|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.
|摘要||Vacancies 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.|
; 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
|学科领域||Science & Technology - Other Topics
; Materials Science
; Metallurgy & Metallurgical Engineering
|资助者||National Basic Research Program of China [2012CB937502]
|通讯作者||Su, YJ (reprint author), Univ Sci & Technol Beijing, Ctr Corros & Protect, Key Lab Environm Fracture MOE, Beijing 100083, Peoples R China.|
Gao, Panpan,Ye, Xinglong,Zhu, Zhejie,et al. Defects evolution of nanoporous AuAg(Pt) during thermal coarsening[J]. SCRIPTA MATERIALIA,2016,119:51-54.
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.
Gao, Panpan,et al."Defects evolution of nanoporous AuAg(Pt) during thermal coarsening".SCRIPTA MATERIALIA 119(2016):51-54.