Grain boundary engineering towards high-figure-of-merit Nd-Ce-Fe-B sintered magnets: Synergetic effects of (Nd, Pr)Hx and Cu co-dopants
Sign Up to like & getrecommendations! Published in 2021 at "Acta Materialia"
DOI: 10.1016/j.actamat.2020.116529
Abstract: Abstract We present a potent pathway, (Nd, Pr)Hx and Cu grain boundary engineering, to tackle the trade-offs between coercivity, remanence and corrosion resistance of Nd-Ce-Fe-B sintered magnets. Concurrent improvements of magnetic and corrosive properties are… read more here.
Keywords: phase; grain boundary; figure merit; boundary engineering ... See more keywords
Effect of adding non-ferromagnetic nanoparticles to grain boundary on coercivity of sintered Nd-Fe-B magnet
Sign Up to like & getrecommendations! Published in 2017 at "Current Applied Physics"
DOI: 10.1016/j.cap.2017.12.014
Abstract: Abstract In this work, we investigated the influence of additional compounds of Nd-Cu-Al, Dy-Nb-Al, Dy-Zr-Al and Nb-Cu-Al on coercivity of sintered Nd-Fe-B magnets. The additional nanoparticles with size in the range of 40–80 nm was mixed… read more here.
Keywords: adding non; nanoparticles grain; effect adding; sintered magnets ... See more keywords
Suppression mechanism of abnormal grain growth by Zr addition in pressless processed Nd-Fe-B sintered magnets
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Alloys and Compounds"
DOI: 10.1016/j.jallcom.2021.161244
Abstract: Abstract Microstructures of pressless processed (PLP) Nd-Fe-B sintered magnets with and without Zr addition were investigated by scanning electron microscopy and scanning/transmission electron microscopy. In the Zr-free magnet, huge polygonal abnormal grains (AGs) about 100… read more here.
Keywords: growth; microscopy; addition; sintered magnets ... See more keywords
Effect of hydrogen pressure on hydrogen absorption of waste Nd-Fe-B sintered magnets
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Magnetism and Magnetic Materials"
DOI: 10.1016/j.jmmm.2018.10.071
Abstract: Abstract Hydrogen treatment technology is developed to recycle the waste Nd-Fe-B sintered magnets in the way of short route, low cost, and high efficiency. In present study, effect of hydrogen pressure on hydrogen decrepitation (HD)… read more here.
Keywords: hydrogen; waste sintered; hydrogen pressure; pressure ... See more keywords
Microstructure and annealing effects of NdFeB sintered magnets with Pr-Cu boundary addition
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Magnetism and Magnetic Materials"
DOI: 10.1016/j.jmmm.2020.166749
Abstract: Abstract The annealing effects of NdFeB magnets were usually related to the eutectic liquid segregation from junction to grain boundary regions, atoms solid diffusion at grain boundary regions or structure transition of junction phases. In… read more here.
Keywords: microstructure annealing; eutectic liquid; sintered magnets; effects ndfeb ... See more keywords
Possibility of high-performance Sm2Fe17N3 sintered magnets by low-oxygen powder metallurgy process
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Magnetism and Magnetic Materials"
DOI: 10.1016/j.jmmm.2020.166811
Abstract: Abstract Inspired by the previous result that serious coercivity deterioration of Sm2Fe17N3 powder during sintering can be overcame by suppressing surface oxidation of the powder, this study aimed to explore the possibility of high-performance Sm2Fe17N3… read more here.
Keywords: sm2fe17n3; sintered magnets; metallurgy; powder ... See more keywords
Abnormal corrosion behavior of dual-main phase sintered (Ce,Nd)-Fe-B magnets in different sodium solutions
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Rare Earths"
DOI: 10.1016/j.jre.2019.05.019
Abstract: Abstract Sintered (Ce, Nd)-Fe-B magnets with high cost performance were prepared by substituting of Ce for Nd with the dual-main phase method. The corrosion behaviors of dual-main phase sintered (CexNd1–x)30Fe69B1 (x = 0.15 wt%, 0.3 wt%) magnets, which were… read more here.
Keywords: phase; main phase; dual main; ce15 ... See more keywords
Effects of Pr-Cu-Ti intergranular addition on microstructure and magnetic properties of heavy-rare-earth-free Nd-Fe-B sintered magnets
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Rare Earths"
DOI: 10.1016/j.jre.2021.02.007
Abstract: Abstract By intergranular addition of Pr-Cu-Ti alloy powders in the Nd-Fe-B sintered magnets with the normal B component, we propose an approach to the optimization of grain boundary and local Nd-Fe-B composition system. The coercivity… read more here.
Keywords: grain boundary; addition; magnetic properties; sintered magnets ... See more keywords
Improvement of coercivity and thermal stability of Nd-Fe-B sintered magnets by intergranular addition of Tb80Fe20 alloy
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Rare Earths"
DOI: 10.1016/j.jre.2021.09.013
Abstract: Abstract To improve the coercivity and temperature stability of Nd-Fe-B sintered magnets for high-temperature applications, the eutectic Tb80Fe20 (wt%) alloy powders were intergranular added into the Nd-Fe-B sintered magnets to enhance the coercivity (Hcj) and… read more here.
Keywords: sintered magnets; tb80fe20 alloy; coercivity; stability ... See more keywords
Optimizing microstructure and magnetic properties of mischmetal-based sintered magnets by grain refinement
Sign Up to like & getrecommendations! Published in 2020 at "Materials Letters"
DOI: 10.1016/j.matlet.2020.127509
Abstract: Abstract In order to prepare high-performance low-cost sintered (Nd, MM)-Fe-B magnets, the effect of the microstructure of strip-casting alloys on the particle size and distribution of powder was first investigated in this work. By adding… read more here.
Keywords: optimizing microstructure; magnetic properties; sintered magnets; based sintered ... See more keywords
Reprint of Prospect for HRE-free high coercivity Nd-Fe-B permanent magnets
Sign Up to like & getrecommendations! Published in 2018 at "Scripta Materialia"
DOI: 10.1016/j.scriptamat.2018.05.003
Abstract: Abstract Recent state-of-the-art microstructure investigations on Nd-Fe-B sintered magnets have revealed that the Nd2Fe14B grains in conventional sintered magnets are exchange-coupled through ferromagnetic grain boundary phase and the coercivity is governed by domain wall pinning,… read more here.
Keywords: sintered magnets; coercivity; prospect hre; hre free ... See more keywords