Development of crystallography texture in SmCo7/α-Fe nanocomposite magnets prepared by high-pressure thermal compression

Zhu, Guangjun; Lou, Li; Song, Wenpeng; Zhang, Qian; Hua, Yingxin; Huang, Guangwei; Li, Xiaohong; Zhang, Xiangyi

doi:10.1016/j.jallcom.2018.03.363

Cited by 18 publications

(2 citation statements)

References 20 publications

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“…Sm-Co-based permanent magnets have been used in aerospace, electric vehicle motors, wind turbines, sensors and actuators because of high Curie temperatures, excellent temperature stability and good corrosion resistance [1][2][3]. Extensive investigations were conducted to investigate the magnetic properties of Sm-Co alloys with alloying elements Fe, Cu and Zr, which results in a new class of Sm(Co, Fe, Cu, Zr) z (5 ≤ Z ≤ 8.5) permanent magnets [4][5][6][7][8][9][10][11]. It was reported that the addition of Cu into Sm-Co-based permanent magnets would improve their coercivity (H cj ) [12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Effect of Cu Substitution and Heat Treatment on Phase Formation and Magnetic Properties of Sm12Co88−xCux Melt-Spun Ribbons

Dai

Luo

et al. 2022

Materials

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The phase structure and microstructure of Sm12Co88−xCux (x = 0, 2, 4, 6, 8, 10; at.%) as-cast alloys and melt-spun ribbons prepared via the arc-melting method and melt-spun technology were studied experimentally by X-ray diffraction (XRD) and scanning electron microscope (SEM) with energy dispersive spectroscopy (EDS). The results reveal that the Sm12Co88−xCux (x = 0) as-cast alloy contains Sm2Co17 and Sm5Co19 phases, while the Sm12Co88−xCux (x = 2) as-cast alloy is composed of Sm2Co17, Sm2Co7 and Sm(Co, Cu)5 phases. Sm2Co17 and Sm(Co, Cu)5 phases are detected in Sm12Co88−xCux (x = 4, 6, 8, 10) as-cast alloys. Meanwhile, Sm12Co88−xCux ribbons show a single SmCo7 phase, which is still formed in the ribbons annealed at 1023 K for one hour. After annealed at 1123 K for two hours, cooled slowly down to 673 K at 0.5 K/min and then kept for four hours, the ribbons are composed of Sm2Co17 and Sm(Co, Cu)5 phases. The magnetic measurements of Sm12Co88−xCux ribbons were performed by vibrating sample magnetometer (VSM). The results exhibit that the maximum magnetic energy product ((BH)max), the coercivity (Hcj) and the remanence (Br) of the Sm12Co88−xCux ribbons increase generally with the increase in Cu substitution. In particular, the magnetic properties of the ribbons annealed at 1123 K and 673 K increase significantly with the increase in Cu substitution, resulting from the increase in the volume fraction of the formed Sm(Co, Cu)5 phase after heat treatment.

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Section: Introductionmentioning

confidence: 99%

Effect of Cu Substitution and Heat Treatment on Phase Formation and Magnetic Properties of Sm12Co88−xCux Melt-Spun Ribbons

Dai

Luo

et al. 2022

Materials

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“…Grain size and shape are also crucial for well exchangecoupled nanocomposite magnets. The microstructure of fine grains can be achieved by various sophisticated physical methods [24][25][26][27][28][29]. Compared with physical approaches such as melt-spinning and ball milling, chemical synthesis has advantages in preparing nanoparticles with well-controlled grain size and desired shape [30,31].…”

Section: Introductionmentioning

confidence: 99%

Micromagnetic study for optimum performance of isotropic Nd₂Fe₁₄B/α-Fe nanocomposite bulk magnets

Kim¹,

Ding²,

Zha³

et al. 2021

J. Phys. D: Appl. Phys.

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The nanocomposite magnets attract great interest in the study of high-performance magnets. Here, the micromagnetic simulations have been performed to investigate the effects of various microstructural factors such as grain geometry, grain size, and volume fraction on the performance of a soft-in-hard-matrix nanostructured Nd2Fe14B/α-Fe isotropic magnet. It is found that there is very little dependence of remanence on the geometry of the soft phase. The coercivity decreases with increasing the soft grain size, whereas it has a variation tendency depending on the size of hard grain size. In contrast to a significant role of soft-sphere geometry in anisotropic nanocomposites (Skomski et al 2013 IEEE Trans. Magn. 49 3215), the energy product of the soft-sphere system simulated here is slightly increased ( ⩽ 8 kJ m−3), compared with that of the soft-cylinder system. In the meantime, a significant enhancement in energy product with increasing the soft grain size is observed only when the hard grain size is less than 15 nm. Our simulation predicts the highest energy product of 347 kJ m−3 with a hard grain size of 5 nm and a soft-sphere size of 12.4 nm (30 vol% of the soft phase). It is shown that the effective magnetocrystalline anisotropy is responsible for the variation in coercivity, based on its quantitative evaluation for the soft-sphere system.

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Magnetic Properties and Microstructural Modifications of Sm-Co-Hf Alloy Ribbons by B Addition

Zhong

Xie

Rehman

2022

J Supercond Nov Magn

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Development of crystallography texture in SmCo7/α-Fe nanocomposite magnets prepared by high-pressure thermal compression

Cited by 18 publications

References 20 publications

Effect of Cu Substitution and Heat Treatment on Phase Formation and Magnetic Properties of Sm12Co88−xCux Melt-Spun Ribbons

Effect of Cu Substitution and Heat Treatment on Phase Formation and Magnetic Properties of Sm12Co88−xCux Melt-Spun Ribbons

Micromagnetic study for optimum performance of isotropic Nd₂Fe₁₄B/α-Fe nanocomposite bulk magnets

Magnetic Properties and Microstructural Modifications of Sm-Co-Hf Alloy Ribbons by B Addition

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Development of crystallography texture in SmCo7/α-Fe nanocomposite magnets prepared by high-pressure thermal compression

Cited by 18 publications

References 20 publications

Effect of Cu Substitution and Heat Treatment on Phase Formation and Magnetic Properties of Sm12Co88−xCux Melt-Spun Ribbons

Effect of Cu Substitution and Heat Treatment on Phase Formation and Magnetic Properties of Sm12Co88−xCux Melt-Spun Ribbons

Micromagnetic study for optimum performance of isotropic Nd2Fe14B/α-Fe nanocomposite bulk magnets

Magnetic Properties and Microstructural Modifications of Sm-Co-Hf Alloy Ribbons by B Addition

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Micromagnetic study for optimum performance of isotropic Nd₂Fe₁₄B/α-Fe nanocomposite bulk magnets