Corrosion resistance of porous ferritic stainless steel produced by liquid metal dealloying of Incoloy 800

Mokhtari, Morgane; Wada, Takeshi; Bourlot, Christophe Le; Duchet‐Rumeau, Jannick; Kato, Hidemi; Maire, Éric; Mary, Nicolas

doi:10.1016/j.corsci.2020.108468

Cited by 23 publications

(14 citation statements)

References 59 publications

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“…To take this contribution into account, some studies suggest the use of an apparent density instead of the real one. [43][44][45][46] The curve plotted from a previous study [5] on Figure 2 corresponds to Gibson and Ashby's law, where instead of taking the real density of the foam, they took the apparent density which was estimated at 4ρ 3 when the real density is below 50%. [43] Gibson and Ashby's law was not valid for our materials even for low density (cf.…”

Section: Nanoindentation Testsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Porous materials and nanoporous metals in particular have attracted considerable attention for their excellent functional properties including a high catalytic activity, sensing capabilities, and surface-enhanced Raman scattering. This is due to their interconnected structure and high specific surface [1][2][3][4][5][6] or more recently as biomaterials. [7][8][9][10][11] In contrast to conventional chemical or electrochemical dealloying which may only be applied on noble metals, liquid metal dealloying (LMD) is a promising technique for obtaining nanoporous common materials.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2020

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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.

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Section: Nanoindentation Testsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2020

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“…Recently, there have been some successful reports on fabrication of highly reactive non-noble mesoporous metals such as nanoporous aluminum [30]. In its turn, liquid metal dealloying has been used to fabricate a wide range of non-noble porous metals, including steels [31][32][33][34][35][36], titanium and titanium alloys [11,[37][38][39], zirconium [12], tantalum [40], and cobalt-chromium [41], among others, as well as non-metallic porous materials such as silicon [42] and carbon [43,44]. Particularly important is the recent progress in the development of highly reactive mesoporous metals such as nanoporous magnesium [45] as well as multicomponent complex alloys such as nanoporous high-entropy alloys [46] by liquid metal dealloying.…”

Section: Introductionmentioning

confidence: 99%

Surface Functionalization of Biomedical Ti-6Al-7Nb Alloy by Liquid Metal Dealloying

et al. 2020

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Surface functionalization is an effective approach to change the surface properties of a material to achieve a specific goal such as improving the biocompatibility of the material. Here, the surface of the commercial biomedical Ti-6Al-7Nb alloy was functionalized through synthesizing of a porous surface layer by liquid metal dealloying (LMD). During LMD, the Ti-6Al-7Nb alloy is immersed in liquid magnesium (Mg) and both materials react with each other. Particularly, aluminum (Al) is selectively dissolved from the Ti-6Al-7Nb alloy into liquid Mg while titanium (Ti) and niobium (Nb) diffuse along the metal/liquid interface to form a porous structure. We demonstrate that the porous surface layer in the Ti-6Al-7Nb alloy can be successfully tailored by LMD. Furthermore, the concentration of harmful Al in this porous layer is reduced by about 48% (from 5.62 ± 0.11 wt.% to 2.95 ± 0.05 wt.%) after 30 min of dealloying at 1150 K. The properties of the porous layer (e.g., layer thickness) can be tuned by varying the dealloying conditions. In-vitro tests suggest improved bone formation on the functionalized porous surface of the Ti-6Al-7Nb alloy.

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“…Thus, during the LMD process, oxidation is prevented and reactive materials such as Mg [25] can be synthesized. To date, a wide variety of porous materials obtained by LMD have been reported, including silicon (Si) [26], steels [24,[27][28][29][30], graphene (C) [31][32][33][34], chromium (Cr) [27], niobium (Nb) [35,36], titanium (Ti) [37,38], and titanium alloys (TiZr, TiHf, TiNb, TiFe, and TiMo) [23,[38][39][40][41]. Moreover, LMD was successfully applied for the surface functionalization of biomedical Ti-6Al-4V and Ti-6Al-7Nb alloys [42,43], design of low modulus composites such as Fe-Mg [39,44], and synthesis of high-coercivity NdFeB-based permanent magnets [45].…”

Section: Introductionmentioning

confidence: 99%

Nanoporous High-Entropy Alloy by Liquid Metal Dealloying

Okulov

Joo

Kim

et al. 2020

Metals

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High-entropy nanomaterials possessing high accessible surface areas have demonstrated outstanding catalytic performance, beating that found for noble metals. In this communication, we report about the synthesis of a new, nanoporous, high-entropy alloy (HEA) possessing open porosity. The nanoporous, high-entropy Ta19.1Mo20.5Nb22.9V30Ni7.5 alloy (at%) was fabricated from a precursor (TaMoNbV)25Ni75 alloy (at%) by liquid metal dealloying using liquid magnesium (Mg). Directly after dealloying, the bicontinuous nanocomposite consisting of a Mg-rich phase and a phase with a bulk-centered cubic (bcc) structure was formed. The Mg-rich phase was removed with a 3M aqueous solution of nitric acid to obtain the open, porous, high-entropy Ta19.1Mo20.5Nb22.9V30Ni7.5 alloy (at%). The ligament size of this nanoporous HEA is about 69 ± 9 nm, indicating the high surface area in this material.

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Corrosion resistance of porous ferritic stainless steel produced by liquid metal dealloying of Incoloy 800

Cited by 23 publications

References 59 publications

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

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

Surface Functionalization of Biomedical Ti-6Al-7Nb Alloy by Liquid Metal Dealloying

Nanoporous High-Entropy Alloy by Liquid Metal Dealloying

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