Considerable knock-on displacement of metal atoms under a low energy electron beam

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	Considerable knock-on displacement of metal atoms under a low energy electron beam
	Gu, Hengfei ; Li, Geping ; Liu, Chengze ; Yuan, Fusen ; Han, Fuzhou ; Zhang, Lifeng ; Wu, Songquan
刊名	SCIENTIFIC REPORTS
	2017-03-15
卷号	7 页码:-
ISSN号	2045-2322
通讯作者	Li, GP (reprint author), Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China. ; Li, GP (reprint author), Univ Sci & Technol China, 96 Jinzhai Rd, Hefei 230026, Peoples R China.
中文摘要	Under electron beam irradiation, knock-on atomic displacement is commonly thought to occur only when the incident electron energy is above the incident-energy threshold of the material in question. However, we report that when exposed to intense electrons at room temperature at a low incident energy of 30 keV, which is far below the theoretically predicted incident-energy threshold of zirconium, Zircaloy-4 (Zr-1.50Sn-0.25Fe-0.15Cr (wt.%)) surfaces can undergo considerable displacement damage. We demonstrate that electron beam irradiation of the bulk Zircaloy-4 surface resulted in a striking radiation effect that nanoscale precipitates within the surface layer gradually emerged and became clearly visible with increasing the irradiation time. Our transmission electron microscope (TEM) observations further reveal that electron beam irradiation of the thin-film Zircaly-4 surface caused the sputtering of surface alpha-Zr atoms, the nanoscale atomic restructuring in the alpha-Zr matrix, and the amorphization of precipitates. These results are the first direct evidences suggesting that displacement of metal atoms can be induced by a low incident electron energy below threshold. The presented way to irradiate may be extended to other materials aiming at producing appealing properties for applications in fields of nanotechnology, surface technology, and others.
学科主题	Multidisciplinary Sciences
收录类别	SCI
语种	英语
公开日期	2017-08-17
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/78231]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	Gu, Hengfei,Li, Geping,Liu, Chengze,et al. Considerable knock-on displacement of metal atoms under a low energy electron beam[J]. SCIENTIFIC REPORTS,2017,7:-.
APA	Gu, Hengfei.,Li, Geping.,Liu, Chengze.,Yuan, Fusen.,Han, Fuzhou.,...&Wu, Songquan.(2017).Considerable knock-on displacement of metal atoms under a low energy electron beam.SCIENTIFIC REPORTS,7,-.
MLA	Gu, Hengfei,et al."Considerable knock-on displacement of metal atoms under a low energy electron beam".SCIENTIFIC REPORTS 7(2017):-.