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

Abstract

Liquid metal dealloying (LMD) is a new technology to create porous materials. From a (FeCr) x-Ni 1-x precursor, it is possible to get a bicontinuous structure of FeCr and Mg: a metal-metal composite. An etching step removes the Mg solidstate 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.

Temperature-dependent magnetism in Fe foams via spin-lattice dynamics

“…This study focus on a model foam, but alternative bicontinuous foams could be considered in the future [38], including magnetic foams where the pores are replaced by non-magnetic material, similar to CuMo foams [39], or when two magnetic materials are used, as in FeCr foams [40,41].…”

Machine-learning for designing nanoarchitectured materials by dealloying

“…To establish ML methods to address the above classification problems, training and testing datasets were collected from a total of 21 different peer-reviewed papers, including 13 discussing the LMD method 8,10,11,14,19,[51][52][53][54][55][56][57][58][59][60][61][62][63] , 4 papers addressing the SSID method 17,20,64,65 , and 4 papers examining the aqueous solution dealloying (ASD) method [66][67][68][69] , listed in Supplementary Table 3. These data were then used to classify miscible/immiscible pairs.…”

Hierarchical Design in Nanoporous Metals

“…Dealloying, namely selective dissolution of one or more active components from a solid alloy/compound (consisting of both active and inactive components to create a porous residue) has been explored as a versatile way to prepare porous metals with variable compositions and sizes. [67][68][69][70][71][72] Based on the corrosion conditions, dealloying can be divided into chemical dealloying (in acid/base solutions) and electrochemical dealloying (in electrochemical systems). With increased understanding of the pore formation mechanism by the growth of nanotechnology and nanoscience at the beginning of 21st century, some dealloying methods have been developed for preparing hierarchically porous structures of Au, Pd, Cu, PtAu, PtCu, PtFe, etc.…”