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液氮球磨Sm-Fe合金的組織演變
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Microstructure Evolution of Sm-Fe Alloy Prepared by Cryomilling in Liquid Nitrogen
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    摘要:

    利用低溫液氮球磨技術(shù)制備了Sm-Fe合金粉體，采用XRD、HRTEM和惰性氣脈沖-紅外-熱導等方法對Sm2Fe17合金粉體在液氮球磨過程中的組織演變進行了研究。結(jié)果表明，液氮球磨可加速細化Sm-Fe合金粉體。球磨5 h后，Sm-Fe合金的晶粒尺寸約為10 nm，9 h后晶粒尺寸約為5 nm。Sm-Fe合金中的氮含量隨著球磨時間的延長而增加，主軸轉(zhuǎn)速150 r/min球磨9 h后，氮含量達1.62% (質(zhì)量分數(shù), 下同)。隨著球磨時間的延長，Sm2Fe17相向非晶態(tài)轉(zhuǎn)變，降低球磨轉(zhuǎn)速可以延緩非晶的形成過程

    Abstract:

    The Sm-Fe alloy powders were prepared by cryomilling in liquid nitrogen. By means of XRD, HRTEM and Inert Gas Pulse-Infrared-Thermal Conductivity method, the microstructure evolution of the Sm2Fe17 alloy powders during the cryomilling process was studied. The results show that the grain sizes of Sm-Fe alloy powders were rapidly reduced by cryomilling in liquid nitrogen. The grain sizes of the alloy powders were about 10 nm and 5 nm after cryomilling for 5 h and 9 h, respectively. The nitrogen content in the Sm-Fe alloy powders increased with longer cryomilling time. After cryomilling at 150 r/min for 9 h, the content of nitrogen reached 1.62wt%. With increasing of the cryomilling time, the Sm2Fel7 phase changed to amorphous phase. Low cryomilling speed can slow down the formation of amorphous phases

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邱曉鋒,崔向中,楊 濱,陳漢賓.液氮球磨Sm-Fe合金的組織演變[J].稀有金屬材料與工程,2010,39(8):1484~1487.[Qiu Xiaofeng, Cui Xiangzhong, Yang Bin, Chen Hanbin. Microstructure Evolution of Sm-Fe Alloy Prepared by Cryomilling in Liquid Nitrogen[J]. Rare Metal Materials and Engineering,2010,39(8):1484~1487.]
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  • 收稿日期:2009-08-20
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