IMR OpenIR
A critical relative density and a break-and-reconnect model for annealing-induced densification in nanoporous gold
Xie, Hui1; Guan, Huai1,2; Liu, Ling-Zhi1; Jin, Hai-Jun1
Corresponding AuthorJin, Hai-Jun(hjjin@imr.ac.cn)
2021-05-01
Source PublicationACTA MATERIALIA
ISSN1359-6454
Volume209Pages:10
AbstractSingle-crystal or coarse-grained nanoporous gold (NPG) prepared by dealloying is considered stable against sintering or densification during annealing. Herein, we report that this phenomenon only applies to high-density NPG with relative density (phi) exceeding a critical value of 0.31, which densifies very slightly during annealing. In low-density NPG with phi < 0.31, annealing induces excessive shrinkage that increases with decreasing v. Sintering along grain boundaries may account for the small densification of high-density NPG, but it fails to explain the excessive shrinkage of low-density NPG. This densification may be linked to ligament pinch-off, which dominates the coarsening of NPG with phi below similar to 0.30. However, ligament pinch-off does not directly lead to densification. Instead, we suggest that reattachment of dangling ligaments (generated by pinch-offs) is responsible for the large shrinkage in low-density NPG. This break-and-reconnect scenario is supported by quasi-in situ scanning electron microscopy observations and the evolution of scaled genus density for different type of NPGs during annealing. Our findings suggest that annealing-induced densification can be suppressed by increasing the relative density of NP metals to above 0.31, which is critical to many mechanical and functional explorations. (C) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
KeywordNanoporous Gold Coarsening Densification Pinch-off Relative density
Funding OrganizationNational Natural Science Foundation of China ; National Key R&D Program of China
DOI10.1016/j.actamat.2021.116806
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51971218] ; National Key R&D Program of China[2017YFA0204401]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000641587000002
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/161785
Collection中国科学院金属研究所
Corresponding AuthorJin, Hai-Jun
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Xie, Hui,Guan, Huai,Liu, Ling-Zhi,et al. A critical relative density and a break-and-reconnect model for annealing-induced densification in nanoporous gold[J]. ACTA MATERIALIA,2021,209:10.
APA Xie, Hui,Guan, Huai,Liu, Ling-Zhi,&Jin, Hai-Jun.(2021).A critical relative density and a break-and-reconnect model for annealing-induced densification in nanoporous gold.ACTA MATERIALIA,209,10.
MLA Xie, Hui,et al."A critical relative density and a break-and-reconnect model for annealing-induced densification in nanoporous gold".ACTA MATERIALIA 209(2021):10.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Xie, Hui]'s Articles
[Guan, Huai]'s Articles
[Liu, Ling-Zhi]'s Articles
Baidu academic
Similar articles in Baidu academic
[Xie, Hui]'s Articles
[Guan, Huai]'s Articles
[Liu, Ling-Zhi]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Xie, Hui]'s Articles
[Guan, Huai]'s Articles
[Liu, Ling-Zhi]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.