scholarly journals Phase Formation, Microstructure, and Magnetic Properties of Nd14.5Fe79.3B6.2 Melt-Spun Ribbons with Different Ce and Y Substitutions

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3992
Author(s):  
Qingjin Ke ◽  
Feilong Dai ◽  
Shengxi Li ◽  
Maohua Rong ◽  
Qingrong Yao ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Phase Formation ◽  
High Performance ◽  
Magnetic Energy ◽  
Co Substitution ◽  
Energy Product ◽  
Melt Spun ◽  
Low Costs ◽  
Melt Spun Ribbons ◽  
Microstructure And Magnetic Properties

Phase formation and microstructure of (Nd1-2xCexYx)14.5Fe79.3B6.2 (x = 0.05, 0.10, 0.15, 0.20, 0.25) alloys were studied experimentally. The results reveal that (Nd1-2xCexYx)14.5Fe79.3B6.2 annealed alloys show (NdCeY)2Fe14B phase with the tetragonal Nd2Fe14B-typed structure (space group P42/mnm) and rich-RE (α-Nd) phase, while (Nd1-2xCexYx)14.5Fe79.3B6.2 ribbons prepared by melt-spun technology are composed of (NdCeY)2Fe14B phase, α-Nd phase and α-Fe phase, except for the ribbon with x = 0.25, which consists of additional CeFe2 phase. On the other hand, magnetic properties of (Nd1-2xCexYx)14.5Fe79.3B6.2 melt-spun ribbons were measured by a vibrating sample magnetometer (VSM). The measured results show that the remanence (Br) and the coercivity (Hcj) of the melt-spun ribbons decrease with the increase of Ce and Y substitutions, while the maximum magnetic energy product ((BH)max) of the ribbons decreases and then increases. The tendency of magnetic properties of the ribbons could result from the co-substitution of Ce and Y for Nd in Nd2Fe14B phase and different phase constitutions. It was found that the Hcj of the ribbon with x = 0.20 is relatively high to be 9.01 kOe, while the (BH)max of the ribbon with x = 0.25 still reaches to be 9.06 MGOe. It suggests that magnetic properties of Nd-Fe-B ribbons with Ce and Y co-substitution could be tunable through alloy composition and phase formation to fabricate novel Nd-Fe-B magnets with low costs and high performance.

Phase formation, microstructure and magnetic properties investigation in Cu and Fe substituted SmCo5 melt-spun ribbons

2008 ◽  
Vol 463 (1-2) ◽  
pp. 73-77 ◽  
Author(s):  
K. Suresh ◽  
R. Gopalan ◽  
G. Bhikshamaiah ◽  
A.K. Singh ◽  
D.V. Sridhara Rao ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Phase Formation ◽  
Melt Spun ◽  
Melt Spun Ribbons ◽  
Microstructure And Magnetic Properties

Structural and Magnetic Properties of Sm(CobalFe0.1Ni0.12Zr0.04B0.04)7.5 Melt Spun Ribbons

2010 ◽  
Vol 636-637 ◽  
pp. 404-410
Author(s):  
Sofoklis S. Makridis
Keyword(s):  
Magnetic Properties ◽  
Hysteresis Loops ◽  
Secondary Phase ◽  
Maximum Energy ◽  
Tem Analysis ◽  
Energy Product ◽  
Average Grain Size ◽  
Melt Spun ◽  
Melt Spun Ribbons ◽  
Structural And Magnetic Properties

We have investigated the structural and magnetic properties of Sm(Co0.70Fe0.1Ni0.12Zr0.04B0.04)7.5 melt spun ribbons. The arc-melted bulk samples have been used to obtain ribbons at 37 up to 55 m/sec while annealing has been performed in argon atmosphere for 30-75 min at 600-870 oC. In as-spun ribbons the hexagonal SmCo7 (TbCu7-type of structure) of crystal structure has been determined from x-ray diffraction patterns, while fcc-Co has been identified as a secondary phase. After annealing, the 1:7 phase of the as-spun ribbons transforms into 2:17 and 1:5 phases. TEM analysis shows a homogeneous nanocrystalline microstructure with average grain size of 30-80 nm. Coercivity values of 15-27 kOe are obtained from hysteresis loops traced at non-saturating fields. The coercivity decreases as temperature increases, but it is high enough to maintain values higher than 5 kOe at 380 oC. The maximum energy product at room temperature increases, as high as 7.2 MGOe, for melt-spun ribbons produced at higher wheel speed.

Effects of quenching speeds on microstructure and magnetic properties of novel SmCo6.9Hf0.1(CNTs)0.05 melt-spun ribbons

2009 ◽  
Vol 57 (9) ◽  
pp. 2845-2850 ◽  
Author(s):  
Ji-Bing Sun ◽  
Dan Han ◽  
Chun-Xiang Cui ◽  
Wei Yang ◽  
Liang Li ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Melt Spun ◽  
Melt Spun Ribbons ◽  
Microstructure And Magnetic Properties

scholarly journals The Effect of External Magnetic Field on Microstructure and Magnetic Properties of Melt-Spun Nd-Fe-B/Fe-Co Nanocomposite Ribbons

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Xuan Truong Nguyen ◽  
Hong Ky Vu ◽  
Hung Manh Do ◽  
Van Khanh Nguyen ◽  
Van Vuong Nguyen
Keyword(s):  
Magnetic Field ◽  
Grain Size ◽  
High Performance ◽  
Melt Spinning ◽  
Nominal Composition ◽  
Energy Product ◽  
Melt Spun ◽  
Spinning Process ◽  
Reduction Effect ◽  
Microstructure And Magnetic Properties

