Exploring the mechanical properties of additively manufactured carbon-rich zirconia 3D microarchitectures

Winczewski, J.P.; Zeiler, Steven R.; Gabel, Stefan; Susarrey-Arce, Arturo; Gardeniers, Han; Merle, Benoit

doi:10.1016/j.matdes.2023.112142

Cited by 10 publications

(7 citation statements)

References 82 publications

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“…[ 72,73 ] Although BZO, CZO, and SZO reveal optically the presence of oxygen deficiencies, the optical response is attributed to local inhomogeneities in our alkaline‐perovskite microarchitectures, we can expect that longer annealing times to reduce background emissions from defects for the production of refractive index ceramics in micro‐optics. [ 8,28 ] Our group has observed similar findings for low‐temperature annealing (≈600 °C) of denser ZrO 2 ceramics, [ 24 ] which could have caused the buried of carbon or non‐stochiometric components, [ 42 ] as could be the case for non‐stoichiometric BZO, CZO, and SZO species.…”

Section: Resultsmentioning

confidence: 68%

“…Our group has observed similar findings for lowtemperature annealing (≈600 °C) of ZrO 2 , leading to buried carbon, which paradoxically increases the intrinsic mechanical properties of ZrO 2 . [42] A way forward is to compensate for composition inhomogeneities; an excess amount of A-rich components, such as an excess of Sr, Ba, or Ca, is sometimes used to compensate for carbonate formation. [38,43] To our knowledge, the AM of 3D perovskite architectures with sub-micrometer sizes has not yet been presented.…”

Section: Introductionmentioning

confidence: 99%

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3D‐Architected Alkaline‐Earth Perovskites

Winczewski,

Arriaga Dávila,

Herrera‐Zaldívar

et al. 2024

Advanced Materials

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Three‐dimensional (3D) ceramic architectures are captivating geometrical features with an immense demand in photonics. Here, we develop an additive manufacturing (AM) approach for printing alkaline‐earth perovskite 3D microarchitectures. The newly developed approach enables custom‐made photoresists suited for two‐photon lithography, permitting the production of alkaline‐earth perovskite (BaZrO3, CaZrO3, and SrZrO3) 3D structures shaped in the form of octet‐truss lattices, gyroids or inspired architectures like sodalite zeolite, and C60 buckyball with micrometric and nanometric feature sizes. Alkaline‐earth perovskite morphological, structural, and chemical characteristics are studied. The optical properties of such perovskite architectures are investigated using cathodoluminescence and wide‐field photoluminescence emission to estimate the lifetime rate and defects in BaZrO3, CaZrO3, and SrZrO3. From a broad perspective, our AM methodology facilitates the production of 3D‐structured mixed oxides. Our findings are the first steps toward dimensionally‐refined high refractive index ceramics for micro‐optics and other terrains like (photo)catalysis.This article is protected by copyright. All rights reserved

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Section: Resultsmentioning

confidence: 68%

Section: Introductionmentioning

confidence: 99%

3D‐Architected Alkaline‐Earth Perovskites

Winczewski,

Arriaga Dávila,

Herrera‐Zaldívar

et al. 2024

Advanced Materials

Self Cite

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“…The manufactured microarchitectures have been produced using metal-organic acrylates that stabilize the t-ZrO 2 at low temperatures rather than the m-ZrO 2 phase, increasing mechanical resilience. [34] Such rich environments encourage understanding the multiple defects optically, [59] discussed in other sections later.…”

Section: Determination Of the Crystallographic Phasesmentioning

confidence: 97%

“…[32] Similarly, in ceramic composites, toughening can be achieved by homogenizing the particle size and lattice strains at phase boundaries, demonstrating the role of defects in enhancing mechanical resilience. [33,34] Exploring the influence of Zn doping in ZrO 2 (ZrO 2 :Zn) is a promising path to understanding phase stabilization mechanisms and emergent defects in AM ZrO 2 microarchitectures. Furthermore, it proposes the use of earth-abundant materials like Zn.…”

