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;;
AbstractThe 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
KeywordNanoporous Gold Positron Annihilation Vacancy Defects
Funding OrganizationNational Basic Research Program of China [2012CB937502]
Indexed Bysci
Document Type期刊论文
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.,...& 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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