Defects evolution in nanoporous Au(Pt) during dealloying

IMR OpenIR

	Defects evolution in nanoporous Au(Pt) during dealloying
	Gao, Panpan; Zhu, Zhejie; Ye, Xinglong; Wu, Yichu; Jin, Haijun; Volinsky, Alex A.; Qiao, Lijie; Su, Yanjing; volinsky@usf.edu; yjsu@ustb.edu.cn
	2016
Source Publication	SCRIPTA MATERIALIA
ISSN	1359-6462
Volume	113 Pages:68-70
Abstract	The vacancies and small voids evolution within the ligaments of nanoporous (np) Au(Pt) in dealloying processes were investigated by positron annihilation spectroscopy. The np Au(Pt) samples with 5-8 nm ligaments were prepared by electrochemical dealloying of (Au0.95Pt0.05)(25)Ag-75 ingots. The positron lifetime of as-prepared np Au(Pt) consists of the two main components. One is assigned to the positron annihilation at vacancies within the nano-ligaments and the other to the positron annihilation in the enclosed voids in the ligaments. Vacancy concentration increased significantly when silver atoms leached out further from the np structure, which supports the vacancy-mediated lattice diffusion mechanism of porosity evolution. (C) 2015 Elsevier Ltd. All rights reserved.
description.department	[gao, panpan ; qiao, lijie ; su, yanjing] univ sci & technol beijing, key lab environm fracture moe, ctr corros & protect, beijing 100083, peoples r china ; [zhu, zhejie ; wu, yichu] wuhan univ, sch phys & technol, hubei nucl solid phys key lab, wuhan 430072, peoples r china ; [ye, xinglong ; jin, haijun] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china ; [volinsky, alex a.] univ s florida, dept mech engn, tampa, fl 33620 usa
Keyword	Nanoporous Gold Positron Annihilation Vacancy Defects
Funding Organization	National Basic Research Program of China [2012CB937502]
Indexed By	sci
Language	英语
Document Type	期刊论文
Identifier	http://ir.imr.ac.cn/handle/321006/74708
Collection	中国科学院金属研究所
Corresponding Author	volinsky@usf.edu; yjsu@ustb.edu.cn
Recommended Citation GB/T 7714	Gao, Panpan,Zhu, Zhejie,Ye, Xinglong,et al. Defects evolution in nanoporous Au(Pt) during dealloying[J]. SCRIPTA MATERIALIA,2016,113:68-70.
APA	Gao, Panpan.,Zhu, Zhejie.,Ye, Xinglong.,Wu, Yichu.,Jin, Haijun.,...&yjsu@ustb.edu.cn.(2016).Defects evolution in nanoporous Au(Pt) during dealloying.SCRIPTA MATERIALIA,113,68-70.
MLA	Gao, Panpan,et al."Defects evolution in nanoporous Au(Pt) during dealloying".SCRIPTA MATERIALIA 113(2016):68-70.

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