Development of a numerical simulation model for predicting the curing of ceramic systems in the stereolithography process

Tarabeux, Justine; Pateloup, Vincent; Michaud, Philippe; Chartier, Thierry

doi:10.1016/j.jeurceramsoc.2018.03.052

Cited by 49 publications

(36 citation statements)

References 10 publications

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“…It appears that the printing process generates an intrinsic area between the layers where the UV polymerization (or the layer transition) implies a nonuniform particle distribution or the presence of cracks after the debinding. The simulation of the UV laser exposure in [29] indicates a non-ideal interlayer exposure, which seems to justify this hypothesis. Moreover, the -bottom-up‖ stereolithography mode uses a laser that crosses a transparent window and consolidates the resin, which can have a degree of adhesion with the transparent window and poor adhesion with the previously printed layer.…”

Section: Microstructure Of the Printed And Sintered Specimen Origin mentioning

confidence: 77%

“…Therefore, the pre-exponential factor could have a porous dependence to predict the attenuation of the anisotropy. Equations (25) and (26) were rearranged in Equations (28) and (29) to model the porous evolution of the pre-exponential factor. The activation energy was fixed to the value of 290 kJ.mol -1 indicated by both previous equations (Figure 7).…”

Section: Temperature ( C)mentioning

confidence: 99%

“…The activation energy was fixed to the value of 290 kJ.mol -1 indicated by both previous equations (Figure 7). The pre-exponential factors and obtained using (28) and (29) are presented in…”

Section: Temperature ( C)mentioning

confidence: 99%

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Modeling sintering anisotropy in ceramic stereolithography of silica

et al. 2020

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Section: Microstructure Of the Printed And Sintered Specimen Origin mentioning

confidence: 77%

Section: Temperature ( C)mentioning

confidence: 99%

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Modeling sintering anisotropy in ceramic stereolithography of silica

et al. 2020

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“…From the observation of the as‐printed specimen in FigureA, no indication of interfaces between adjacent layers the cross section was presented, indicating sufficient curing of ceramic suspension with the preset parameters. According to the UV‐laser beam scattering phenomenon, the cured depth of suspension with 3Y‐TZP may be seriously reduced due to a high refractive index of submicronic zirconia particles compared to the acrylate monomers. Probability of cracking along the recoating direction tends to increase due to serious bonding between adjacent layers.…”

Section: Resultsmentioning

confidence: 99%

Additive manufactured 3Y‐TZP ceramics: Study of micromechanical behavior by nanoindentation and microscratch method

Nie

et al. 2020

Int J Applied Ceramic Tech

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The mechanical property of advanced ceramics by additive manufacturing through layer-by-layer processing and subsequent sintering has been employed as a key basis for optimizing the processing and developing future application. 3Y-TZP ceramic was fabricated by stereolithography-based additive manufacturing, and the mechanical properties were investigated by nanoindentation and microscratch testing. The microscopic mechanism and evolution of surface deformation and damage induced by scratching were revealed by scanning electron microscopy and surface interferometer. Results showed that the nanoindentation hardness and elastic modulus were comparable to those of conventional process. With the increase in the applied normal load, the scratch-induced damage followed three sequential stages, that is, plastic plowing, microcracking and surface spalling. The magnitude of the microcracks nucleated during scratching depended on the applied normal load. Concerning the homogeneity and integrity with the sintered parts without delaminated cracks and pores, the evolution of surface damage was discussed in different stages. It was concluded that the layer-by-layer process did not affect the characteristic of microcracking evolution. K E Y W O R D S3Y-TZP, additive manufacturing, micro-scratch test, nanoindentation, stereolithography

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“…There are multiple attempts in the scientific community to study the fundamental aspects of the described problems and to optimize the manufacturing approaches targeting for defect-free technical ceramics. Among those, a series of experimentation [ 14 , 15 , 16 , 17 , 18 ] and advanced numerical modeling [ 19 , 20 , 21 , 22 ]. The development of numerical models for simulation of ceramic-related physical processes is closely related to the material’s microstructure.…”

Section: Introductionmentioning

confidence: 99%

Evolution of SLA-Based Al2O3 Microstructure During Additive Manufacturing Process

2020

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Evolution of additively manufactured (AM) ceramics’ microstructure between manufacturing stages is a hardly explored topic. These data are of high demand for advanced numerical modeling. In this work, 3D microstructural models of Al2O3 greenbody, brownbody and sintered material are presented and analyzed, for ceramic samples manufactured with SLA-based AM workflow, using a commercially available ceramic paste and 3D printer. The novel data, acquired at the micro- and mesoscale, using Computed Tomography (CT), Scanning Electron Microscopy (SEM) and Focused Ion-Beam SEM (FIB/SEM) techniques, allowed a deep insight into additive ceramics characteristics. We demonstrated the spatial 3D distribution of ceramic particles, an organic binder and pores at every stage of AM workflow. The porosity of greenbody samples (1.6%), brownbody samples (37.3%) and sintered material (4.9%) are analyzed. Pore distribution and possible originating mechanisms are discussed. The location and shape of pores and ceramic particles are indicative of specific physical processes driving the ceramics manufacturing. We will use the presented microstructural 3D models as input and verification data for advanced numerical simulations developed in the project.

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Development of a numerical simulation model for predicting the curing of ceramic systems in the stereolithography process

Cited by 49 publications

References 10 publications

Modeling sintering anisotropy in ceramic stereolithography of silica

Modeling sintering anisotropy in ceramic stereolithography of silica

Additive manufactured 3Y‐TZP ceramics: Study of micromechanical behavior by nanoindentation and microscratch method

Evolution of SLA-Based Al2O3 Microstructure During Additive Manufacturing Process

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