Magnetic properties and structures of Y-substituted Nd–Y–Fe–B melt-spun ribbons

Meng, Zheng; Fang, Yikun; Song, Lizhu; Han, Rui; Zhu, Minggang; Li, Wei

doi:10.1007/s12598-018-1110-2

Cited by 14 publications

(14 citation statements)

References 29 publications

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“…Meanwhile, the high-abundant and cheap rare earth metals La, Ce, and Y were not used effectively in the production of Nd-Fe-B magnets. Therefore, the integrated utilization of rare earth metals in Nd-Fe-B magnets is a promising way to achieve the sustainable development of Nd-Fe-B magnets [ 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 ]. However, the magnetic properties of Nd-Fe-B magnets with La, Ce, and Y have deteriorated unavoidably through the traditional fabrication technology because intrinsic magnetic properties of La 2 Fe 14 B, Ce 2 Fe 14 B, and Y 2 Fe 14 B phases are inferior to those of Nd 2 Fe 14 B, Dy 2 Fe 14 B, and Tb 2 Fe 14 B phases [ 35 ].…”

Section: Introductionmentioning

confidence: 99%

“…However, the magnetic properties of Nd-Fe-B magnets with La, Ce, and Y have deteriorated unavoidably through the traditional fabrication technology because intrinsic magnetic properties of La 2 Fe 14 B, Ce 2 Fe 14 B, and Y 2 Fe 14 B phases are inferior to those of Nd 2 Fe 14 B, Dy 2 Fe 14 B, and Tb 2 Fe 14 B phases [ 35 ]. Recently, different fabrication technologies (e.g., double main phase method, dual alloy method, and grain boundary diffusion method) and microstructure optimization (e.g., grain boundary restructure) were developed to improve magnetic properties of Nd-Fe-B magnets with La, Ce, and Y [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 ].…”

Section: Introductionmentioning

confidence: 99%

“…In particular, the magnetic performance of Y and/or Ce substituted Nd-Fe-B alloys were investigated in the literature [ 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 ]. Chen et al [ 26 ] reported that Nd 9-x Y x Fe 72 Ti 2 Zr 2 B 15 nanocomposite ribbons exhibited high coercivity (923.4 kA/m).…”

Section: Introductionmentioning

confidence: 99%

“…Fan et al [ 30 ] found that Y substituted Nd-Ce-Fe-B sintered magnets show special core–shell microstructure characteristics with Y-rich core and Nd-rich shell, resulting in the improvement of the coercivity and the thermal stability of magnets. Zheng et al [ 32 ] studied magnetic properties of (Nd 1-x Y x ) 14.5 Fe bal B 6 Co 0.2 Al 1 Cu 0.15 melt-spun ribbons. Zhang et al [ 34 ] investigated phase constituent, microstructure, and magnetic properties of Nd 12-x Y x Fe 81 B 6 Nb melt-spun ribbons.…”

Section: Introductionmentioning

confidence: 99%

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

Dai

et al. 2021

Materials

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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.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

Dai

et al. 2021

Materials

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“…Alloying is an effective method to improve the mechanical properties of NiTiAl based alloys. Many elements, such as Mo, Nb, Hf, Zr, B and RE, have been added to strengthen the NiTi-Al alloys [4][5][6][7]. It has been reported that a Nb-and Mo modified Ni-45Ti-5Al-2Nb-1Mo (at%) alloy is expected to become a potential high-temperature structural material with strength of 650 MPa at 650 °C and 350 MPa at 800 °C [8][9].…”

Section: Introductionmentioning

confidence: 99%

Oxidation Behavior of NiTi-Al Based Alloy with Nb and Mo Additions

Song

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. Oxidation behavior of a Ni-45Ti-5Al-2Nb-1Mo (composition in at %) alloy was studied in comparison with the Ni-45Ti-5Al alloy by X-ray diffraction (XRD), scanning electron microscopy (SEM) and cyclic oxidation tests. The results show that the microstructure of Ni-45Ti-5Al-2Nb-1Mo alloy is composed of NiTi matrix, Ti 2 Ni and (Nb, Ti) solid solution phases. By 2 at% Nb and 1 at% Mo addition, the Ni-45Ti-5Al-2Nb-1Mo alloy shows excellent oxidation resistance. The mass gain of Ni-45Ti-5Al-2Nb-1Mo alloy after 100 h exposure at 800 °C is 2.29 mg/cm 2 , which is much lower than that of Ni-45Ti-5Al alloy. This is mainly resulted from the doping effect of Nb and Mo in TiO 2 and the formation of a continuous Al 2 O 3 layer by Nb and Mo addition.The oxide scale of the present alloy is with multi-layer structure in order of TiO2 layer/ Al2O3 + NiAl2O4 mixture layer/ TiO2 layer/ Nb-rich TiO2 layer/ Ni3Ti layer from outside. IntroductionOrder intermetallic alloys based on aluminides have been developed as high temperature structural materials for decades [1]. Recent investigations indicate that NiTi-Al based intermetallic alloys have the potential to use as high temperature structural materials for aerospace applications because of their low density, high strength at high temperature and good corrosion resistance. The addition of small amount of Al (no more than 8 at%) into NiTi alloy can dramatically improve the strength especially at high temperature [2][3]. Alloying is an effective method to improve the mechanical properties of NiTiAl based alloys. Many elements, such as Mo, Nb, Hf, Zr, B and RE, have been added to strengthen the NiTi-Al alloys [4][5][6][7]. It has been reported that a Nb-and Mo modified Ni-45Ti-5Al-2Nb-1Mo (at%) alloy is expected to become a potential high-temperature structural material with strength of 650 MPa at 650 °C and 350 MPa at 800 °C [8][9].Actual applications in the aerospace industry require the alloys to be considered in a variety of high-temperature environments. The oxidation behaviors of ternary NiTi-Al alloys at temperatures between 600 °C and 800 °C have been systemically studied, which found that NiTi-Al alloys shows poor oxidation resistance with the mass gain more than 20 mg/cm 2 after exposure in air at 800 °C for 100h. By adding little quaternary element Nb (3 at%), the oxidation resistance of NiTi-Al alloys can be notably improved [10][11].However, so for the studies on the oxidation behavior of NiTi-Al based alloys are limited, especially the knowledge of NiTi-Al based alloy simultaneously modified by two or more alloying elements are still lack. Therefore, in this paper, the isothermal oxidation behavior of Nb-and Mocontaining Ni-45Ti-5Al-2Nb-1Mo alloy is studied and discussed in detail.

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