Formation of Co-M-Ti-B (M=Fe, Nb) Amorphous Powders by Mechanical Solid-State Reaction

摘要

Amorphous Co_70-XM_XTi₂₅B₅ (M=Fe, Nb) powders with x=5, 10, 25, 35 were synthesized by mechanical alloying technique. Substitution of Co with small amount of Fe or Nb element reduces the thermal stability of the amorphous powders. The milled amorphous Co₅₅Nb₁₅Ti₂₅B₅ powder has comparable supercooled liquid region as its ternary Co₇₀Ti₂₅B₅ counterpart. The milled Co_70-XFe_XTi₂₅B₅ alloys have lower coercive force and higher saturation magnetization than the milled Co_70-XNb_XTi₂₅B₅ alloys and show better soft magnetic properties.