Remarkable improvement of the coercivity of TbMn6Sn6 compound by melt-spinning process
Remarkable improvement of the coercivity of TbMn6Sn6 compound by melt-spinning process
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DOI：
10.1088/1009-1963/10/9/319
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发表时间：
2001-09
期刊：
影响因子：
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通讯作者：
Zhao Peng;Shao-ying Zhang;Hong-wei Zhang;Yan Aru;Bao-gen Shen
中科院分区：
文献类型：
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作者：
Zhao Peng;Shao-ying Zhang;Hong-wei Zhang;Yan Aru;Bao-gen Shen
采用快淬工艺制备了TbMn_6Sn_6化合物，并对其磁性能进行了研究。对于以40 m/s速率淬火并在545 K退火30 min的TbMn 6Sn 6薄带，室温下的矫顽力最高可达0.6T，远高于TbMn 6Sn 6铸锭的矫顽力。随着温度的降低，铸锭和薄带的结晶度都将增加。对于薄带，在较低的温度下，结晶性得到了较大的改善。显微组织研究表明，TbMn 6Sn 6合金薄带中纳米晶分布均匀，晶界处有少量的富Tb相。薄带中所观察到的磁硬化的显著改善被认为是由于均匀的纳米级微结构和晶界处的畴壁钉扎。
The melt-spinning process has been carried out to improve the hard-magnetic properties of the TbMn6Sn6 compound. For the TbMn6Sn6 ribbons quenched at a rate of 40m/s and annealed at 545K for 30min, the highest coercivity of about 0.6T is achieved at room temperature, which is much higher than that of the TbMn6Sn6 ingot. Both the ingot and the ribbon coercivities will increase with decreasing temperature. For ribbons, a greater improvement of coercivity has been made at lower temperatures. Microstructural studies show the uniform nanocrystalline distribution in the TbMn6Sn6 ribbons and a small amount of Tb-rich phase in grain boundaries. The observed remarkable improvement of magnetic hardening in ribbons is believed to arise from the uniform nanoscale microstructure and the domain-wall pinning at the grain boundaries.