摘要
对名义成分为Nd_8Fe_(73)Ti_2Zr_2B_(13.6)C_(1.4)的合金,采用不同的甩带速度(6,8,10,12,15,18,20,30 m/s)及后续的热处理工艺制备出Nd_2Fe_(14)B/α-Fe纳米晶复合永磁带。结果表明:当冷却铜辊表面线速度V_s>12 m/s时,淬态带由非晶相组成。随V_s的减小,淬态样品的析晶峰之间的温度差距增大。退火态薄带的矫顽力随甩带速度降低而提高,6 m/s淬态样品经680℃真空热处理10min后得到最大矫顽力H_(ci)=1114 kA/m。随着甩带速度的提高,退火态带的剩磁比(J_r/J_s)和磁能积(BH)_m皆表现为先增加后降低。最大剩磁比和最佳磁能积都出现在12 m/s淬态样品经780℃退火10 min状态下:J_r/J_s=0.749;(BH)_m=84.6 kJ/m^3;H_(ci)=732 kA/m,此样品淬态时为部分非晶。
Nanocomposite Nd8Ee73Ti2Zr2B13.6C1.4 permanent magnetic ribbons were prepared by melt - spinning at different wheel speeds （V =6, 8, 10, 12, 15, 18, 20, 30 m/s） and post annealing treatment. The results show that the ribbons consist of amorphous phase when the circumferential speeds Vs are more than 12 m/s. With the increase of the wheel speed, the magnetic coereivity of the annealed ribbon became worse. Optimum coereivity with Hci = 1114kA/m was obtained by annealing an as - spun sample （Vs =6 m/s） at 680℃ for 10 min. The remanenee ratio and the magnetic energy product of the annealed ribbons were improved first and then decreased with increasing the wheel speed from 6 m/s to 30 m/s. The best remanence ratio and energy product were both got from the ribbon （ 12 m/s） annealed at 780℃ for 10 min ： （ Jr/Js ） = 0. 749 ; （BH） m = 84.6kJ/m^3 ; Hci ： 732 kA/m.
出处
《功能材料与器件学报》
CAS
CSCD
北大核心
2010年第3期255-260,共6页
Journal of Functional Materials and Devices
