Low-energy electron-driven observation of nanometer-sized Laves phases at alloy surfaces enabling statistical characterization with high precision and efficiency

doi:10.1007/s13204-021-01796-6

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	Low-energy electron-driven observation of nanometer-sized Laves phases at alloy surfaces enabling statistical characterization with high precision and efficiency
	Gu, Hengfei 1,2; Shen, Jieli 3; Yuan, Fusen 1,4; Han, Fuzhou 1,4; Liu, Chengze 1,4; Zhang, Yingdong 1,4; Ali, Muhammad 1,4; Guo, Wenbin 1,4; Ren, Jie 1,4; Zhang, Lifeng 5
刊名	APPLIED NANOSCIENCE
	2021-03-27
页码	16
关键词	Laves phase Nanoparticle Electron irradiation Knock-on displacement Zirconium alloy Ostwald ripening Statistical characterization
ISSN号	2190-5509
DOI	10.1007/s13204-021-01796-6
通讯作者	Li, Geping(gpli@imr.ac.cn)
英文摘要	Alloys strengthened by nanometer-sized Laves phases have been used as structural components working in corrosive environments at high temperatures owing to the favorable physical and chemical properties of Laves phases. However, due to the small sizes of Laves phases in alloys, their precise characterization cannot be realized efficiently by the existing methods. We previously found that under irradiation of a polished Zircaloy-4 alloy [Zr-1.50Sn-0.25Fe-0.15Cr (wt.%)] with a focused, low-energy (30 keV) electron beam, surface Zr atoms in the alpha-phase matrix, instead of the ones in nanometer-sized Zr(Fe, Cr)(2) Laves phases, were able to undergo significant sputtering into vacuum in a field-emission scanning electron microscope (FE-SEM), resulting in the exposure of the Laves-phase nanoparticles (NPs). Based on this surprising physical phenomenon, here we successfully develop a methodology for performing statistical characterization of Laves-phase NPs in fully recrystallized Zircaloy-4 alloys as well as their partially recrystallized counterparts. By comparing the attributes of the Laves-phase NPs in both partially and fully recrystallized alloys, the conventional, tiny Ostwald ripening of the Laves phases was, for the first time, found to occur during the alloy recrystallization process. These understandings are likely to elucidate the universal mechanisms underlying the nucleation and growth of Laves-phase NPs in solid solutions.
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000633735900001
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/162028]
专题	金属研究所_中国科学院金属研究所
通讯作者	Li, Geping
作者单位	1.Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Univ Chinese Acad Sci, 19 Yuquan Rd, Beijing 100049, Peoples R China 3.Univ Sci & Technol China, Dept Stat & Finance, 96 Jinzhai Rd, Hefei 230026, Peoples R China 4.Univ Sci & Technol China, Dept Mat Sci & Engn, 96 Jinzhai Rd, Hefei 230026, Peoples R China 5.Tianjin Univ, Inst Mol Plus, Tianjin 300072, Peoples R China 6.Univ Shanghai Sci & Technol, Sch Mat Sci & Engn, Shanghai 200093, Peoples R China
推荐引用方式 GB/T 7714	Gu, Hengfei,Shen, Jieli,Yuan, Fusen,et al. Low-energy electron-driven observation of nanometer-sized Laves phases at alloy surfaces enabling statistical characterization with high precision and efficiency[J]. APPLIED NANOSCIENCE,2021:16.
APA	Gu, Hengfei.,Shen, Jieli.,Yuan, Fusen.,Han, Fuzhou.,Liu, Chengze.,...&Li, Geping.(2021).Low-energy electron-driven observation of nanometer-sized Laves phases at alloy surfaces enabling statistical characterization with high precision and efficiency.APPLIED NANOSCIENCE,16.
MLA	Gu, Hengfei,et al."Low-energy electron-driven observation of nanometer-sized Laves phases at alloy surfaces enabling statistical characterization with high precision and efficiency".APPLIED NANOSCIENCE (2021):16.