Material extrusion additively manufactured alumina monolithic structures to improve the efficiency of plasma-catalytic oxidation of toluene

Li, Ting; González-Gutiérrez, Joamín; Raguž, Ivan; Holzer, Clemens; Li, Man; Cheng, Ping; Kitzmantel, Michael; Shi, Liyi; Huang, Lei

doi:10.1016/j.addma.2020.101700

Cited by 12 publications

(24 citation statements)

References 53 publications

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“…The same binder system was used to obtain sinterable feedstocks with steels [25,26], hard metal [40], cermet [40], zirconia [35] and alumina [64] is used in this study. A thermoplastic elastomer-TPE (Kraiburg TPE GmbH & Co. KG, Waldkraiburg, Germany) and a grafted polyolefin-gPO (BYK-Chemie GmbH, Wesel, Germany) were combined to prepare the binder system in the feedstock for this investigation.…”

Section: Methodsmentioning

confidence: 99%

“…The main disadvantage of using filaments as feedstock is that binder systems must be adjusted to have enough mechanical strength and flexibility so the filament can be reliably processed in standard commercial MEX machines. Nevertheless, new binders are available, and filaments with copper and other sinterable powders have been reported in the literature [15,29,31,32,39,49,[51][52][53][54][55][56][57][58][59][60][61][62][63][64]. Therefore, due to the increasing popularity of filamentbased MEX, this technique was selected for shaping copper specimens in this study.…”

Section: Introductionmentioning

confidence: 99%

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Bending Properties of Lightweight Copper Specimens with Different Infill Patterns Produced by Material Extrusion Additive Manufacturing, Solvent Debinding and Sintering

González-Gutiérrez

Cano

Ecker³

et al. 2021

Applied Sciences

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Material extrusion additive manufacturing (MEX) is a versatile technology for producing complex specimens of polymers, ceramics and metals. Highly-filled filaments composed of a binder system and a high-volume content of sinterable powders are needed to produce ceramic or metal parts. After shaping the parts via MEX, the binder is removed and the specimens are sintered to obtain a dense part of the sintered filler particles. In this article, the applicability of this additive manufacturing process to produce copper specimens is demonstrated. The particular emphasis is on investigating the production of lightweight specimens that retain mechanical properties without increasing their weight. The effect of infill grades and the cover presence on the debinding process and the flexural properties of the sintered parts was studied. It was observed that covers could provide the same flexural strength with a maximum weight reduction of approximately 23%. However, a cover on specimens with less than 100% infill significantly slows down the debinding process. The results demonstrate the applicability of MEX to produce lightweight copper specimens.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bending Properties of Lightweight Copper Specimens with Different Infill Patterns Produced by Material Extrusion Additive Manufacturing, Solvent Debinding and Sintering

González-Gutiérrez

Cano

Ecker³

et al. 2021

Applied Sciences

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“…Beyond industry, several research groups are engaged in the realization of ceramic and metal components applying the huge bundle of different AM methods [ 1 , 4 , 16 , 17 , 18 ]. In case of MEX, the focus was mainly set on alumina, partially extending the application range to microsystems technology [ 19 , 20 , 21 , 22 , 23 , 24 , 25 ]. With respect to ceramic applications, which need enhanced mechanical properties, zirconia components made via MEX should be very promising, but little research can be found in the literature [ 26 , 27 , 28 , 29 ].…”

Section: Introductionmentioning

confidence: 99%

Printing of Zirconia Parts via Fused Filament Fabrication

et al. 2021

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In this work, a process chain for the fabrication of dense zirconia parts will be presented covering the individual steps feedstock compounding, 3D printing via Fused Filament Fabrication (FFF) and thermal postprocessing including debinding and sintering. A special focus was set on the comprehensive rheological characterization of the feedstock systems applying high-pressure capillary and oscillation rheometry. The latter allowed the representation of the flow situation especially in the nozzle of the print head with the occurring low-shear stress. Oscillation rheometry enabled the clarification of the surfactant’s concentration, here stearic acid, or more general, the feedstocks composition influence on the resulting feedstock flow behavior. Finally, dense ceramic parts (best values around 99 % of theory) were realized with structural details smaller than 100 µm.

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“…Li et al dispersed alumina powder in a molten mixture of TPE plastic and polyolefin, extruded them into filaments and then printed a cylindrical alumina-TPE-polyolefin monolith for plasma catalytic oxidation of toluene. [162] The CEFDM method has been used for VOC degradation, [162] gas storage and separation, [163,164] gas sensing, [165] and other catalytic processes. [148] As the FDM technology matures and the catalyst functionalizes the FDM printed monolith, CEFDM will be increasingly utilized to manufacture catalytic components in the near future.…”

Section: Catalyst-embedded Fused Deposition Meltingmentioning

confidence: 99%

Recent Progress and Perspectives of Direct Ink Writing Applications for Mass Transfer Enhancement in Gas‐Phase Adsorption and Catalysis

et al. 2023

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Conventional adsorbents and catalysts shaped by granulation or extrusion have high pressure drop and poor flexibility for chemical, energy, and environmental processes. Direct ink writing (DIW), a kind of 3D printing, has evolved into a crucial technique for manufacturing scalable configurations of adsorbents and catalysts with satisfactory programmable automation, highly optional materials, and reliable construction. Particularly, DIW can generate specific morphologies required for excellent mass transfer kinetics, which is essential in gas-phase adsorption and catalysis. Here, DIW methodologies for mass transfer enhancement in gas-phase adsorption and catalysis, covering the raw materials, fabrication process, auxiliary optimization methods, and practical applications are comprehensively summarized. The prospects and challenges of DIW methodology in realizing good mass transfer kinetics are discussed. Ideal components with a gradient porosity, multi-material structure, and hierarchical morphology are proposed for future investigations.

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Material extrusion additively manufactured alumina monolithic structures to improve the efficiency of plasma-catalytic oxidation of toluene

Cited by 12 publications

References 53 publications

Bending Properties of Lightweight Copper Specimens with Different Infill Patterns Produced by Material Extrusion Additive Manufacturing, Solvent Debinding and Sintering

Bending Properties of Lightweight Copper Specimens with Different Infill Patterns Produced by Material Extrusion Additive Manufacturing, Solvent Debinding and Sintering

Printing of Zirconia Parts via Fused Filament Fabrication

Recent Progress and Perspectives of Direct Ink Writing Applications for Mass Transfer Enhancement in Gas‐Phase Adsorption and Catalysis

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