Effect of Ni substitution on the formability and magnetic properties of Gd₅₀Co₅₀ amorphous alloy

【摘要】 A small amount of Ni was added into the binary Gd₅₀Co₅₀ amorphous alloy to replace Gd in order to obtain ternary Co₅₀Gd_50-xNi_x（x = 1, 2, and 3） amorphous alloys. Compared to the binary Gd₅₀Co₅₀ amorphous alloy, the Co₅₀Gd_50-xNi_x amorphous alloys show an enhanced Curie temperature（T_C） with a weakened formability. The maximum magnetic entropy change(-?S_m^peak) of the Co₅₀Gd_50-xNi_x amorphous alloys is found to decrease with the increasing T_C.The adiabatic temperature rise(?T_ad) of the Co₅₀Gd₄₇Ni₃ amorphous alloy is superior to that of the Fe-based metallic glasses at room temperature. The variation of the T_C and -?S_<sup>peak of the Gd₅₀Co₅₀ amorphous alloy with Ni addition, and the mechanism involved, were discussed.更多还原

【Abstract】 A small amount of Ni was added into the binary Gd₅₀Co₅₀ amorphous alloy to replace Gd in order to obtain ternary Co₅₀Gd_50-xNi_x（x = 1, 2, and 3） amorphous alloys. Compared to the binary Gd₅₀Co₅₀ amorphous alloy, the Co₅₀Gd_50-xNi_x amorphous alloys show an enhanced Curie temperature（T_C） with a weakened formability. The maximum magnetic entropy change(-?S_m^peak) of the Co₅₀Gd_50-xNi_x amorphous alloys is found to decrease with the increasing T_C.The adiabatic temperature rise(?T_ad) of the Co₅₀Gd₄₇Ni₃ amorphous alloy is superior to that of the Fe-based metallic glasses at room temperature. The variation of the T_C and -?S_<sup>peak of the Gd₅₀Co₅₀ amorphous alloy with Ni addition, and the mechanism involved, were discussed.更多还原