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柳昆,王书桓,冯运莉,张一昆.Sm2Fe17快淬薄带相的组成与微观形貌的综合分析[J].稀有金属材料与工程(英文),2020,49(11):3796~3802.[Kun Liu,ShuhuanWang,Yunli Feng and Yikun Zhang.The synthesize research of phases and morphology of Sm2Fe17 melt-spun ribbon[J].Rare Metal Materials and Engineering,2020,49(11):3796~3802.]
The synthesize research of phases and morphology of Sm2Fe17 melt-spun ribbon
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Received:October 15, 2019  Revised:November 05, 2019
Key words: grain morphology  wheel speed  grain agglomeration  Sm-Fe alloy
Foundation item:国家自然科学基金项目(面上项目,重点项目,重大项目)
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Kun Liu,ShuhuanWang,Yunli Feng and Yikun Zhang  
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      The effects of the quenching speed on the phase composition and morphology of the Sm-Fe alloy ribbons are measured and analyzed by X-ray diffraction (XRD), optical microscope (OM), scanning electron microscope (SEM) and transmission electron microscope (HRTEM). It was found that the size of alloy ribbons decrease along the width and thickness direction firstly with the increasing of quenching speed and maintain stability in the thickness direction even increasing the speed sequentially. The size of agglomeration also decreases in the free surface,about 0.5~3μm as the quenching speed is up to 36m/s. The XRD and EDS results show that there are three different phases in the ribbons: Sm2Fe17, α-Fe and Sm-rich phase,the main phase grain size of the ribbons is on the sub-micron scale (daver≈340nm, 36m/s), which is restricted not only by the wheel speed but also by the bare two element type. It is the first time to characterize the grain morphology by different methods.