Phase formation, microstructure and magnetic properties investigation in Cu and Fe substituted SmCo_5 melt-spun ribbons

摘要

Magnetic properties and microstructure were investigated in Sm_(17.24)Co_(66.20)Cu_(8.28)Fe_(8.28) ribbons melt-spun at different wheel speeds of 5, 15, 30, 40 and 50 m/s. X-ray diffraction studies revealed that the ribbons melt-spun at lower wheel speed (<15 m/s) were comprised of three phases viz. SmCo_7, Sm_2Co_7 and SmCo_5, while higher wheel speed ribbons exhibited single phase SmCo_5. The coercivity was found to increase with increase of the wheel speed. A high coercivity of approx 33 kOe was obtained in ribbon prepared at 50 m/s.