The ribbons Nd2Fe14B/Fe-Co were prepared with the nominal composition Nd16Fe76B8/40% wt. Fe65Co35by the conventional and the developed magnetic field-assisted melt-spinning (MFMS) techniques. Both ribbons are nanocomposites with the smooth single-phase-like magnetization loops. The 0.32 T magnetic field perpendicular to the wheel surface and assisting the melt-spinning process reduces the grain size inside the ribbon, increases the texture of the ribbon, improves the exchange coupling, and, in sequence, increases the energy product(BH)maxof the isotropic powdered samples of MFMS ribbon in ~9% by comparison with that of the ribbon melt-spun conventionally. The grain size reduction effect caused by the assisted magnetic field has also been described quantitatively. The MFMS technique seems to be promising for producing high-performance nanocomposite ribbons.

Effect of Ti and C additions on the microstructure and magnetic properties of Nd6Pr1Fe80B13 melt-spun ribbons

2006 ◽  
Vol 54 (18) ◽  
pp. 4871-4879 ◽  
Author(s):  
D NAGAHAMA ◽  
T OHKUBO ◽  
T MIYOSHI ◽  
S HIROSAWA ◽  
K HONO
Keyword(s):  
Magnetic Properties ◽  
Melt Spun ◽  
Melt Spun Ribbons ◽  
Microstructure And Magnetic Properties

Effect of TiC additions to the microstructure and magnetic properties of Nd9.5Fe84.5B6 melt-spun ribbons

1998 ◽  
Vol 83 (11) ◽  
pp. 6631-6633 ◽  
Author(s):  
M. J. Kramer ◽  
C. P. Li ◽  
K. W. Dennis ◽  
R. W. McCallum ◽  
C. H. Sellers ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Melt Spun ◽  
Melt Spun Ribbons ◽  
Microstructure And Magnetic Properties

Preparation of Anisotropic Nd-Lean Nd-Fe-B Magnets with Improved Coercivity

2017 ◽  
Vol 898 ◽  
pp. 1675-1680
Author(s):  
Qian Shen ◽  
Yi Long Ma ◽  
Xue Guo Yin ◽  
Tao Zhou
Keyword(s):  
Magnetic Properties ◽  
Grain Boundary ◽  
Grain Growth ◽  
The Other ◽  
Zn Diffusion ◽  
Energy Product ◽  
Initial Stage ◽  
The Press ◽  
Melt Spun ◽  
Melt Spun Ribbons

Anisotropic bulk nanocrystal Nd-lean Nd-Fe-B magnets were prepared by hot-pressing the mixture of Nd11.5Fe81.5Nb1B6 melt-spun ribbons and pure Zn powder and subsequent hot-deforming. The effects of deformation on the magnetic properties and microstructure were also studied. The magnetic properties increased significantly for hot-deformed (HD) samples due to the formation of good c-axis texture with increasing deformation. The remanence Mr and maximal energy product (BH)m increased and reached their maximal values at 65% deformation due to the increasing orientation. On the other hand, the grains increased and were elongated normal to the press direction gradually with increasing deformation. The variation trend was similar to that of traditional Nd-Fe-B magnets. However, there was an obvious improvement for coercivity in the initial stage of hot-deformation resulting from the adequate Zn diffusion into grain-boundary. When the deformation was larger than 65%, the magnetic properties were deteriorated due to abnormal grain growth. In order to improve further the coercivity Hci, the samples with Dy addition were prepared. The coercivity of 12300 Oe could be obtained for anisotropic bulk Nd9.5Dy2Fe81.5Nb1B6.

Effect of TiC addition on microstructure and magnetic properties for MRE2(Fe,Co)14B melt-spun ribbons (MRE=Nd+Y+Dy)

2006 ◽  
Vol 99 (8) ◽  
pp. 08B510 ◽  
Author(s):  
W. Tang ◽  
Y. Q. Wu ◽  
K. W. Dennis ◽  
M. J. Kramer ◽  
I. E. Anderson ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Melt Spun ◽  
Melt Spun Ribbons ◽  
Microstructure And Magnetic Properties

scholarly journals Microstructure and Magnetic Properties of Grain Refined Pr2Co14B Melt-Spun Ribbons

2019 ◽  
Vol 5 (1) ◽  
pp. 6
Author(s):  
I. Nlebedim ◽  
M. Huang ◽  
K. Sun ◽  
L. Zhou ◽  
R. McCallum ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Room Temperature ◽  
Anisotropy Field ◽  
Triple Junctions ◽  
Heat Treated ◽  
Melt Spun ◽  
The Matrix ◽  
Melt Spun Ribbons ◽  
Low Solubility ◽  
Microstructure And Magnetic Properties

The correlation between the grain refining effect of TiC on the microstructure of Pr2Co14B melt-spun ribbons and the magnetic properties is presented in this study. TiC enabled greater control of microstructure both in the as-spun and heat treated Pr2Co14B, compared with the material without TiC. As a result, coercivity of the sample with TiC was nearly twice that of the sample without TiC. In addition to Pr2Co14B, two other phases were found in the sample with TiC: one rich in Co and the other having a composition near PrCo2. TiC was found near the grain boundaries and at triple junctions. Also no Ti or C was found in the matrix phase indicating extreme low solubility of the elements when both are present with Pr2Co14B. As expected, both the samples with and without TiC have similar anisotropy field but the presence of room temperature non-ferromagnetic phases (TiC and PrCo2), caused a small decrease in magnetization of the sample with TiC although the romance of the isotropic materials were comparable.

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