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https://doi.org/10.15480/882.1701

Publisher DOI: | 10.1038/am.2015.58 | Title: | Nanoporous-gold-based composites : toward tensile ductility | Language: | English | Authors: | Wang, Ke Kobler, Aaron Kübel, Christian Jelitto, Hans Schneider, Gerold A. Weissmüller, Jörg |
Keywords: | ductility; nanoporous gold | Issue Date: | 12-Jun-2015 | Publisher: | Macmillan Publishers Limited, part of Springer Nature | Source: | NPG Asia Materials 6 (7): e187 (2015) | Abstract (english): | We report on mechanical tests on interpenetrating-phase nanocomposite materials made by vacuum impregnation of nanoscale metal networks with a polymer. The metal component is nanoporous gold made by dealloying, whereas two epoxy resins and polyurethane are explored as the polymer component. The composites are strong and deformable in compression. Although previous observations invariably indicate tensile brittleness for nanoporous gold, composite samples made from cm-sized nanoporous samples enable macroscopic tensile and four-point bending tests that show ductility. This implies that the high strength of individual metal objects such as nanowires can now be incorporated into a strong and ductile material from which macroscopic things can be formed. In fact, a rule-of-mixture-type analysis of the stresses carried by the metal phase suggests quantitative agreement with data reported from separate experiments on small-scale gold nanostructures. |
URI: | http://tubdok.tub.tuhh.de/handle/11420/1704 | DOI: | 10.15480/882.1701 | ISSN: | 1884-4057 | Journal: | NPG Asia materials | Institute: | Keramische Hochleistungswerkstoffe M-9 Werkstoffphysik und -technologie M-22 |
Document Type: | Article | Project: | SFB 986, Teilproject A6 - Herstellung und Charakterisierung hierarchischer, multi-funktionaler Keramik/Metall-Polymer Materialsysteme SFB 986: Teilprojekt B2 - Feste und leichte Hybridwerkstoffe auf Basis nanoporöser Metalle |
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