; Sepehri-Amin, H.; Ohkubo, T. Acta Materialia, Vol. 165 https://doi.org/10.1016/j.actamat.2018.11.065	journal	February 2019
Rapid solidification of Nd1+XFe11Ti compounds: Phase formation and magnetic properties Maccari, F.; Schäfer, L.; Radulov, I. Acta Materialia, Vol. 180 https://doi.org/10.1016/j.actamat.2019.08.057	journal	November 2019
Achievement of high coercivity in Sm(Fe0.8Co0.2)12 anisotropic magnetic thin film by boron doping Sepehri-Amin, H.; Tamazawa, Y.; Kambayashi, M. Acta Materialia, Vol. 194 https://doi.org/10.1016/j.actamat.2020.05.026	journal	August 2020
Nanocrystalline Sm-based 1:12 magnets Schönhöbel, A. M.; Madugundo,, R.; Barandiarán, J. M. Acta Materialia, Vol. 200 https://doi.org/10.1016/j.actamat.2020.08.075	journal	November 2020
The stability of newly developed (R,Zr)(Fe,Co)12−xTix alloys for permanent magnets Kobayashi, K.; Suzuki, S.; Kuno, T. Journal of Alloys and Compounds, Vol. 694 https://doi.org/10.1016/j.jallcom.2016.09.311	journal	February 2017
Anisotropic, single-crystalline SmFe12-based microparticles with high roundness fabricated by jet-milling Dirba, I.; Li, J.; Sepehri-Amin, H. Journal of Alloys and Compounds, Vol. 804 https://doi.org/10.1016/j.jallcom.2019.06.365	journal	October 2019
Mechanochemical synthesis of magnetically hard anisotropic RFe10Si2 powders with R representing combinations of Sm, Ce and Zr Gabay, A. M.; Hadjipanayis, G. C. Journal of Magnetism and Magnetic Materials, Vol. 422 https://doi.org/10.1016/j.jmmm.2016.08.064	journal	January 2017
Effect of Y substitution on the structural and magnetic properties of Sm(Fe0.8Co0.2)11.4Ti0.6 Hagiwara, Masaya; Sanada, Naoyuki; Sakurada, Shinya Journal of Magnetism and Magnetic Materials, Vol. 465 https://doi.org/10.1016/j.jmmm.2018.06.042	journal	November 2018
Magnetic hardening of Sm‐Fe‐Ti alloys Wecker, J.; Katter, M.; Schnitzke, K. Journal of Applied Physics, Vol. 67, Issue 9 https://doi.org/10.1063/1.344744	journal	May 1990
(Sm,Zr)(Fe,Co) _11.0-11.5 Ti _1.0-0.5 compounds as new permanent magnet materials Kuno, Tomoko; Suzuki, Shunji; Urushibata, Kimiko AIP Advances, Vol. 6, Issue 2 https://doi.org/10.1063/1.4943051	journal	February 2016
Low-cost Ce _{1- x} Sm _x (Fe, Co, Ti) ₁₂ alloys for permanent magnets Gabay, A. M.; Martín-Cid, A.; Barandiaran, J. M. AIP Advances, Vol. 6, Issue 5 https://doi.org/10.1063/1.4944066	journal	May 2016
( Sm , Zr ) Fe 12 − x M x ( M = Zr , Ti , Co ) for Permanent-Magnet Applications: Ab Initio Material Design Integrated with Experimental Characterization Matsumoto, Munehisa; Hawai, Takafumi; Ono, Kanta Physical Review Applied, Vol. 13, Issue 6 https://doi.org/10.1103/PhysRevApplied.13.064028	journal	June 2020
POWDER CELL – a program for the representation and manipulation of crystal structures and calculation of the resulting X-ray powder patterns Kraus, W.; Nolze, G. Journal of Applied Crystallography, Vol. 29, Issue 3, p. 301-303 https://doi.org/10.1107/S0021889895014920	journal	June 1996
Coercivity of Pulverized ThMn₁₂ Compounds with a Limited Amount of α-(Fe,Co) Phase Kuno, Tomoko; Suzuki, Shunji; Urushibata, Kimiko MATERIALS TRANSACTIONS, Vol. 60, Issue 8 https://doi.org/10.2320/matertrans.M2019038	journal	January 2019
Preparation of High-Coercivity Magnetic Powder via Heat Treatment of a Rapidly Quenched Amorphous Starting Compound with a ThMn₁₂ Structure Kuno, Tomoko; Yamamoto, Takahide; Urushibata, Kimiko MATERIALS TRANSACTIONS, Vol. 61, Issue 4 https://doi.org/10.2320/matertrans.MT-M2019356	journal	January 2020
Enhancement of Magnetic Properties of Sm(Fe, Co, Ti)₁₂ Melt-Spun Ribbons by Refining Crystallized Grains Sugimoto, Satoshi; Kojima, Akihiko; Okada, Masuo Materials Transactions, JIM, Vol. 32, Issue 12 https://doi.org/10.2320/matertrans1989.32.1180	journal	January 1991

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36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
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Magnetic anisotropy
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High-coercivity ThMn12-type monocrystalline Sm–Zr–Fe–Co–Ti particles by high-temperature reduction diffusion

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High-coercivity ThMn₁₂-type monocrystalline Sm–Zr–Fe–Co–Ti particles by high-temperature reduction diffusion