Development of bonded (La,Ce,Y)-Fe-B permanent magnets with higher performance/cost ratio than Nd-Fe-B and (Nd,La,Ce)-Fe-B magnets

Article Chemistry, Multidisciplinary

Understanding the Role of Element Grain Boundary Diffusion Mechanism in Nd-Fe-B Magnets

Lizhong Zhao et al.

Summary: The study investigates the synergistic effects of three rare earth elements in permanent magnets, achieving high performance and revealing the role of element GBD mechanism.

ADVANCED FUNCTIONAL MATERIALS (2022)

Add to Collection

Article Physics, Applied

High-efficient selected area grain boundary diffusion for enhancing the coercivity of thick Nd-Fe-B magnets

Jiayi He et al.

Summary: A novel approach known as selected area GBD (SAGBD) is proposed for treating thick Nd-Fe-B magnets, aiming to enhance coercivity by diffusing the source mainly from the edges and corners. Microstructure characterizations and micromagnetic simulation revealed that the edges and corners are weak magnetic areas of the magnet, and SAGBD can effectively hinder the formation of reversed domains in these areas and the rapid reversal propagation throughout the magnet.

APPLIED PHYSICS LETTERS (2022)

Add to Collection

Review Materials Science, Multidisciplinary

Significant progress of grain boundary diffusion process for cost-effective rare earth permanent magnets: A review

Zhongwu Liu et al.

Summary: This review provides a critical description of the fundamentals and development of grain boundary diffusion process (GBDP) for enhancing coercivity of Nd-Fe-B magnets. It discusses the mechanisms, cost reduction, and challenges and opportunities for future development of GBDP and cost-effective permanent magnets.

MATERIALS & DESIGN (2021)

Add to Collection

Article Materials Science, Multidisciplinary

Enhanced corrosion resistance of the surface modified Ti-13Nb-13Zr alloy by ultrasonic shot peening

Pramod Kumar et al.

Summary: The corrosion resistance of the near-beta Ti-13Nb-13Zr alloy was improved by ultrasonic shot peening treatment, primarily due to grain refinement and the increase in compressive residual stresses in the surface region. Passivation was most prominent after 30 seconds of USSP treatment, decreasing with longer durations.

CORROSION SCIENCE (2021)

Add to Collection

Article Materials Science, Multidisciplinary

Development of cost-effective nanocrystalline multi-component (Ce,La,Y)-Fe-B permanent magnetic alloys containing no critical rare earth elements of Dy, Tb, Pr and Nd

Xuefeng Liao et al.

Summary: The study reveals that La and Y have positive effects on room-temperature magnetic properties and thermal stability, with La substitution enhancing coercivity and Y substitution improving remanent polarization and thermal stability.

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY (2021)

Add to Collection

Article Chemistry, Physical

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

Qingjin Ke et al.

Summary: The phase formation, microstructure, and magnetic properties of (Nd1-2xCexYx)(14.5)Fe79.3B6.2 alloys were studied experimentally. It was found that the remanence and coercivity of the melt-spun ribbons decrease with increasing Ce and Y substitutions, while the maximum magnetic energy product decreases and then increases. Tunable magnetic properties of Nd-Fe-B ribbons with Ce and Y co-substitution could be achieved through alloy composition and phase formation.

MATERIALS (2021)

Add to Collection

Article Engineering, Electrical & Electronic