Research on the effect of sintering process on the magnetic properties of 2:17-type SmCo alloy
In this research,with the 2:17-type SmCo alloy prepared through traditional powder metallurgy process,the effect of the in-crease of sintering temperature from 1195℃ to 1210℃ on the microstructure and the magnetic properties of the obtained alloy was studied.The sintered magnet was mainly composed of 2:17H phase and 1:5H phase.Despite the increase of the sintering temperature,the phase composition remained unchanged,while the average grain size increased from 43.51 μm to 75.71 μm.The remanence Br,the intrinsic coercivity Hcj,the maximum magnetic energy product(BH)max and the density ρ increased and then decreased with the in-crease of temperatures from 1195℃ to 1210℃.The best sintered magnet with Br=11.12 kGs and ρ=8.2747 g/cm3 was obtained at 1200℃.At the same time,the distribution of copper elements in the magnet was relatively uniform,and the magnet obtained high magnetic properties.Comparison of the final magnetic properties revealed that the increase of remanence Br and density ρ was mainly completed in the sintering stage.
2:17-type SmCo permanent magnetic materialsintering temperaturemagnetic propertiesmicrostructure
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