Section: Introductionmentioning

confidence: 99%

Additive Manufacturing of Zn‐Doped ZrO₂Architectures

Winczewski,

Arriaga‐Dávila,

Maestre

et al. 2024

Adv Eng Mater

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Tailoring the properties of microfabricated ceramics through doping can unlock new avenues for the additive manufacturing (AM) of advanced three‐dimensional (3D) architectures. The first step to achieving optical functionality is to control material morphology, crystallinity, and defects associated with the composition of the produced AM architecture and dopants. For this purpose, AM of zinc‐doped zirconia (ZrO2:Zn) 3D microarchitectures are proposed using two‐photon lithography and tailor‐made resin. It is found that Zn doping modulates ZrO2:Zn architecture crystallinity and optical properties. The modification of optical properties through Zn doping is confirmed by micro‐photoluminescence, where higher energy photon emission is observed due to the promotion of oxygen vacancies and surface defects. It is also shown that Zn 2.5% and 5 wt.% stabilizes the monoclinic ZrO2 at a lower temperature than in the case of undoped ZrO2. Furthermore, we have evidence that Zn tends to form ZnO wurtzite, which is later sublimated. Our findings provide a promising route to understand the role of defects ZrO2:Zn optically upon annealing.This article is protected by copyright. All rights reserved.

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“…The design of these electrodes must be based on findings from fundamental studies. Here, emerging technologies such as 3-D printing [217][218][219][220] and electrospinning [221,222] could play a pivotal role in producing electrodes with multiscale porosities and highly ordered structures.…”

Section: Discussionmentioning

confidence: 99%

Bubbles and membranes : electrolysis at the mesoscale

Raman

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The presence of bubbles in gas-evolving electrolytic processes can heavily alter the mass transport of gaseous products and can induce severe overpotential penalties at the electrode through the action of bubble coverage (hyperpolarization) and electrolyte constriction (Ohmic shielding). However, bubble formation can also alleviate the overpotential by lowering the concentration of dissolved gas in the vicinity of the electrode. In this study, we investigate the latter by considering the growth of successive hydrogen bubbles driven by a constant current in alkaline-water electrolysis and their impact on the half-cell potential in the absence of hyperpolarization. The bubbles nucleate on a hydrophobic cavity surrounded by a ring microelectrode which remains free of bubble coverage. The dynamics of bubble growth does not adhere to one particular scaling law in time, but undergoes a smooth transition from pressure-driven towards supply-limited growth. The contributions of the different bubble-induced phenomena leading to the rich behaviour of the periodic fluctuations of the overpotential are identified throughout the different stages of the bubble lifetime, and the influence of bubble size and applied current on the concentration and Ohmic overpotential components is quantified. We find that the efficiency of gas absorption, and hence the concentration-lowering effect, increases with increasing bubble size and also with increasing current. However, the concentration-lowering effect is always eventually countered and overcome by the effect of Ohmic shielding as the bubble size outgrows and eclipses the electrode ring beneath.

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Exploring the mechanical properties of additively manufactured carbon-rich zirconia 3D microarchitectures

Cited by 10 publications

References 82 publications

3D‐Architected Alkaline‐Earth Perovskites

3D‐Architected Alkaline‐Earth Perovskites

Additive Manufacturing of Zn‐Doped ZrO₂Architectures

Bubbles and membranes : electrolysis at the mesoscale

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Exploring the mechanical properties of additively manufactured carbon-rich zirconia 3D microarchitectures

Cited by 10 publications

References 82 publications

3D‐Architected Alkaline‐Earth Perovskites

3D‐Architected Alkaline‐Earth Perovskites

Additive Manufacturing of Zn‐Doped ZrO2Architectures

Bubbles and membranes : electrolysis at the mesoscale

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Product

Resources

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Additive Manufacturing of Zn‐Doped ZrO₂Architectures