Magnetic Hardening of Rapidly Quenched Co-M-Zr (M=B, Fe) Alloys

Effects of the quenching rate and annealing temperature on hard magnetic properties of rapidly quenched Co_84-x B_x Zr₁₆ and Co_82-xFe_xZr₁₈ alloys were studied. The B- or Fe-content dependence of room temperature coercivity H_c, remanence B_r and maximum energy product (BH)_max are obtained. The H_c is suggested to originate from the microstructure with the optimal grain size.