Microstructure and composition in rapidly quenched NdFeB-based hard magnet alloys
نویسندگان
چکیده
منابع مشابه
TEM INVESTIGATION OF RAPIDLY SOLIDIFIED NDFEB HARD MAGNETIC MATERIAL
The surface condition and microstructure of near stoichiometric (Fe823Ndll.8B5.9) Nd-Fe-B alloy ribbons and the effect of melt spinning parameters were investigated using optical, scanning and transmission electron microscopes (SEM, TEM). The formation of gas pockets on the roll surface of the ribbons during melt spinning can prevent heat transform and result in local coarse grains. The local t...
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Sintered NdFeB magnets are relatively complex multiphase systems containing Nd2Fe14B matrix and about 15% of other intermetallics such as Nd1+εFe4BB4, Nd-oxides (Nd-rich phase), etc. Boron rich Nd1+εFe4B4 B forms in irregularly distributed heavily faulted grains of roughly the same size as those of the Nd2Fe14B phase [1]. The Curie temperature of this phase is 13K and, therefore, it is not ferr...
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In the present work, we used Cu-Sb alloy system as a model to study grain boundary segregation in specimens prepared by rapid quenching. Ribbons of Cu-Sb alloys of single Cu phase and polycrystalline structure containing 0.01, 0.08, and 2wt% Sb prepared by single roller melt spinning were used as specimens, and the segregation was studied by using energy dispersive X-ray spectrometer attached t...
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Tb-Fe-B alloys have been melt spun and data obtained for the room temperature magnetisation and magnetostriction as functions of applied field and composition. Small additions of La (w 5 at. %) leave the magnetisation unchanged but substantially reduce the magnetostriction. Results are compared with sputtered binary metallic Tb/Fe alloys.
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ژورنال
عنوان ژورنال: Journal of Applied Physics
سال: 1996
ISSN: 0021-8979
DOI: 10.1063/1.361630