Defects evolution of nanoporous AuAg(Pt) during thermal coarsening

IMR OpenIR

	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
发表期刊	SCRIPTA MATERIALIA
ISSN	1359-6462
卷号	119 页码:51-54
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.
部门归属	[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
关键词	Nanoporous Gold Positron Annihilation Vacancy Defects Thermal Coarsening
学科领域	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
资助者	National Basic Research Program of China [2012CB937502]
收录类别	sci
语种	英语
WOS记录号	WOS:000375814200012
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/75818
专题	中国科学院金属研究所
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.
推荐引用方式 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.