稀土元素对Al-Ni-Gd-Y合金晶化行为的影响

宋洪海; 段辉平; 马朝利; 张 涛

稀土元素对Al-Ni-Gd-Y合金晶化行为的影响

北京航空航天大学材料科学与工程学院, 北京 100191

基金项目: 国家重点基础研究发展计划资助项目(2007CB613900); 国家自然科学基金资助项目(50631010,50771006); 长江学者和创新团队发展计划资助项目(IRT0512)

详细信息

作者简介:
宋洪海(1983-),男,广西柳州人,硕士生,couloursea@126.com.

中图分类号: TG 13
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出版历程
- 收稿日期: 2008-08-10
- 网络出版日期: 2009-05-31

Effects of rare-earth (RE) elements on crystallization behavior of Al-Ni-Gd-Y amorphous alloy

School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

摘要

摘要: 利用差示扫描量热仪(DSC)、X射线衍射(XRD)、透射电镜(TEM)研究了稀土元素(RE)对Al-Ni-Gd-Y非晶合金晶化行为的影响.Al-Ni-Gd-Y非晶合金的初始晶化温度随着稀土元素含量的增加而升高.在Al_(88-x)Ni₆Gd₆Y_x( x =1,2,3,4)系中,随着Y含量的增加,初始晶化产物由面心立方Al(fcc-Al)变成为fcc-Al+Al₃Gd/Al₃Y+未知相.研究了热处理工艺对Al₈₆Ni₈Gd₃Y₃合金力学性能的影响,其中,当Al₈₆Ni₈Gd₃Y₃在568K下保温10min时,其显微硬度及韧性较高,析出尺寸为1~3nm的fcc-Al纳米晶颗粒.
- 稀土元素 /
- 非晶合金 /
- 晶化 /
- 力学性能
Abstract: The effects of rare-earth (RE) elements on the crystallization behavior of Al-Ni-Gd-Y amorphous alloy were investigated by differential scanning calorimetry(DSC), X-ray diffraction(XRD) and transmission electron microscopy(TEM). The first crystallization temperature of Al-Ni-Gd-Y amorphous alloy increases with RE content. In the alloy Al_{(88- x )}Ni₆Gd₆Y_x( x =1,2,3,4), the crystallization phase changes from fcc-Al to fcc-Al+Al₃Gd/Al₃Y+unknown phase when the Y content increasing. The effect of heat-treatment on the mechanical property of Al-Ni-Gd-Y alloy was also investigated. The Al₈₆Ni₈Gd₃Y₃ alloy was of high microhardness and good ductility after heat-treatment at 568K for 10min and fine precipitation of fcc Al with size of 1~3nm was found in the alloy.
- rare-earth elements (RE) /
- amorphous alloy /
- crystallization /
- mechanical properties

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参考文献(1)

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