Fabrication of SiOC ceramic with cellular structure via UV-Assisted direct ink writing

Wei, Lai; Li, Jing; Zhang, Shuai; Li, Bo; Liu, Yu; Wang, Feng; Dong, Shixiang

doi:10.1016/j.ceramint.2019.10.083

Cited by 37 publications

(12 citation statements)

References 28 publications

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“…The extruded laments should be cured quickly and exhibit necessary modulus to prevent collapse of the subsequent printing structure 14 . Generally speaking, the curing behavior of traditional DIW is di cult to control due to its the reliance on solvent volatilization 15 . In this study, NIR assisted curing was used to print multi-scale and large-span structures without support.…”

Section: Resultsmentioning

confidence: 99%

“…The UV-based in-situ photocuring-assisted direct ink writing (DIW) technology retains the advantage of photopolymerization being temporally-spatially controllable, which can improve the ability of DIW to construct complex structures to realize unsupported printing of polymer materials 13 . When curing high solids ceramic slurries by UV or visible light with limited penetration, curing e ciency, size, and throughput are unacceptable 14,15 . The large amount of suspended ceramic particles in the photosensitive slurry introduces additional light scattering, refractive index and extinction coe cient.…”

Section: Introductionmentioning

confidence: 99%

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3D Printing of Unsupported Multi-Scale and Large-Span Ceramic via Near-Infrared Assisted Direct Ink Writing

Zhao¹,

Zhu

He³

et al. 2022

Preprint

Self Cite

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Auxiliary supports are commonly introduced to avoid collapse in three-dimensional (3D) ceramic printing with low-angle structures, which could bring concerns of complex process and unsatisfying material utilization, limiting the improvements of printing efficiency. To overcome this limitation, this paper presents a simple ceramic printing method, which realizes printing of unsupported multi-scale and large-span ceramics through the combination of direct ink writing (DIW) and up-conversion particles-assisted photopolymerization (UCAP) process under near-infrared (NIR) irradiation. This printing technology enables in-situ curing of multi-scale filaments with diameters ranging from 410 µm to 3.50 mm, and successfully constructed ceramic structures of torsion spring, three-dimensional bending and cantilever beam through unsupported printing. This method will bring more innovation space to the high-throughput and unsupported 3D manufacturing of complex shape ceramics.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

3D Printing of Unsupported Multi-Scale and Large-Span Ceramic via Near-Infrared Assisted Direct Ink Writing

Zhao¹,

Zhu

He³

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…[ 14 ] Other studies have shown that direct ink writing coupled with UV‐assisted curing can be used to 3D print light‐sensitive resins. [ 15,16 ] Studies have also added viscosity‐modifying agents to make the resin shear‐thinning. This allows the resin to be printed via direct ink writing such that it can retain its shape after being extruded, before being transferred to an oven for curing.…”

Section: Introductionmentioning

confidence: 99%

Rapid Manufacturing via Selective Radio‐Frequency Heating and Curing of Thermosetting Resins

