High-Performance Anisotropic Nanocomposites with a Novel Core/shell Microstructure.
ACS Appl Mater Interfaces
; 14(13): 15558-15564, 2022 Apr 06.
Article
em En
| MEDLINE
| ID: mdl-35316020
ABSTRACT
Anisotropic nanostructures of magnetically hard and soft materials are fascinating for exploring next-generation ultrastrong permanent magnets with less expensive rare-earth elements. It is a big challenge fabricating high-performance nanocomposites due to the difficulty in controlling the grain size of the soft phase. Here, surfactant-assisted low-temperature chemical coating (LTCC) is adopted to fabricate SmCo5@FeCo nanocomposites. A uniform coating layer of the soft phase ranging from 5 to 15 nm FeCo particles is obtained. Both high coercivity Hc of 17.2 kOe and high energy product (BH)max of 29.4 MGOe in the optimal anisotropic SmCo5@FeCo nanocomposites with 15 wt % soft phase coating had been successfully fabricated, which has an enhancement of 31% compared with that of the uncoated single SmCo5 phase. The excellent performance is ascribed to nanosized grains of both soft and hard phases and a high remanence ratio Mr/Ms of 0.976. These results made a big step toward synthesizing a stronger bulk nanocomposite system.
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1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
ACS Appl Mater Interfaces
Assunto da revista:
BIOTECNOLOGIA
/
ENGENHARIA BIOMEDICA
Ano de publicação:
2022
Tipo de documento:
Article