Bulk magnetic hardening in Sm(Fe,V)12 alloys
Source abstract
Abstract
Cast Sm-Fe-V magnets with the tetragonal crystal structure of the ThMn 12 type were prepared with high coercivity through a two-step annealing at 775 °C and then at 825 °C. The annealing processing used allowed us for the first time to successfully produce a large amount of non-magnetic Sm-rich grain-boundary phase in Sm-Fe-V cast ingots. As a result, the sample with composition Sm 11.1Fe 75.8V 13.1 showed the record-high coercivity (6.66 kOe) after annealing at 775 °C for 72 h and then 825 °C for 2 h. This coercivity, achieved without the use of powder metallurgy, has nearly doubled compared to the previously reported highest value of 3.70 kOe in a cast SmFe 10V 2.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Magnetic Properties of Alloys · Rare-earth and actinide compounds · Magnetic Properties and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (28)
Show source-provided references
1. A search for new phases and processing techniques for permanent magnet development10.1016/0921-5107(89)90154-2 ↗
2. Strategy for high-coercivity Nd–Fe–B magnets10.1016/j.scriptamat.2012.06.038 ↗
3. Crystal field and exchange interactions in R(Fe11Ti) and R(Fe11Ti)N (R Gd, Er)10.1016/0304-8853(94)01497-3 ↗
4. Intrinsic hard magnetic properties of Sm(Fe1−xCox)12 compound with the ThMn12 structure10.1016/j.scriptamat.2017.05.029 ↗
5. Intrinsic magnetic properties of Sm(Fe 1–x Co x) 11 Ti and Zr-substituted Sm 1-y Zr y (Fe 0.8 Co 0.2) 11.5 Ti 0.5 compounds with ThMn 12 structure toward the development of permanent magnets10.1016/j.actamat.2018.05.008 ↗
6. Intrinsic magnetic properties of SmFe12−V alloys with reduced V-concentration10.1016/j.jallcom.2019.01.332 ↗
7. Permanent magnet materials based on tetragonal rare earth compounds of the type RFe12−xMx10.1016/0304-8853(91)90813-P ↗
8. Recent developments in RFe12-type compounds for permanent magnets10.1016/j.scriptamat.2017.10.033 ↗
9. Magnetic material R, Fe, Mo,(Co) with ThMn 1 2 structure10.1063/1.341473 ↗
10. Magnetic hardening of Sm-Fe-Mo, Sm-Fe-V and Sm-Fe-Ti magnets10.1016/0304-8853(90)90506-L ↗
11. Coercivity in ThMn 12 -type magnets10.1063/1.342234 ↗
12. The Sm-Fe-V based 1:12 bulk magnets10.1016/j.jallcom.2019.03.249 ↗
13. Intrinsic magnetic properties of (Sm, Gd)Fe12-based compounds with minimized addition of Ti10.1016/j.jallcom.2020.157491 ↗
14. Achievement of high coercivity in Sm(Fe0.8Co0.2)12 anisotropic magnetic thin film by boron doping10.1016/j.actamat.2020.05.026 ↗
15. Emergence of coercivity in Sm(Fe0.8Co0.2)12 thin films via eutectic alloy grain boundary infiltration10.1016/j.scriptamat.2019.02.001 ↗
16. Coercivity engineering in Sm(Fe0.8Co0.2)12B0.5 thin films by Si grain boundary diffusion10.1016/j.actamat.2022.117716 ↗
17. Coercivities of Sm–Fe–M sintered magnets with thmn12-type structure (M = Ti, V)10.2320/matertrans.MT-MBW2020003 ↗
18. Magnetic properties and microstructures of the (SmFe10V2) 1–x-(Sm2Fe17)x cast alloys10.1016/0254-0584(96)80018-6 ↗
19. Magnetic hardening of SmFe/sub 10/V/sub 2/ by melt-spinning10.1109/20.42285 ↗
20. Nucleation fields and grain boundaries in hard magnetic materials10.1109/20.281083 ↗
21. Role of V on the coercivity of SmFe12-based melt-spun ribbons revealed by machine learning and microstructure characterizations10.1016/j.scriptamat.2021.113925 ↗
22. High-coercivity SmFe10V2 powder with Sm-rich layers prepared by a reduction-diffusion process10.1016/j.jmmm.2022.169239 ↗
23. ThMn12-type alloys for permanent magnets10.1016/j.eng.2018.12.011 ↗
24. High coercivity in melt-spun SmFe10(Ti, M)2 ribbons (M=V/Cr/Mn/Mo)10.1109/20.104383 ↗
25. Comparison of the improvement of thermal stability of NdFeB sintered magnets: Intrinsic and/or microstructural10.1063/1.356876 ↗
26. Study of high-coercivity sintered NdFeB magnets10.1016/j.jmmm.2006.04.029 ↗
27. Effect of nitrogen on the structural and magnetic properties of intermetallic compounds with the ThMn12 structure10.1063/1.350076 ↗
28. Intrinsic magnetic properties of Sm(Fe1-xCox)11Ti and Zr-substituted Sm1-yZry(Fe0.8Co0.2)11.5Ti0.5 compounds with ThMn12 structure toward the development of permanent magnets10.1016/j.actamat.2018.05.008 ↗