Sarmah¹,

Desai²,

Tezel

et al. 2022

Adv Eng Mater

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Thermosetting polymers are stable, high-performance materials that are crosslinked by heating and curing at a specified temperature. These materials are mechanically strong and highly resistant to thermal and chemical degradation, such that thermoset composites are a popular choice for applications ranging from battery frameworks to aerospace and automotive frames. [1] Current manufacturing processes for thermosetting epoxy resins include molding and curing of the matrix in a hightemperature oven, which is energy, labor, and time consuming, and sets limits on achievable part geometries and process times. [2,3] Existing methodologies to form epoxy composites include stacking one layer over the other to make 3D parts. [4] The ability to 3D print these multilayered structures would allow for the free-form fabrication of complex geometries, eliminating the additional cost of ovens and specific molds for each part. Additive manufacturing has been extensively used to 3D print thermoplastics [5][6][7] and metals. [8][9][10] A development of such an on-demand, rapid production technique could facilitate a distributed manufacturing economy for high-performance composites. [11] There has been limited research in the field of printing thermosets from a reservoir of resin. Selective curing of photocurable resins on the upper interface of liquid reservoirs using UV light has been reported previously to print 3D structures. [12,13] The materials used to make structures using this method are at least partially made of UV curable resins rather than conventional commercial thermosets. Apart from this, a handful of technologies have been developed for the additive manufacturing of thermosets. Extrusion-based printing of thermosets has been made possible by printing inside a thixotropic support bath, followed by extraction from the bath and curing in an oven. [14] Other studies have shown that direct ink writing coupled with UV-assisted curing can be used to 3D print light-sensitive resins. [15,16] Studies have also added viscosity-modifying agents to make the resin shearthinning. This allows the resin to be printed via direct ink writing such that it can retain its shape after being extruded, before being transferred to an oven for curing. [17][18][19] Additive manufacturing of thermosets via frontal polymerization has been explored to print complex shapes but is restricted by the limited number of resin chemistries that can be printed using this method. [20,21] It is highly desirable to develop an out-of-oven curing methodology that would allow for selective curing and 3D printing of

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“…Since then, numerous preceramic polymers with photocurable functional groups such as vinyl, acrylate, methacrylate, or thiol have been investigated to evaluate their usefulness in producing ceramic components with tailored properties. [26][27][28][29][30][31][32][33][34][35] Thiol-ene-free radical "click reaction" could undergo rapid and controlled polymerization to form a homogeneous network. [36,37] By delaying the onset of gel point, UV lithography processable thiol-ene-based formulations can provide a homogeneous network with well-distributed crosslink density, and are thus lower in their shrinkage stress experienced after post-curing compared to typical acrylate-based photo-resin materials commonly used in AM process.…”

Section: Introductionmentioning

confidence: 99%

High‐Precision 3D Printing of High‐Strength Polymer‐Derived Ceramics: Impact of Precursor's Molecular Structure

Chen

Lim

et al. 2022

Adv Eng Mater

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Additive manufacturing (3D printing) offers new opportunities to create complex structures for many applications. The development of suitable precursors for high‐resolution 3D printing of ceramics is increasingly essential to meet evolving material requirements. Herein, a new hybrid preceramic formulation based on thiol‐ene click chemistry for precision printing of polymer‐derived ceramic has been developed to enable the fabrication of complex 3D objects using high‐resolution projection microstereolithography (PμSL). Two low‐odor thiol compounds with either three (trithiol) or four thiols (tetrathiol) moieties have been examined, to investigate the influence of thiol structure on the mechanical properties of converted ceramics. Pyrolysis of the printed green bodies leads to the formation of silicon oxycarbide (SiOC) with high fidelity after polymer‐to‐ceramic transformation. The SiOC printed specimen converted from the tetrathiol formulation (4T) demonstrates excellent mechanical strength surpassing that of the trithiol‐based formulation (3T) and previously reported SiOC preceramic polymers. The ceramic honeycomb fabricated using the tetrathiol compound shows remarkable improvement in compressive strength, which is two times higher than that of the trithiol‐derived ceramic. This work proposes a simple and effective way to formulate 3D printable preceramic polymers through molecular design. The achieved 3D printed SiOC can fulfill the requirement for high‐strength ceramic materials with complex shapes.

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Fabrication of SiOC ceramic with cellular structure via UV-Assisted direct ink writing

Cited by 37 publications

References 28 publications

3D Printing of Unsupported Multi-Scale and Large-Span Ceramic via Near-Infrared Assisted Direct Ink Writing

3D Printing of Unsupported Multi-Scale and Large-Span Ceramic via Near-Infrared Assisted Direct Ink Writing

Rapid Manufacturing via Selective Radio‐Frequency Heating and Curing of Thermosetting Resins

High‐Precision 3D Printing of High‐Strength Polymer‐Derived Ceramics: Impact of Precursor's Molecular Structure

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