Mechanical Properties of FeCr‐Based Composite Materials Elaborated by Liquid Metal Dealloying towards Bioapplication

Liquid metal dealloying (LMD) is a new technology to create porous materials. From a (FeCr)x‐Ni1–x precursor, it is possible to get a bicontinuous structure of FeCr and Mg: a metal–metal composite. An etching step removes the Mg solid‐state solution phase to give a metal–air composite. The last step...

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Bibliographic Details
Published in:Advanced engineering materials 2020-12, Vol.22 (12), p.n/a
Main Authors: Mokhtari, Morgane, Le Bourlot, Christophe, Duchet-Rumeau, Jannick, Godet, Eugénie, Geslin, Pierre-Antoine, Dancette, Sylvain, Wada, Takeshi, Kato, Hidemi, Maire, Eric
Format: Article
Language:English
Subjects:
composite materials
Condensed Matter
liquid metal dealloying
mechanical properties
Mechanics
Mechanics of materials
metallic foam
nanoindentation
Physics
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Summary:Liquid metal dealloying (LMD) is a new technology to create porous materials. From a (FeCr)x‐Ni1–x precursor, it is possible to get a bicontinuous structure of FeCr and Mg: a metal–metal composite. An etching step removes the Mg solid‐state solution phase to give a metal–air composite. The last step, polymer infiltration, gives metal–polymer composites. Herein, metal–metal, metal–air, and metal–polymer (rubbery or glassy polymers) with three different phase ratios are elaborated by LMD from Ni‐based precursors and their mechanical properties are analyzed. A full polymer infiltration into the pores is obtained and the epoxy polymer properties are not affected by the metallic foam presence. Concerning control of the mechanical properties, the material's second‐phase selection is a key factor. Herein, it is shown that the mechanical properties are easily designed by optimizing phase ratio, ligament size, and second‐phase type and that these materials are promising materials for biomedical applications. FeCr‐based interpenetrating phase metal–metal (pink), metal–air (blue), and metal–glassy polymers (green) composites with different phase ratios and two different epoxy network (rubbery or glassy) are elaborated by liquid metal dealloying from FeCrNi‐based precursors. Resulting mechanical properties are investigated at room temperature and it is shown that these materials are promising materials for biomedical applications.
ISSN:1438-1656
1527-2648
DOI:10.1002/adem.202000381