| Structure and permanent magnetic properties of SmFex （x=3-8） melt spun ribbons during heat treatment |
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| 引用本文： | 罗阳,于敦波,李红卫,庄卫东,毛永军,陈晓霞,李扩社,刘宇超.Structure and permanent magnetic properties of SmFex （x=3-8） melt spun ribbons during heat treatment[J].中国稀土学报(英文版),2014,32(10):960-964. |
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| 作者姓名： | 罗阳 于敦波 李红卫 庄卫东 毛永军 陈晓霞 李扩社 刘宇超 |
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| 作者单位： | National Engineering Research Center for Rare Earth Materials,General Research Institute for Nonferrous Metals,Grirem Advanced Materials Co.,Ltd.,Bei-ring 100088,China |
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| 基金项目： | supported by the National High Technology Research and Development Program of China(863 Program)(2011AA03A402) |
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| 摘 要： | Compounds with the composition SmFex（x=3–8） were prepared by melt spun method at a velocity of 40 m/s and subsequent annealing at temperature between 600–1000 ℃. The crystal structures of the as-quenched and as annealed powders were investigated by XRD methods with following Rietveld analysis. The glass forming ability could be enhanced by the increase of Sm content to x≤5.Metastable Sm5Fe17-type structure existed when 3≤x≤5 and temperature was lower than 800 ℃. SmFe2-type structure could be stable up to 1000 ℃ when x〉3 and temperature was under 800 ℃. The content of SmFe2-type decreased with the increase of x value and increased with temperature lower than 800 ℃, from which SmFe2-type started to bring the transition to SmFe3-type. As for Sm5Fe17-type compounds with x=3.4, the highest coercivity of 33.6 kOe could be obtained under a velocity of 30 m/s and heat treated under 700 ℃×1h.
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| 关 键 词： | 热处理过程 结构 Rietveld分析 X射线衍射方法 属性 永磁 薄带 急冷 |
| 收稿时间： | 16 January 2014 |
Structure and permanent magnetic properties of SmFex （x=3-8） melt spun ribbons during heat treatment |
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| Abstract: | Compounds with the composition SmFex (x=3–8) were prepared by melt spun method at a velocity of 40 m/s and subsequent annealing at temperature between 600–1000 °C. The crystal structures of the as-quenched and as annealed powders were investigated by XRD methods with following Rietveld analysis. The glass forming ability could be enhanced by the increase of Sm content to x≤5. Metastable Sm5Fe17-type structure existed when 3≤x≤5 and temperature was lower than 800 °C. SmFe2-type structure could be stable up to 1000 °C when x>3 and temperature was under 800 °C. The content of SmFe2-type decreased with the increase of x value and increased with temperature lower than 800 °C, from which SmFe2-type started to bring the transition to SmFe3-type. As for Sm5Fe17-type compounds with x=3.4, the highest coercivity of 33.6 kOe could be obtained under a velocity of 30 m/s and heat treated under 700 °C×1 h. |
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| Keywords: | SmFe based compounds melt spun structure heat treatment SmFe rare earths |
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