Conformable green bodies: Plastic forming of robocasted advanced ceramics

Elizarova, Iuliia S.; Vandeperre, Luc; Saiz, Eduardo

doi:10.1016/j.jeurceramsoc.2019.10.010

Cited by 15 publications

(7 citation statements)

References 15 publications

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“…In FS40 and FS50 having narrow and unimodal distributions, the decrease in particle size has led to low interparticle spaces and close packings, which has made the particle interactions severe, preventing the paste from flowing. Consequently, the higher interactions increase the viscosity and the yielding point, meaning that the paste needs higher extrusion forces 3,12,23 . The yield stress of FS50 was calculated at 117.67 Pa, which is considerably higher than FS40, FS32, and FS27 pastes with values of 43.31, 16.95, and 13.15 Pa, respectively.…”

Section: Resultsmentioning

confidence: 97%

“…F I G U R E 3 Fused silica samples printed from pastes varying in particle size distribution Consequently, the higher interactions increase the viscosity and the yielding point, meaning that the paste needs higher extrusion forces. 3,12,23 The yield stress of FS50 was calculated at 117.67 Pa, which is considerably higher than FS40, FS32, and FS27 pastes with values of 43.31, 16.95, and 13.15 Pa, respectively. Thus, even though FS40 and FS50 exhibit shear thinning behavior at higher viscosities, the quality of the printed samples is enhanced, as observed in Figure 3.…”

Section: Flow Behavior Of the Pastesmentioning

confidence: 91%

“…In addition, direct ink writing remarkably fulfills the fabrication of porous and net-shape structures, in which the pore shapes and sizes can be readily altered to enhance materials' characteristics. [3][4][5][6] Clearly, for a successful 3D printing process, the ink must meet specific criteria. First, the homogenous preparation of the ink provides a continuous flow through the nozzle.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, direct ink writing pastes (ink) can be polymeric solutions or slurries containing ceramic or metallic particles. In addition, direct ink writing remarkably fulfills the fabrication of porous and net‐shape structures, in which the pore shapes and sizes can be readily altered to enhance materials’ characteristics 3–6 …”

Section: Introductionmentioning

confidence: 99%

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The influence of particle size distribution on rheological properties of fused silica pastes for direct ink writing

Khecho

Ghaffari

Yekta

2022

Int J Applied Ceramic Tech

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Additive manufacturing of ceramics through the direct ink writing method becomes possible when the effective parameters on rheology are optimized accurately. Successful manufacturing first requires the easy flowing of the ink through the nozzle and then a suitable viscoelastic response for the shape retention of the 3D printed structure. In the present study, fused silica pastes with different particle size distributions varying from D90 of 5–50 µm were prepared for direct ink writing of porous structures. The rheological properties of the pastes, including flow behavior and the viscoelastic moduli variations, were investigated to study the influence of particle size and its distribution on fabricating complex structures. Through investigations, it was found that the narrower size distributions were more appropriate for direct ink writing of fused silica pastes. As the distribution became narrow, the shear thinning behavior was intensified, and the pastes showed high elasticity. The sintering procedure was performed using microwave radiation to suggest a fast process for manufacturing fused silica complex parts containing partially crystallized cristobalite phase and providing porosity of about 10% and a relative density of 90%.

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Section: Resultsmentioning

confidence: 97%

Section: Flow Behavior Of the Pastesmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The influence of particle size distribution on rheological properties of fused silica pastes for direct ink writing

Khecho

Ghaffari

Yekta

2022

Int J Applied Ceramic Tech

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“…Among these techniques, the most important are Stereolithography (SLA) [5][6][7], Material Extrusion (e.g. Fused Deposition Modeling) [8][9][10], Robocasting/Direct Ink Writing (DIW) [11][12][13]) and Binder Jetting (BJ) [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Tailoring α-alumina powder morphology through spray drying for cold consolidation by binder jetting

et al. 2022

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3D Printing of Ceramics with Controllable Green‐Body Configuration Assisted by the Polyvinyl Alcohol‐Based Physical Gels

Chen,

Lo,

Feng

et al. 2023

Adv Eng Mater

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Additive manufacturing of ceramics has received intense attention. In particular, 3D‐printed ceramics with customized shapes are highly desirable in the chemical industry, aerospace, and biomedical engineering. Nevertheless, developing a simple and cost‐effective process that shapes dense ceramics to complex geometries remains challenging because of the high hardness and low ductility of ceramic materials. Extrusion‐based printing, such as direct ink writing (DIW), often requires supporting materials that pose additional difficulties during printing. Herein, we have developed a simple approach to produce stretchable ceramic green bodies of zirconia and alumina for DIW. The ink composes of polyvinyl alcohol (PVA) and an aqueous suspension of ceramic powders. Besides the colloidal network formed by the ceramic particles, PVA plays an important role in tuning the printability of the aqueous ink. Through a freeze‐thaw process, PVA crystallizes to form physical networks. This strategy provides highly stretchable hydrogel green bodies that can be reprogrammed to complex geometries difficult for common DIW printing. The subsequent drying, debinding, and sintering processes produce ceramics with dense structures and fine mechanical properties. In short, our work demonstrates an efficient method for the DIW of ceramic parts that can be reprogrammed to complex geometries.This article is protected by copyright. All rights reserved.

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Conformable green bodies: Plastic forming of robocasted advanced ceramics

Cited by 15 publications

References 15 publications

The influence of particle size distribution on rheological properties of fused silica pastes for direct ink writing

The influence of particle size distribution on rheological properties of fused silica pastes for direct ink writing

Tailoring α-alumina powder morphology through spray drying for cold consolidation by binder jetting

3D Printing of Ceramics with Controllable Green‐Body Configuration Assisted by the Polyvinyl Alcohol‐Based Physical Gels

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