烧结工艺对2:17型SmCo合金磁性能的影响探究  

Research on the effect of sintering process on themagnetic properties of 2∶17-type SmCo alloy

作　　者：张晨 李岩 吕科 任少卿 张中烨 赵明静[2] ZHANG Chen;LI Yan;LYU Ke;REN Shaoqing;ZHANG Zhongye;ZHAO Mingjing(Materials Science and Engineering School,Inner Mongolia University of Science and Technology,Baotou 014010,China;State Key Laboratory of Bayan Obo Rare Earth Resources Research and Comprehensive Utilization,Baotou Rare Earth Research Institute,Baotou 014030,China;Materials Science and Engineering School,Zhejiang University,Hangzhou 310030,China;Science School,Shandong Jianzhu University,Jinan 250101,China)

机构地区：[1]内蒙古科技大学材料科学与工程学院,内蒙古包头014010 [2]包头稀土研究院白云鄂博稀土资源研究与综合利用国家重点实验室,内蒙古包头014030 [3]浙江大学材料科学与工程学院,浙江杭州310030 [4]山东建筑大学理学院,山东济南250101

出　　处：《内蒙古科技大学学报》2024年第2期123-128,共6页Journal of Inner Mongolia University of Science and Technology

基　　金：科技兴蒙上海交通大学专项(2023XYJG0001-01-03);北方稀土企业项目(2022H2424,2022Z2446,2022H2390)。

摘　　要：采用传统粉末冶金工艺制备了2∶17型SmCo合金,研究了烧结温度1195~1210℃对磁体微观结构和磁性能的影响。烧结态磁体主要由2∶17H相和1∶5H相组成。随烧结温度的升高,相组成不变,而晶粒平均粒径由43.51μm生长至75.71μm。从1195℃提升至1210℃的过程中,剩磁B_(r)、内禀矫顽力H_(cj)、最大磁能积(BH)_(max)和密度ρ均随温度的升高先增大后减小,并在1200℃时得到了B_(r)=11.12 kGs、ρ=8.2747 g/cm^(3)的最佳烧结态磁体,同时磁体内铜元素分布相对均匀,磁体获得高磁性能。对比终态磁性能,发现剩磁B_(r)和密度ρ的提升主要完成于烧结阶段。In this research,with the 2∶17-type SmCo alloy prepared through traditional powder metallurgy process,the effect of the increase 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 43.51μm to 75.71μm.The remanence B_(r),the intrinsic coercivity H_(cj),the maximum magnetic energy product(BH)_(max)and the densityρincreased and then decreased with the increase of temperatures from 1195℃to 1210℃.The best sintered magnet with B_(r)=11.12 kGs andρ=8.2747 g/cm^(3)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 B_(r)and densityρwas mainly completed in the sintering stage.

关 键 词：2:17型SmCo永磁材料 烧结温度 磁性能 微观组织结构 

分 类 号：TG156.31[金属学及工艺—热处理]