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Effects of Cold Rolling and Annealing Prior to Dealloying on the Microstructure of Nanoporous Gold

The properties of nanoporous gold (NPG) were known to be dependent on the microstructure of NPG. In this study, the effects of cold rolling and annealing of the original Ag(0.7)Au(0.3) alloy on the microstructure of NPG produced by dealloying under free corrosion condition were investigated. Ag(0.7)...

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Autores principales: Hui, Hanyu, Xia, Re, Li, Juying, Mei, Qingsong, Ma, Ye, Chen, Feng, Lei, Yan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6070941/
https://www.ncbi.nlm.nih.gov/pubmed/30021948
http://dx.doi.org/10.3390/nano8070540
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author Hui, Hanyu
Xia, Re
Li, Juying
Mei, Qingsong
Ma, Ye
Chen, Feng
Lei, Yan
author_facet Hui, Hanyu
Xia, Re
Li, Juying
Mei, Qingsong
Ma, Ye
Chen, Feng
Lei, Yan
author_sort Hui, Hanyu
collection PubMed
description The properties of nanoporous gold (NPG) were known to be dependent on the microstructure of NPG. In this study, the effects of cold rolling and annealing of the original Ag(0.7)Au(0.3) alloy on the microstructure of NPG produced by dealloying under free corrosion condition were investigated. Ag(0.7)Au(0.3) alloy samples were cold-rolled to different strain levels/thickness reductions up to 98% and annealed at 900 °C for 3 h before dealloying. It was found that cold rolling and annealing of the original alloy can lead to reduced ligament and pore sizes of NPG. Moreover, post-deformation annealing of the original alloy was found to facilitate the formation of a homogeneous and continuous NPG structure. The minima of pore and ligament sizes (both being ~8 nm) with uniform distribution were obtained in the annealed sample with a thickness reduction of 60% for a dealloying time of 7 h. The present study indicated the significant effect of a pre-dealloying treatment of the original alloy (by plastic deformation and annealing) on the formation and optimization of the NPG microstructure produced by dealloying.
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spelling pubmed-60709412018-08-09 Effects of Cold Rolling and Annealing Prior to Dealloying on the Microstructure of Nanoporous Gold Hui, Hanyu Xia, Re Li, Juying Mei, Qingsong Ma, Ye Chen, Feng Lei, Yan Nanomaterials (Basel) Article The properties of nanoporous gold (NPG) were known to be dependent on the microstructure of NPG. In this study, the effects of cold rolling and annealing of the original Ag(0.7)Au(0.3) alloy on the microstructure of NPG produced by dealloying under free corrosion condition were investigated. Ag(0.7)Au(0.3) alloy samples were cold-rolled to different strain levels/thickness reductions up to 98% and annealed at 900 °C for 3 h before dealloying. It was found that cold rolling and annealing of the original alloy can lead to reduced ligament and pore sizes of NPG. Moreover, post-deformation annealing of the original alloy was found to facilitate the formation of a homogeneous and continuous NPG structure. The minima of pore and ligament sizes (both being ~8 nm) with uniform distribution were obtained in the annealed sample with a thickness reduction of 60% for a dealloying time of 7 h. The present study indicated the significant effect of a pre-dealloying treatment of the original alloy (by plastic deformation and annealing) on the formation and optimization of the NPG microstructure produced by dealloying. MDPI 2018-07-18 /pmc/articles/PMC6070941/ /pubmed/30021948 http://dx.doi.org/10.3390/nano8070540 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Hui, Hanyu
Xia, Re
Li, Juying
Mei, Qingsong
Ma, Ye
Chen, Feng
Lei, Yan
Effects of Cold Rolling and Annealing Prior to Dealloying on the Microstructure of Nanoporous Gold
title Effects of Cold Rolling and Annealing Prior to Dealloying on the Microstructure of Nanoporous Gold
title_full Effects of Cold Rolling and Annealing Prior to Dealloying on the Microstructure of Nanoporous Gold
title_fullStr Effects of Cold Rolling and Annealing Prior to Dealloying on the Microstructure of Nanoporous Gold
title_full_unstemmed Effects of Cold Rolling and Annealing Prior to Dealloying on the Microstructure of Nanoporous Gold
title_short Effects of Cold Rolling and Annealing Prior to Dealloying on the Microstructure of Nanoporous Gold
title_sort effects of cold rolling and annealing prior to dealloying on the microstructure of nanoporous gold
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6070941/
https://www.ncbi.nlm.nih.gov/pubmed/30021948
http://dx.doi.org/10.3390/nano8070540
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