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Effects of Sm content on crystallized structure and magnetic properties of Co80-xSmxb20 amorphous alloys

《钢铁研究学报:英文版》2020年 第4期 | Lei-qiang Lai Yan-hui Li Feng Bao Wei Zhang   Key Laboratory of Materials Modification by Laser Ion and Electron Beams(Ministry of Education) School of Materials Science and Engineering Dalian University of Technology Dalian 116024 Liaoning China
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摘 要:The formation,thermal stability,crystallized structure,and magnetic properties of melt-spun Co80-xSmxB20(x=0–20)amorphous alloys have been investigated.A single amorphous phase is formed for the alloys with x=0–15.The first crystallization temperature gradually increases from 670 to 955 K as x increases from 0 to 10,and decreases to 836K when x=15.After optimum annealing,the nanocomposite structure consisting of SmCo12B6+fcc-Co+Sm2Co17 phases is formed for the alloys with x=5 and 7.5,and SmCo12B6+Sm2Co17+SmCo3,SmCo12B6+Sm2Co17+SmCo4B,and SmCo12B6+SmCo4B phases are formed for the alloys with x=10,12.5,and 15,respectively.The coercivity of the annealed alloys increases remarkably from 103.5 to 1249.4 kA m^-1 as x increases from 5 to 15,while the magnetization at the applied field of 2.0T decreases from 0.51 to 0.16T.The improved magnetic hardness with rising Sm content is attributed to the formation of the hard magnetic phases with higher magnetocrystalline anisotropy and the increase in their volume fraction.
【分 类】【工业技术】 > 金属学与金属工艺 > 金属学与热处理
【关键词】 Co-Sm-B alloy MELT-SPUN Amorphous alloy Crystallized structure Magnetic property
【出 处】 《钢铁研究学报:英文版》2020年 第4期 471-476页 共6页
【收 录】 中文科技期刊数据库