| 310 ℃和350 ℃下锆-4合金中沉淀相非晶化研究 |
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| 引用本文： | 祖小涛,孙凯,尤力平,王鲁闽.310 ℃和350 ℃下锆-4合金中沉淀相非晶化研究[J].强激光与粒子束,2005,17(2):287-290. |
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| 作者姓名： | 祖小涛 孙凯 尤力平 王鲁闽 |
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| 作者单位： | 1.电子科技大学 应用物理系,四川 成都 61 0054; |
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| 基金项目： | 国家自然科学基金委 中国工程物理研究院联合基金资助课题(10376006)，四川省青年科技基金资助课题(03ZQ026 059) |
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| 摘 要： | 用大束流加速器和透射电子显微镜研究了Zr-4合金在310 ℃和350 ℃下的质子辐照效应。当质子能量为2 MeV，在310 ℃和350 ℃下质子辐照产生原子离位损伤达5 dpa（注量率为8.5×1013 cm-2·s-1），辐照前后的明场像、高分辨相和电子衍射花样均表明:在310 ℃辐照产生原子损伤达到5 dpa，沉淀相Zr(Cr,Fe)2边缘5～10 nm的区域已经非晶化，而在350 ℃时质子辐照却没有非晶化发生。沉淀相Zr(Cr,Fe)2的元素分布图像和浓度分布表明，铁元素向基体扩散并且聚集在非晶化边界区域。
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| 关 键 词： | 锆-4合金 质子辐照效应 非晶化 透射电镜 元素分布 原子离位损伤 |
| 文章编号： | 1001-4322(2005)02-0287-04 |
| 收稿时间： | 2004/2/2 |
| 修稿时间： | 2004年2月2日 |
Amorphization of precipitates in Zr-4 alloy at 310 and 350℃ |
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| ZU Xiao-tao,SUN Kai,YOU Li-ping,WANG Lu-min.Amorphization of precipitates in Zr-4 alloy at 310 and 350℃[J].High Power Laser and Particle Beams,2005,17(2):287-290. |
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| Authors: | ZU Xiao-tao SUN Kai YOU Li-ping WANG Lu-min |
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| Institution: | 1.Department of Applied Physics,University of Electronic Science and Technology of China,Chengdu 610054,China;2.Department of Nuclear Engineering and Radiological Sciences,University of Michigan,Ann Arbor,Michigan 48109,USA;3.TEM Center,Peking University,Beijing 100871,China |
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| Abstract: | Proton irradiation at temperatures of 310 and 350 ℃ has been researched using 2 MeV proton to a atom displacement damage level of 5 dpa at a dose rate of 8.5×1013 cm-2·s-1. Amorphization and Fe loss of Zr(Cr,Fe)1 and ZrFe1 precipitates are observed. No amorphization appears in ZrFe1 precipitates at 310 and 350 ℃. Proton irradiation at 350 ℃ does not lead to measurable amorphization or elemental redistribution. An amorphous rim is observed on the surface of Zr(Fe,Cr)1 precipitates, the thickness of which is 5～10 nm, in both a conventional and high-resolution TEM micrograph at 310 ℃. A bright rim is observed in the Fe map, less than 10 nm wide, indicating Fe segregation. Energy-filtered images indicate Fe accumulation in the matrix near the precipitate. |
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| Keywords: | Zircaloy 4 Irradiation Amorphization TEM observation Elemental redistribution Atom dispacement damage |
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