Abstract:
본 발명의 일 실시예에 따른 소결 자석의 제조 방법은 환원-확산 방법을 통해 R-T-B계 자석 분말을 제조하는 단계; 상기 R-T-B계 자석 분말을 소결하는 단계를 포함하고, 상기 R은 희토류 원소이고, 상기 T는 전이 금속이며, 상기 자석 분말을 제조하는 단계는, R-T-B계 원료에 내화 금속(Refractory metal) 황화물 분말을 첨가하는 단계를 포함한다.
Abstract:
The invention relates to high entropy alloy of rare earth elements (RE-HEAs) including at least four and up to twelve elements selected form rare earth elements R1,R2,R3,R4,R5,R6,R7,R8,R9,R10,R11,R12, which rare earth elements R1 to R12 each represents one of elements 57 to 60, 62 to 70, 39 and 40 of the periodic system and to high entropy alloy of transition elements (TM-HEAs) including at least 3 and up to 12 elements selected from transitional elements TM1,TM2,TM3,TM4,TM5,TM6,TM7,TM8,TM9,TM10,TM11,TM12, which transitional elements TM1 to TM12 each represent at least one of elements 21 to 30, 41 to 48 and 72 to 79 of the periodic system. Such RE-HEAs and/or TM-HEAs can be used as building blocks in magnetic high entropy composite alloys, e.g. of the type (RE-HEAs)x(TM-HEAs)yTz, for the manufacture of magnetic devices and permanent magnets.
Abstract:
In one aspect of an inventive concept, a product includes a substrate and a material formed from a precursor powder, where the material includes a plurality of particles from the precursor powder deposited on the substrate. The plurality of particles have structural characteristics defined by an impact of the particles on the substrate and/or on previously deposited particles. Moreover, the material has a microstructure, where the microstructure of the material is substantially the same as a microstructure of the precursor powder. The microstructure of the material is characterized by at least one property, where the at least one property is substantially the same as a corresponding at least one property of the precursor powder.
Abstract:
一种细晶粒稀土类合金铸片、制备方法及旋转冷却辊装置。所述合金铸片具有贴辊面和自由面,包括以R 2 Fe 14 B型化合物为主相的晶粒,沿温度梯度截面上,晶粒包括非柱状晶粒和柱状晶粒,其中,纵横比为0.3~2的非柱状晶粒占晶粒的面积百分比≥60%,占晶粒的个数百分比≥75%;纵横比≥3的柱状晶粒占晶粒的面积百分比≤15%,占晶粒的个数百分比≤10%;合金铸片包括R 2 Fe 14 B型主相、内嵌于晶粒内的晶粒内部富稀土相、以及分布于晶粒边界的晶粒边界富稀土相,其中,晶粒内部富稀土相的间隔为0.5~3.5μm。制备的合金铸片经化学破碎和机械破碎后所得粉体粒径更加均匀,富稀土相附着率更高,磁体矫顽力提升。
Abstract:
Magnets including a coating and related methods are described herein. The coating may include an aluminum manganese alloy layer. The aluminum manganese alloy layer may be formed in an electroplating process.
Abstract:
The present disclosure relates to nano-sized magnetic particles, such as neodymium-iron-boron rare earth magnetic particles, and encapsulated magnetic nanoparticles, which include a magnetic nanoparticle core encapsulated by a protective layer. Magnetic nanoparticles can be encapsulated in, for example, a silane-derivative protective layer or a phosphate-containing protective layer. Also provided are nanocomposite permanent magnets comprising magnetic nanoparticles and encapsulated magnetic nanoparticles. Further provided are methods of making and using the same.
Abstract:
A rare earth permanent magnetic material contains a main phase of R1 x1 R2 y1 Fe 1-x1-y1-z1-u1 Co z1 B u1 , and an auxiliary phase including a first auxiliary phase of R3 x2 R4 y2 Fe 1-x2-y2-z2-u2-v1 Co z2 B u2 M v1 and a second auxiliary of R5 x3 R6 y3 Fe 1-x3-y3-z3-u3-v2 Co z3 B u3 M v2 . Each of R1, R3 and R5 is Pr and/or Nd. Each of R2, R4 and R6 is at least one of Dy, Tb and Ho. M is at least one of Zr, Ga, Cu, Nb, Sn, Mo, Al, V, W, Si, Hf, Ti, Zn, Bi, Ta and In. 26wt%≤x1+y1≤34wt%, 0.01wt%≤y1≤4wt%, 0≤z1≤6wt%, and 0.78wt%≤u1≤1.25wt%. 35wt%≤x2+y2≤82wt%, 5wt%≤y2≤42wt%, 0≤z2≤40wt%, 0≤u2≤1.25wt%, and 0≤v1≤10wt%. 10wt%≤x3+y3≤32wt%, 0≤y3≤4.8wt%, 0≤z3≤40wt%, 0≤u3≤1.25wt%, and 31wt%≤v2≤50wt%.