3D printing and in situ transformation of SiCnw/SiC structures

Cao, Junyi; Miao, Kai; Xiong, Shufeng; Su, Fang; Gao, Di; Xiao, Lin; Liu, Zhiyuan; Wang, Pei; Liu, Changyong; Chen, Zhangwei

doi:10.1016/j.addma.2022.103053

Cited by 9 publications

(4 citation statements)

References 31 publications

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“…Since significant research and development must be carried out on molten salts, materials for the receiver, piping, storage, and heat exchangers, and additionally for the many thermochemical cycle components, it is suggested to work on small-scale beam-down concentrators such as those described in the work of Boretti and coworkers, , which may deliver solar heat at temperatures even well above 1000 °C to a ground-based receiver, with power as low as 10 kW. Techniques such as 3D printing with materials such as silicon carbide − can be used in the case to speed up the testing of novel materials under high temperatures and corrosive environments. The future of solar thermochemical cycles for hydrogen production is bright but needs significant research and development.…”

Section: Discussionmentioning

confidence: 99%

The Perspective of Thermochemical Cycles for Concentrated Solar Energy

Boretti,

Castelletto

2023

ACS Appl. Energy Mater.

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The work summarizes the progress of thermochemical cycles to be coupled with a concentrated-solar-power (CSP) technology solar tower with molten salt thermal energy storage. The best perspectives are offered by the sulfur–iodine cycle and the hybrid-sulfur cycle, developed to work at a top temperature of 1000 °C, as permitted in next-generation CSP. The hybrid copper chloride cycle and magnesium chloride cycle are better suited to the current generation of CSP, capped at a top temperature of ∼565 °C. These latter cycles are also suitable for nuclear thermal energy. The research and development needed in all cases is substantial to compensate for the lack of work in recent years.

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Section: Discussionmentioning

confidence: 99%

The Perspective of Thermochemical Cycles for Concentrated Solar Energy

Boretti,

Castelletto

2023

ACS Appl. Energy Mater.

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“…To reduce the oxide ceramic phase residue while maintaining a desired curing thickness, researchers have explored the application of surface coatings on non-oxidized particles. For instance, Cao et al [ 100 ] subjected 10 µm SiC particles to oxidation at 1200 °C for 4 h, resulting in the formation of SiC@SiO 2 core–shell-structured particles with an unchanged particle size. Figure 7 a illustrates the absorbance value of raw SiC and pre-oxidized SiC@SiO 2 ceramic particles.…”

Section: Key Factors Affecting the Light-curing Behavior Of Non-oxide...mentioning

confidence: 99%

“…(a) Absorbance value of raw SiC and pre-oxidized SiC@SiO2 ceramic particles; (b) curing thickness of SiC and SiC@SiO2 ceramic slurries; (c) SEM micrograph of a SiC particle after oxidation;(d-f) EDS analysis of the SiC ceramic particle in (c). Adapted from ref [100]…”

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confidence: 99%

How to Improve the Curing Ability during the Vat Photopolymerization 3D Printing of Non-Oxide Ceramics: A Review

Gao,

Chen,

Chen

et al. 2024

Materials

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Vat photopolymerization (VP), as an additive manufacturing process, has experienced significant growth due to its high manufacturing precision and excellent surface quality. This method enables the fabrication of intricate shapes and structures while mitigating the machining challenges associated with non-oxide ceramics, which are known for their high hardness and brittleness. Consequently, the VP process of non-oxide ceramics has emerged as a focal point in additive manufacturing research areas. However, the absorption, refraction, and reflection of ultraviolet light by non-oxide ceramic particles can impede light penetration, leading to reduced curing thickness and posing challenges to the VP process. To enhance the efficiency and success rate of this process, researchers have explored various aspects, including the parameters of VP equipment, the composition of non-oxide VP slurries, and the surface modification of non-oxide particles. Silicon carbide and silicon nitride are examples of non-oxide ceramic particles that have been successfully employed in VP process. Nonetheless, there remains a lack of systematic induction regarding the curing mechanisms and key influencing factors of the VP process in non-oxide ceramics. This review firstly describes the curing mechanism of the non-oxide ceramic VP process, which contains the chain initiation, chain polymerization, and chain termination processes of the photosensitive resin. After that, the impact of key factors on the curing process, such as the wavelength and power of incident light, particle size, volume fraction of ceramic particles, refractive indices of photosensitive resin and ceramic particles, incident light intensity, critical light intensity, and the reactivity of photosensitive resins, are systematically discussed. Finally, this review discusses future prospects and challenges in the non-oxide ceramic VP process. Its objective is to offer valuable insights and references for further research into non-oxide ceramic VP processes.

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“…To solve this problem, researchers decreased the solid content of SiC inside the slurry and/or increased the particle size of SiC powders [24,25]. However, the sample fabricated with low-solidcontent slurry showed large shrinkage after the remove of polymer agents, which induced defects and thus poor mechanical properties of the sintered samples.…”

Section: Introductionmentioning

confidence: 99%

High strength mullite-bond SiC porous ceramics fabricated by digital light processing

Sun,

Zhang,

Zhang

et al. 2024

Journal of Advanced Ceramics

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Fabricating SiC ceramics via the digital light processing (DLP) technology is of great challenge due to strong light absorption and high refractive index of deep-colored SiC powders, which highly differ from those of resin, and thus significantly affect the curing performance of the photosensitive SiC slurry. In this paper, a thin silicon oxide (SiO 2 ) layer was in-situ formed on the surface of SiC powders by pre-oxidation treatment. This method was proven to effectively improve the curing ability of SiC slurry. The SiC photosensitive slurry was fabricated with solid content of 55 vol% and viscosity of 7.77 Pa•s (shear rate of 30 s −1 ). The curing thickness was 50 μm with exposure time of only 5 s. Then, a well-designed sintering additive was added to completely convert low-strength SiO 2 into mullite reinforcement during sintering. Complexshaped mullite-bond SiC ceramics were successfully fabricated. The flexural strength of SiC ceramics sintered at 1550 ℃ in air reached 97.6 MPa with porosity of 39.2 vol%, as high as those prepared by spark plasma sintering (SPS) techniques.

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3D printing and in situ transformation of SiCnw/SiC structures

Cited by 9 publications

References 31 publications

The Perspective of Thermochemical Cycles for Concentrated Solar Energy

The Perspective of Thermochemical Cycles for Concentrated Solar Energy

How to Improve the Curing Ability during the Vat Photopolymerization 3D Printing of Non-Oxide Ceramics: A Review

High strength mullite-bond SiC porous ceramics fabricated by digital light processing

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