Development of ultra-fine grain sized SmFe12-based powders using hydrogenation disproportionation desorption recombination process
Source abstract
Abstract
Abstract SmFe12-based compounds possess promising intrinsic magnetic properties, even superior to those of Nd2Fe14B phase at elevated temperatures. However, the remaining challenge is to demonstrate that those intrinsic properties can be further developed into practically relevant extrinsic ones by proper processing. Here we have employed hydrogenation disproportionation desorption recombination (HDDR) process for preparation of ultrafine-grained SmFe12-based alloys with the tetragonal ThMn12-type crystal structure. The effect of alloying elements and grain boundary phase on disproportionation rate is investigated and experimental HDDR process phase diagram is proposed. Due to the high vapor pressure of Sm as well as the competing phases, recombination into phase-pure samples can be realized only in a narrow processing parameters window. The resultant phase constitutions, chemical composition, microsctructure and crystallographic relations at different process steps are discussed.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Magnetic Properties of Alloys · Magnetic properties of thin films · Magnetic Properties and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (35)
Show source-provided references
1. The magnetic and structural properties of R-Ti-Fe ternary compounds10.1109/TMAG.1987.1065256 ↗
2. New material for permanent magnets on a base of Nd and Fe (invited)10.1063/1.333572 ↗
3. Pr-Fe and Nd-Fe-based materials: a new class of high-performance permanent magnets (invited)10.1063/1.333571 ↗
4. United Nations · 2016 · 1
5. Intrinsic hard magnetic properties of Sm(Fe 1−x Co x ) 12 compound with the ThMn 12 structure10.1016/j.scriptamat.2017.05.029 ↗
6. Chapter 1 Magnetic properties of ternary rare-earth transition-metal compounds10.1016/S1567-2719(05)80055-1 ↗
7. Permanent magnet materials based on tetragonal rare earth compounds of the type RFe12-xMx10.1016/0304-8853(91)90813-P ↗
8. Intrinsic magnetic properties of Sm(Fe1-xCox)11Ti and Zr-substituted Sm1-yZry(Fe0.8Co0.2)11.5Ti0.5compounds with ThMn12structure toward the development of permanent magnets10.1016/j.actamat.2018.05.008 ↗
9. (Sm,Zr)(Fe,Co)11.0-11.5Ti1.0-0.5 compounds as new permanent magnet materials10.1063/1.4943051 ↗
10. The stability of newly developed (R,Zr)(Fe,Co)12−xTixalloys for permanent magnets10.1016/j.jallcom.2016.09.311 ↗
11. Magnetic and structural properties of SmTiFe11-xCox alloys10.1016/0304-8853(88)90039-X ↗
12. Rare-earth and transition metal sublattice contributions to magnetization and magnetic anisotropy of R(TM,Ti)12 single crystals10.1016/S0925-8388(98)00406-X ↗
13. No title
14. Hydrogenation, disproportionation and desorption (HDD): an effective processing route for NdFeB-type magnets10.1016/0022-5088(90)90071-Q ↗
15. Disproportionation in Nd16Fe76B8-type hydrides10.1016/0022-5088(90)90353-L ↗
16. Enhancement of the magnetic properties of Sm-Fe and Nd-Fe-N alloys with ThMn12 structure by utilizing HDDR phenomena10.1109/TJMJ.1993.4565741 ↗
17. Hydrogen absorption and desorption study of Nd-TM-B system10.1109/20.312428 ↗
18. Resistivity measurements on hydrogenation disproportionation desorption recombination phenomena in Nd-Fe-B alloys with Co, Ga and Zr additions10.1016/S0925-8388(97)00175-8 ↗
19. Harashima · 2016 · 1
20. Influence of Zr substitution on the stabilization of ThMn12-type (Nd1-αZrα)(Fe0.75Co0.25)11.25Ti0.75N1.2-1.4(α = 0-0.3) compounds10.1063/1.4944521 ↗
21. Harashima
22. NdFeB anisotropic magnet powders produced by the HDDR process10.1016/0925-8388(93)90364-S ↗
23. Origin of magnetic anisotropy formation in the HDDR-process of Nd2Fe14B-based alloys10.1016/0925-8388(96)02378-X ↗
24. Gutfleisch · 2002 · vol. 38 · 2958
25. Memory of texture during HDDR processing of NdFeB10.1109/TMAG.2003.815749 ↗
26. Mechanism of the texture development in hydrogen-disproportionation-desorption-recombination (HDDR) processed Nd-Fe-B powders10.1016/j.actamat.2014.11.003 ↗
27. Kim · 2018 · vol. 732 · 32
28. High-coercivity Sm2Fe17Nx powders produced by HDDR and nitriding processes10.1016/0254-0584(92)90212-Q ↗
29. Novel permanent magnetic materials10.1088/0031-8949/1991/T39/002 ↗
30. High coercivity in melt-spun SmFe10(Ti,M)2 ribbons (M=V/Cr/Mn/Mo)10.1109/20.104383 ↗
31. Mechanochemical synthesis of magnetically hard anisotropic RFe10Si2 powders with R representing combinations of Sm, Ce and Zr10.1016/j.jmmm.2016.08.064 ↗
32. Effect of Ga addition on the microstructure and magnetic properties of hydrogenation–disproportionation–desorption–recombination processed Nd–Fe–B powder10.1016/j.actamat.2009.10.035 ↗
33. Coercivity enhancement of hydrogenation–disproportionation–desorption–recombination processed Nd–Fe–B powders by the diffusion of Nd–Cu eutectic alloys10.1016/j.scriptamat.2010.08.021 ↗
34. Magnetic properties of rare earth iron intermetallic compounds10.1109/TMAG.1966.1065874 ↗
35. Improved magnetic properties by treatment of iron-based rare earth intermetallic compounds in ammonia10.1016/0304-8853(90)90756-G ↗