辐照诱发中间相Zr(Cr,Fe)2非晶化的原位电子显微研究

祖小涛; 张传飞; 向霞; 吴继红; 赵文金; 王鲁闽

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辐照诱发中间相Zr(Cr,Fe)2非晶化的原位电子显微研究

1.
电子科技大学应用物理系, 四川成都 61 0054;
2.
中国工程物理研究院核物理与化学研究所, 四川绵阳 621 900;
3.
中国核动力研究设计院核燃料及材料国家重点实验室, 四川成都 61 0041 ;
4.
Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 481 09, USA

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- 刊出日期: 2003-07-15

Ionirradiationinduced amorphization of Zr(Cr,Fe)2 precipitate

1.
Department of Applied Physics,University of Electronic Science and Technology of China,Chengdu 610054,China;
2.
Institute of Nuclear Physics and Chemistry,CAEP,Mianyang 621900,China;
3.
National Key Laboratory for Nuclear Fuel and Material,Chengdu 610041,China;
4.
Department of Nuclear Engineering and Radiological Sciences,University of Michigan,Ann Arbor,MI 48109,USA

摘要

摘要: 在美国Argonne国家实验室连接有IVEM-Tandem National Facility加速器的Hitatch3000电子显微镜上，通过能量600keV及注量率为2.5×1012cm-2·s-1的Ne离子原位辐照,研究了锆-4合金中沉淀相hcp Zr(Cr,Fe)2的重离子辐照效应，结果表明：600keV的Ne离子在350℃原位辐照至0.2dpa时，hcp-Zr(Cr,Fe)2沉淀相的层错条纹开始消失；0.8dpa时沉淀相的电子衍射斑点大部分消失，发生明显的化学无序；2.7dpa时明场像衬度完全消失，非晶环已非常明显，表明沉淀相已经非晶化。600keV的Ne离子在350℃辐照hcp-Zr(Cr,Fe)2相非晶化的临界损伤离位率约为2.7dpa。
- 锆合金 /
- 重离子辐照 /
- 非晶化转变 /
- 原位电子显微观察
Abstract: The 600keV Ne+ ion irradiation and insitu TEM observation were performed in a Zircaloy 4 using the HVEMTandem Facility at 350℃, and the ion flux was 2.5×1012cm-2·s-1. The structural damage upon irradiation was monitored by the selected area electron diffraction patterns (SAED) under insitu TEM observations. The amorphization transformation was determined by the disappearance of all diffraction maxima in the SAED patterns and microstructural contrast. The results show that in situ 600keV Ne irradiation at 350℃, stacking fault contrast starts fading up to 0.2dpa, and disappears basically up to 0.4dpa, and the disorder of Zr(Cr,Fe)2 precipitate happens at the same time. The Zr(Cr,Fe)2 precipitate becomes amorphous at a dose of about 2.7dpa.
- zircaloy 4 /
- heavy ion irradiation /
- amorphization /
- insitu tem observation

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文章访问数: 2020
HTML全文浏览量: 269
PDF下载量: 556
被引次数: 0

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辐照诱发中间相Zr(Cr,Fe)2非晶化的原位电子显微研究

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Ionirradiationinduced amorphization of Zr(Cr,Fe)2 precipitate

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