3D morphological evolution of porous titanium by x-ray micro- and nano-tomography

Chen-Wiegart, Yu Chen Karen; Wada, Takeshi; Butakov, Nikita A.; Xiao, Xianghui; Carlo, Francesco De; Kato, Hidemi; Wang, Jun; Dunand, David C.; Maire, Éric

doi:10.1557/jmr.2013.151

Cited by 41 publications

(29 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…While the ISD obtained for ρ = 50% are symmetric with respect to κ 2 = −κ 1 line, it is no longer the case for lower volume fractions that contain less saddle-shape interfaces and more interfaces with κ 1 and κ 2 of the same sign (i.e., locally convex shape). This is also consistent with the results obtained in experiments [27,43] and in phase-field simulations for bulkdiffusion coarsening [30][31][32].…”

Section: B Morphological Evolutionsupporting

confidence: 92%

“…In addition, it was suggested that structures manufactured from dealloying can present significantly different topologies than the ones obtained from spinodal decomposition [53]. To account for these effects, a natural extension of this work will consist of taking more realistic initial microstructures, obtained either from numerical models [1,16,28] or from tomographic observations of dealloyed samples [26,27,43,51]. Another limitation of the present study is the weak surface energy anisotropy considered in Sec.…”

Section: Discussionmentioning

confidence: 99%

“…where D is a dimensionless coefficient that depends slightly on the volume fraction and is reported in Table I. Thus knowing the mobility coefficient M for a given material would enable to predict the coarsening rate of the structure; or reciprocally, measurements obtained from experimental observations [43] could allow to extract a quantitative estimate of the mobility M.…”

Section: B Morphological Evolutionmentioning

confidence: 99%

See 2 more Smart Citations

Phase-field investigation of the coarsening of porous structures by surface diffusion

Geslin

Buchet

Wada

et al. 2019

Phys. Rev. Materials

Self Cite

View full text Add to dashboard Cite

Nano and microporous connected structures have attracted increasing attention in the past decades due to their high surface area, presenting interesting properties for a number of applications. These structures generally coarsen by surface diffusion, leading to an enlargement of the structure characteristic length scale. We propose to study this coarsening behavior using a phase-field model for surface diffusion. In addition to reproducing the expected scaling law, our simulations enable to investigate precisely the evolution of the topological and morphological characteristics along the coarsening process. In particular, we show that after a transient regime, the coarsening is self-similar as exhibited by the evolution of both morphological and topological features. In addition, the influence of surface anisotropy is discussed and comparisons with experimental tomographic observations are presented.

show abstract

Section: B Morphological Evolutionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Section: B Morphological Evolutionmentioning

confidence: 99%

See 1 more Smart Citation

Phase-field investigation of the coarsening of porous structures by surface diffusion

Geslin

Buchet

Wada

et al. 2019

Phys. Rev. Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…This structure continues to corrode and forms a bicontinuous 3D network of pores by 33 min [Fig. 3(c)], analogous to the dealloying process which forms nanoand meso-porous structures for functional applications (Erlebacher et al, 2001;Zhao et al, 2017Zhao et al, , 2019Chen-Wiegart et al, 2013). The corrosion process slows in 33-185 min [Figs.…”

Section: D Nano-tomography Under a Liquid Molten Salt Extreme Enviromentioning

confidence: 99%

Versatile compact heater design forin situnano-tomography by transmission X-ray microscopy

et al. 2020

Self Cite

View full text Add to dashboard Cite

A versatile, compact heater designed at National Synchrotron Light Source-II for in situ X-ray nano-imaging in a full-field transmission X-ray microscope is presented. Heater design for nano-imaging is challenging, combining tight spatial constraints with stringent design requirements for the temperature range and stability. Finite-element modeling and analytical calculations were used to determine the heater design parameters. Performance tests demonstrated reliable and stable performance, including maintaining the exterior casing close to room temperature while the heater is operating at above 1100°C, a homogenous heating zone and small temperature fluctuations. Two scientific experiments are presented to demonstrate the heater capabilities: (i) in situ 3D nano-tomography including a study of metal dealloying in a liquid molten salt extreme environment, and (ii) a study of pore formation in icosahedral quasicrystals. The progression of structural changes in both studies were clearly resolved in 3D, showing that the new heater enables powerful capabilities to directly visualize and quantify 3D morphological evolution of materials under real conditions by X-ray nano-imaging at elevated temperature during synthesis, fabrication and operation processes. This heater design concept can be applied to other applications where a precise, compact heater design is required.

show abstract

“…21 For example, an Nb-Ni alloy was immersed in molten Mg where Ni atoms were dealloyed (i.e., dissolved in Mg), and removal of the Mg-Ni phase by immersing the composite in nitric acid leads to a porous Nb structure. 22 Porous Ti, 23 Fe, and Fe-Cr 24 have also been produced by a similar method.…”

Section: Introductionmentioning

confidence: 99%

Template-based fabrication of nanoporous metals

Rebbecchi

Chen

2017

J. Mater. Res.

View full text Add to dashboard Cite

Nanoporous metallic foams with high surface area and novel functional behavior are positioned to stimulate new multifunctional and metamaterial applications. However, there are fundamental challenges in achieving uniform nanopores and tailorable morphology. Emerging templating methods offer a wide range of applicable metallic species while enhancing control of pore morphology, uniformity, and interconnectivity. Here, a critical review of nanoporous metal fabrication is presented, with focus on templating methods utilizing nanoporous polymeric templates. Metals are introduced into percolative nanochannels of sacrificial templates by deposition, and subsequent removal of templates yields ordered nanoporous metals. We introduce approaches for preparing nanoporous templates, including utilizing block copolymer self-assembly that yields periodic gyroid networks. While metallization of templates by electrodeposition has been demonstrated, electroless deposition permits uniform deposition by many metallic species and infiltration of narrow pores. Examples of nanoporous metals with uniform pore sizes below 50 nm fabricated by templating methods are examined.

show abstract

3D morphological evolution of porous titanium by x-ray micro- and nano-tomography

Abstract: Abstract

Cited by 41 publications

References 39 publications

Phase-field investigation of the coarsening of porous structures by surface diffusion

Phase-field investigation of the coarsening of porous structures by surface diffusion

Versatile compact heater design forin situnano-tomography by transmission X-ray microscopy

Template-based fabrication of nanoporous metals

Contact Info

Product

Resources

About