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Defects evolution of nanoporous AuAg(Pt) during thermal coarsening
Gao, Panpan; Ye, Xinglong; Zhu, Zhejie; Wu, Yichu; Volinsky, Alex A.; Qiao, Lijie; Su, Yanjing; Su, YJ (reprint author), Univ Sci & Technol Beijing, Ctr Corros & Protect, Key Lab Environm Fracture MOE, Beijing 100083, Peoples R China.
2016-07-01
Source PublicationSCRIPTA MATERIALIA
ISSN1359-6462
Volume119Pages:51-54
AbstractVacancies and voids evolution within the nanoporous (np) AuAg(Pt) ligaments during thermal coarsening was investigated by positron annihilation spectroscopy and scanning electron microscopy (SEM). Partially dealloyed ternary np AuAg(Pt) samples with 5-8 nm ligaments were prepared by electrochemical dealloying of (Au0.95Pt0.05)(25)Ag-75 ingots. Positron lifetime experiments demonstrated that nano-ligaments are stable against coarsening below 320 degrees C. Vacancies play an essential role during the coarsening process. Lifetime parameters changed above 320 degrees C, associated with a large number of vacancies and divacancies formed via coarsening with large enclosed voids formed at the same time. SEM images demonstrate ligaments growing non uniformly during thermal coarsening. (C) 2016 Elsevier Ltd. All rights reserved.
description.department[gao, panpan ; qiao, lijie ; su, yanjing] univ sci & technol beijing, ctr corros & protect, key lab environm fracture moe, beijing 100083, peoples r china ; [ye, xinglong] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china ; [zhu, zhejie ; wu, yichu] wuhan univ, sch phys & technol, hubei nucl solid phys key lab, wuhan 430072, peoples r china ; [volinsky, alex a.] univ s florida, dept mech engn, tampa, fl 33620 usa
KeywordNanoporous Gold Positron Annihilation Vacancy Defects Thermal Coarsening
Subject AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Basic Research Program of China [2012CB937502]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/75818
Collection中国科学院金属研究所
Corresponding AuthorSu, YJ (reprint author), Univ Sci & Technol Beijing, Ctr Corros & Protect, Key Lab Environm Fracture MOE, Beijing 100083, Peoples R China.
Recommended Citation
GB/T 7714
Gao, Panpan,Ye, Xinglong,Zhu, Zhejie,et al. Defects evolution of nanoporous AuAg(Pt) during thermal coarsening[J]. SCRIPTA MATERIALIA,2016,119:51-54.
APA Gao, Panpan.,Ye, Xinglong.,Zhu, Zhejie.,Wu, Yichu.,Volinsky, Alex A..,...&Su, YJ .(2016).Defects evolution of nanoporous AuAg(Pt) during thermal coarsening.SCRIPTA MATERIALIA,119,51-54.
MLA Gao, Panpan,et al."Defects evolution of nanoporous AuAg(Pt) during thermal coarsening".SCRIPTA MATERIALIA 119(2016):51-54.
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