scholarly journals Diffusion temperature dependent microstructure and magnetic properties of TbHx grain boundary diffused Nd–Fe–B magnets

AIP Advances ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 025208
Author(s):  
Yang Zhao ◽  
Haibo Feng ◽  
Anhua Li ◽  
Wei Li
Keyword(s):  
Magnetic Properties ◽  
Grain Boundary ◽  
Temperature Dependent ◽  
Diffusion Temperature ◽  
Microstructure And Magnetic Properties

scholarly journals Microstructure and magnetic properties of grain boundary modified recycled Nd-Fe-B sintered magnets

2017 ◽  
Vol 694 ◽  
pp. 175-184 ◽  
Author(s):  
H. Sepehri-Amin ◽  
T. Ohkubo ◽  
M. Zakotnik ◽  
D. Prosperi ◽  
P. Afiuny ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Grain Boundary ◽  
Sintered Magnets ◽  
Microstructure And Magnetic Properties

Microstructure and Magnetic Properties of NdFeB Magnets Using Fluorides Nano-Coated Process

2010 ◽  
Vol 638-642 ◽  
pp. 1357-1361 ◽  
Author(s):  
Matahiro Komuro ◽  
Yuichi Satsu ◽  
Hiroyuki Suzuki
Keyword(s):  
Magnetic Properties ◽  
Grain Boundary ◽  
Grain Boundaries ◽  
Triple Junction ◽  
Aging Process ◽  
Triple Junctions ◽  
Ndfeb Magnets ◽  
Fcc Structure ◽  
Microstructure And Magnetic Properties

Nd2Fe14B magnets could be sintered using terbium fluoride coated Nd2Fe14B powders. Fluorine atoms were segregated at the triple junctions and grain boundary after sintering and aging process. NdOF with fcc structure was grown at the triple junction. Terbium atoms were also distributed near grain boundaries by interdiffusion between the fluoride and Nd2Fe14B. No fluorine atoms were detected in Nd2Fe14B phase. The coercivity for 0.5wt% terbium fluoride coated magnet showed 1.23 MA/m which was 1.2 times higher than that for non-coated magnet with 1.04MA/m. The distribution of terbium and fluorine atoms increases the coercivity without reduction of remanence.

Effects of Ta on the Microstructure and Magnetic Properties of FePt Thin Films

2007 ◽  
Vol 998 ◽  
Author(s):  
Sangho Jin ◽  
Sung Uk Jang ◽  
Soon-Ju Kwon
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Grain Boundary ◽  
Exchange Coupling ◽  
Single Element ◽  
Fept Film ◽  
Annealing Temperatures ◽  
Xrd Patterns ◽  
Fept Thin Films ◽  
Microstructure And Magnetic Properties

ABSTRACTWe have studied the effect of Ta on the structure, magnetic properties and the ordering temperature of FePt(Ta) thin films. The samples are prepared by the dc and rf magnetron cosputtering method with 3 single element targets. After a deposition, the samples are annealed in a vacuum at various temperatures. The XRD patterns show strong (111) peaks at all annealing temperatures, but the change in the d-spacings reveals a disorder-order transformation. The more Ta is added to the FePt, the larger the coercivity becomes. The coercivity of the FePtTa40W film annealed at 700°C reaches about two times as large as the value of the pure FePt film. The delta m curves imply that Ta atoms diffuse into the grain boundary to reduce inter-granular exchange coupling, which leads the enhancement of coercivity

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