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 | |
发表期刊 | SCRIPTA MATERIALIA
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ISSN | 1359-6462 |
卷号 | 113页码:68-70 |
摘要 | 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. |
部门归属 | [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 |
关键词 | Nanoporous Gold Positron Annihilation Vacancy Defects |
资助者 | National Basic Research Program of China [2012CB937502] |
收录类别 | sci |
语种 | 英语 |
WOS记录号 | WOS:000367412400017 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.imr.ac.cn/handle/321006/74708 |
专题 | 中国科学院金属研究所 |
通讯作者 | volinsky@usf.edu; yjsu@ustb.edu.cn |
推荐引用方式 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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