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将Nd_(8.5)Fe_(77)Co_5Zr_3B_(6.5)(at%)合金熔化至不同温度后,以18 m/s的甩带速度快淬,对淬态条带进行了退火处理,分析了其微观结构和磁性能的变化。结果表明,熔体温度对淬态及其退火态合金的微观结构和磁性能可以产生重要影响,熔体温度为1210℃时制备的快淬条带由Nd_2Fe_(14)B相和部分非晶相组成,具有一定的硬磁性;随着快淬时熔体温度的升高,淬态条带中非晶相的质量分数逐渐增加,其磁性逐渐转变为软磁性。几种合金经退火处理后均由大量Nd_2Fe_(14)B相与少量软磁相组成,熔体温度较低的合金退火后其晶粒尺寸较小,磁性能较好。熔体温度为1210℃时制备的合金退火后磁性能最佳,内禀矫顽力Hci为559.2 kA/m,剩余磁化强度Br为0.98 T,最大磁能积(BH)_(max)为127.8 kJ/m~3。
After quenching Nd_ (8.5) Fe_ (77) Co_5Zr_3B_ (6.5) (at%) alloy to different temperatures, the quenched ribbon was annealed at a quenching rate of 18 m / s, and its microstructure Changes in structure and magnetic properties. The results show that the melt temperature has an important effect on the microstructure and magnetic properties of the as-quenched and annealed alloys. The melt quenched strip prepared by melt temperature 1210 ℃ consists of Nd 2 Fe 14 B phase and some amorphous phases With a certain degree of hard magnetism. With the increase of the melt temperature during quenching, the mass fraction of the amorphous phase in the quenched strip increases gradually, and its magnetic property gradually changes to soft magnetic. After annealing, some alloys consist of a large amount of Nd 2 Fe 14 B phase and a small amount of soft magnetic phase. The alloys with lower melt temperature have smaller grain size and better magnetic properties after annealing. The alloy prepared at 1210 ℃ has the best magnetic properties after annealing, the intrinsic coercivity Hci is 559.2 kA / m, the remanent magnetization Br is 0.98 T and the maximum energy product (BH) _ (max) is 127.8 kJ / m ~ 3.