Magnetic properties and phase stability of tetragonal Ce1-xSmxFe9Co2Ti 1:12 phase for permanent magnets

Journal Article · Fri Jun 01 00:00:00 EDT 2018 · Journal of Alloys and Compounds

DOI:https://doi.org/10.1016/j.jallcom.2018.03.325· OSTI ID:1430161

Martin-Cid, A. ; Salazar, D. ; Schönhöbel, A. M.; Garitaonandia, J. S.; Barandiaran, J. M.; Hadjipanayis, G. C.

In this work, we report the effects of partial substitution of Ce by Sm in CeFe₉Co₂Ti alloys on their magnetic and structural properties. The alloys were prepared in bulk and melt-spun ribbons. The alloys present the ThMn₁₂ phase in the full range of substitutions, and reach anisotropy fields above 8 T for the best alloy. After heat treatment, melt-spun ribbons show high values of magnetization (>112 A m²/kg), Curie temperatures >370°C and enhanced coercivity. Although the coercivity values obtained are already suitable for permanent magnet applications, they are still low as compared to the anisotropy field (less than 6%). Coercivity is expected to improve by optimizing the microstructure of the best samples.

• Research Organization: Univ. of Delaware, Newark, DE (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: FG02-90ER45413
• OSTI ID: 1430161
• Alternate ID(s): OSTI ID: 1511581
• Journal Information: Journal of Alloys and Compounds, Journal Name: Journal of Alloys and Compounds Vol. 749 Journal Issue: C; ISSN 0925-8388
• Publisher: Elsevier
• Country of Publication: Netherlands
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ThMn12 structure
Permanent magnets
Melt-spun ribbons
Nanocrystallization