【作者】 孙继兵； 杨立国； 崔春翔； 杨薇；

【Author】 SUN Ji-bing,YANG Li-guo,CUI Chun-xiang,YANG Wei (School of Materials Science & Engineering,Hebei University of Technology,Tianjin 300130,China)

【机构】 河北工业大学材料学院；

【摘要】 通过在SmCo_6.9Hf_0.1合金中加入石墨与碳纳米管（CNTs）,对电弧熔炼铸态合金及以40m/s速度熔体快淬薄带进行了研究发现,在SmCo₇铸态合金中添加Hf可以稳定TbCu₇型相结构,但Hf与C及CNTs的同时添加,对稳定TbCu₇型结构更有效。无论是否添加C或CNTs,薄带中主相均为Sm（Co,Hf）₇。添加C与CNTs可分别使SmCo_6.9Hf_0.1薄带的矫顽力提高1倍与2倍,剩磁提高37.5与54.9%,剩磁比提高18.7%与37.5%,其中SmCo_6.9Hf_0.1（CNTs）_0.05薄带的磁性能达到H_c=12.5kOe,M_r=57.0emu/g,M_r/M_2T=0.788。薄带中Sm（Co,Hf）₇主相含量增加、存在结晶各向异性及磁畴尺寸变小可以使薄带的磁性能提高。更多还原

【Abstract】 In this paper,all as-cast alloys prepared by arc melting method and ribbons melt-spun at 40 m/s were studied by means of adding graphite or carbon nanotubes（CNTs） into the SmCo_6.9Hf_0.1 alloy.It was found that Hf addition can stabilize the TbCu₇-type structure in the SmCo₇ as-cast alloy,moreover,simultaneous addition of Hf and C or CNTs is more effective in stabilizing the TbCu₇-type structure.The main phase in all ribbons is Sm（Co,Hf）₇ no matter whether C or CNTs is added or not.The C and CNTs addition increased the coercivity of SmCo_6.9Hf_0.1 ribbons over one or two times,improved the remanence by 37.5 and 54.9%and increased the remanence ratio by 18.7 and 37.5%respectively.The magnetic properties of SmCo_6.9Hf_0.1（CNTs）_0.05 ribbons reached H_c=12.5 kOe,M_r =57.0 emu/g,M_r/M_2T=0.788.The higher content of Sm（Co,Hf）₇ main phase, better crystallization anisotropy and smaller domain width can result in improving the magnetic properties of the ribbons.更多还原