Effect of neodymium content and niobium addition on grain growth of Nd-Fe-B powders produced by gas atomization

Sarriegui, G.; Martín, José Manuel Perlado; Burgos, N.; Ipatov, M.; Zhukov, A.; González, J.

doi:10.1016/j.matchar.2020.110844

Cited by 10 publications

(4 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The heat treatment was carried out in an alumina crucible at 1100 C for 96 h under Ar using the size fraction <150 mm. These conditions were chosen based on previous results of the group [11].…”

Section: Methodsmentioning

confidence: 99%

“…Other favorable characteristics of gas atomized powders are the spherical shape [16,17] and the low oxygen content. The typical microstructure of gas atomized powder contains Nd 2 Fe 14 B isotropic grains of approximately 5 mm, which limits the maximum remanence achieved in the magnet [11].…”

Section: Introductionmentioning

confidence: 99%

“…This HDDR powder could be an interesting material for the preparation of anisotropic bonded magnets [25]. Previous results have demonstrated that the temperature to induce grain growth in polycrystalline gas atomized particles is so high that the particles form a sintered block [11]. Consequently, hydrogen decrepitation (HD) has to be applied to transform the annealed material into loose powder before the HDDR process.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Temperature on Particle Shape, Size, and Polycrystallinity of Nd-Fe-B Powders Obtained by Hydrogen Decrepitation

Fernández

Martín

Sarriegui

et al. 2023

Preprint

View full text Add to dashboard Cite

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Temperature on Particle Shape, Size, and Polycrystallinity of Nd-Fe-B Powders Obtained by Hydrogen Decrepitation

Fernández

Martín

Sarriegui

et al. 2023

Preprint

View full text Add to dashboard Cite

“…In this case the samples will be subjected to a tangential grinding machine on a single magnetic element of the rotor at a time to simplify the test plan and to have a greater number of samples. The post-process surface integrity and the corresponding magnetic degradation were evaluated by working on a single magnet stick [9]. The CBN grinding wheel is composed of cubic-shaped grains with a CBN concentration of 40% and a porosity of 37%.…”

Section: Magnets Grindingmentioning

confidence: 99%

The effects of dry grinding processing parameters on the electromagnetic and geometrical properties of Nd2Fe14B permanent magnets

Cestone

2023

Materials Research Proceedings

View full text Add to dashboard Cite

Abstract. The automotive industry has grown increasingly interested in electric propulsion over the past few years, which has led to an increase in engine and battery efficiency improvements. The study of rare earth permanent magnets has recently become essential for the development and improvement of electric engines because rotors are constructed of permanent magnets that interact with the stator windings. Due to its strong remanence and coercive field, neodymium magnet is the most frequent rare earth employed in electric motors. Nd2Fe14B magnets are made by sintering in the simple geometries of prismatic, cubic, and cylindrical, and they typically require machining to achieve the final shape necessary for the construction and assembly of the rotor. However, prismatic Nd2Fe14B row materials that have just been sintered are extremely brittle and challenging to produce; as a result, they are typically finished through grinding with a CBN grinding wheel. This study's objective is to evaluate the effects of a dry grinding process with a wet traditional one through an experimental campaign. Process parameters such as cutting speed and feed rate were varied and surface roughness and morphology were compared, together with the magnetic field loss due to the increment of the temperature occurring during the processes. Due to the large number of electric motors that are anticipated to be manufactured in the upcoming years, dry grinding could represent the turning point in terms of eco-sustainability of the process.

show abstract

Effects of the original state of sodium-based additives on microstructure, surface characteristics and filtration performance of SiC membranes

Xie

Jiang

et al. 2023

Chinese Journal of Chemical Engineering

View full text Add to dashboard Cite

Effect of neodymium content and niobium addition on grain growth of Nd-Fe-B powders produced by gas atomization

Cited by 10 publications

References 53 publications

Effect of Temperature on Particle Shape, Size, and Polycrystallinity of Nd-Fe-B Powders Obtained by Hydrogen Decrepitation

Effect of Temperature on Particle Shape, Size, and Polycrystallinity of Nd-Fe-B Powders Obtained by Hydrogen Decrepitation

The effects of dry grinding processing parameters on the electromagnetic and geometrical properties of Nd2Fe14B permanent magnets

Effects of the original state of sodium-based additives on microstructure, surface characteristics and filtration performance of SiC membranes

Contact Info

Product

Resources

About