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Light, strong, and stable nanoporous aluminum with native oxide shell

Aluminum (Al) metal is highly reactive but has excellent corrosion resistance because of the formation of a self-healing passive oxide layer on the surface. Here, we report that this native aluminum oxide shell can also stabilize and strengthen porous Al when the ligament (strut) size is decreased t...

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Autores principales: Yang, Wei, Luo, Zhao-Ping, Bao, Wei-Kang, Xie, Hui, You, Ze-Sheng, Jin, Hai-Jun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8270488/
https://www.ncbi.nlm.nih.gov/pubmed/34244136
http://dx.doi.org/10.1126/sciadv.abb9471
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author Yang, Wei
Luo, Zhao-Ping
Bao, Wei-Kang
Xie, Hui
You, Ze-Sheng
Jin, Hai-Jun
author_facet Yang, Wei
Luo, Zhao-Ping
Bao, Wei-Kang
Xie, Hui
You, Ze-Sheng
Jin, Hai-Jun
author_sort Yang, Wei
collection PubMed
description Aluminum (Al) metal is highly reactive but has excellent corrosion resistance because of the formation of a self-healing passive oxide layer on the surface. Here, we report that this native aluminum oxide shell can also stabilize and strengthen porous Al when the ligament (strut) size is decreased to the submicron or nanometer scale. The nanoporous Al with native oxide shell, which is a nanoporous Al-Al(2)O(3) core-shell composite self-organized in a galvanic replacement reaction, is nonflammable under ambient conditions and stable against coarsening near melting temperatures. This material is stronger than conventional foams of similar density consisting of pure Al or Al-based composites, and also lighter and stronger than most nanoporous metals reported previously. Its light weight, high strength, and excellent stability warrant the explorations of functional and structural applications of this material, if more efficient and scalable synthesis processes are developed in the future.
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spelling pubmed-82704882021-07-16 Light, strong, and stable nanoporous aluminum with native oxide shell Yang, Wei Luo, Zhao-Ping Bao, Wei-Kang Xie, Hui You, Ze-Sheng Jin, Hai-Jun Sci Adv Research Articles Aluminum (Al) metal is highly reactive but has excellent corrosion resistance because of the formation of a self-healing passive oxide layer on the surface. Here, we report that this native aluminum oxide shell can also stabilize and strengthen porous Al when the ligament (strut) size is decreased to the submicron or nanometer scale. The nanoporous Al with native oxide shell, which is a nanoporous Al-Al(2)O(3) core-shell composite self-organized in a galvanic replacement reaction, is nonflammable under ambient conditions and stable against coarsening near melting temperatures. This material is stronger than conventional foams of similar density consisting of pure Al or Al-based composites, and also lighter and stronger than most nanoporous metals reported previously. Its light weight, high strength, and excellent stability warrant the explorations of functional and structural applications of this material, if more efficient and scalable synthesis processes are developed in the future. American Association for the Advancement of Science 2021-07-09 /pmc/articles/PMC8270488/ /pubmed/34244136 http://dx.doi.org/10.1126/sciadv.abb9471 Text en Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
spellingShingle Research Articles
Yang, Wei
Luo, Zhao-Ping
Bao, Wei-Kang
Xie, Hui
You, Ze-Sheng
Jin, Hai-Jun
Light, strong, and stable nanoporous aluminum with native oxide shell
title Light, strong, and stable nanoporous aluminum with native oxide shell
title_full Light, strong, and stable nanoporous aluminum with native oxide shell
title_fullStr Light, strong, and stable nanoporous aluminum with native oxide shell
title_full_unstemmed Light, strong, and stable nanoporous aluminum with native oxide shell
title_short Light, strong, and stable nanoporous aluminum with native oxide shell
title_sort light, strong, and stable nanoporous aluminum with native oxide shell
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8270488/
https://www.ncbi.nlm.nih.gov/pubmed/34244136
http://dx.doi.org/10.1126/sciadv.abb9471
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