TY - GEN
T1 - Effect of composition and particle size on the soft magnetic character of Fe-rich amorphous alloys obtained by gas atomization
AU - Alvarez, Kenny L.C.
AU - Martín, José Manuel
AU - Ipatov, Mihail
AU - Domínguez, Lourdes
AU - Gonzalez, Julian
N1 - Publisher Copyright:
© European Powder Metallurgy Association (EPMA)
PY - 2019
Y1 - 2019
N2 - Fe-Si-B powders with different composition were produced by gas atomization using helium. X-ray diffraction patterns showed that as-atomized powders exhibited a mix of amorphous and crystalline phases. Nevertheless, the effect of composition on glass forming ability was noticeable. It was found one composition that is almost completely amorphous. The size fraction below 20 microns was separated by sieving and studied in more detail. In this size range, six different compositions were almost fully amorphous. Soft magnetic properties (saturation magnetization, coercivity and anisotropy field) were measured for the whole size range (as-atomized powder) and for the fraction below 20 microns. It is observed a significant improvement of the soft magnetic behaviour when the particle size decreases. This effect is connected with a larger amorphicity degree when the particle size is smaller, being more effective the random anisotropy to reduce the average magnetic anisotropy and, consequently, the coercivity.
AB - Fe-Si-B powders with different composition were produced by gas atomization using helium. X-ray diffraction patterns showed that as-atomized powders exhibited a mix of amorphous and crystalline phases. Nevertheless, the effect of composition on glass forming ability was noticeable. It was found one composition that is almost completely amorphous. The size fraction below 20 microns was separated by sieving and studied in more detail. In this size range, six different compositions were almost fully amorphous. Soft magnetic properties (saturation magnetization, coercivity and anisotropy field) were measured for the whole size range (as-atomized powder) and for the fraction below 20 microns. It is observed a significant improvement of the soft magnetic behaviour when the particle size decreases. This effect is connected with a larger amorphicity degree when the particle size is smaller, being more effective the random anisotropy to reduce the average magnetic anisotropy and, consequently, the coercivity.
UR - https://www.scopus.com/pages/publications/85101973555
M3 - Conference contribution
AN - SCOPUS:85101973555
T3 - Euro PM 2019 Congress and Exhibition
BT - Euro PM 2019 Congress and Exhibition
PB - European Powder Metallurgy Association (EPMA)
T2 - European Powder Metallurgy Congress and Exhibition, Euro PM 2019
Y2 - 13 October 2019 through 16 October 2019
ER -