Direct ink writing of three dimensional Ti2AlC porous structures

Elsayed, Hamada; Chmielarz, Anna; Potoczek, Marek; Fey, Tobias; Colombo, Paolo

doi:10.1016/j.addma.2019.05.018

Cited by 22 publications

(25 citation statements)

References 32 publications

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“…The porous Ti 2 AlC lattices were sintered at 1400°C in argon, resulting in total porosities between 44 and 63 vol%, and mechanical strengths ranging between 43 and 83 MPa. 236 Regarding the 3D porous Cr 2 AlC architectures, MAX phase powders were mixed with polyethylenimine as dispersant, hydroxypropyl methylcellulose as thickening agent, and ammonium polyacrylate as flocculant. 126 The resulting ink was extruded by robocasting, followed by a drying process and consolidation by SPS under pressureless conditions.…”

Section: Additive Manufacturingmentioning

confidence: 99%

“…Robocasting and direct ink writing-based on the same principle -have been used to produce complex 3D structures based on Cr 2 AlC ( Figure 9) and Ti 2 AlC, respectively. 126,236 The processing was described above in Section 4.3 (porous architectures).…”

Section: Near Net Shapingmentioning

confidence: 99%

“…This approach can produce bimodal porosity, which is based on millimeter range channels between struts, and micro‐porosity within struts due to incomplete densification. Well‐defined, complex structures have been recently reported for Ti 2 AlC and Cr 2 AlC, 126,236 . As with the replica method and direct foaming, control of rheological properties is crucial.…”

Section: Structuresmentioning

confidence: 99%

“…Ti 2 AlC inks were developed using commercial powders and polyethylene glycol or polyvinyl alcohol as organic binders in water and extruded by direct ink writing. The porous Ti 2 AlC lattices were sintered at 1400°C in argon, resulting in total porosities between 44 and 63 vol%, and mechanical strengths ranging between 43 and 83 MPa 236 . Regarding the 3D porous Cr 2 AlC architectures, MAX phase powders were mixed with polyethylenimine as dispersant, hydroxypropyl methylcellulose as thickening agent, and ammonium polyacrylate as flocculant 126 .…”

Section: Structuresmentioning

confidence: 99%

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Processing of MAX phases: From synthesis to applications

2020

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MAX phases are well-known and established due to their unique combination of properties and versatility, but this family of materials has experienced several ups and downs during its short history, including even being referred to with different names. Extensive work was carried out in the early 1960s in Vienna (Austria) by Wolfgang Jeitschko and Hans Nowotny, who discovered in more than 100 new carbides and nitrides. 1 Among them, they reported a new class of ternary systems, based on a transition metal (M), a metalloid (Me), and carbon (C), with a similar crystal structure to carbon-stabilized β-manganese phase, that is, Mo 3 Al 2 C. They were classified as "H-Phases" due to their hexagonal crystal structure, and some compositions

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Section: Additive Manufacturingmentioning

confidence: 99%

Section: Near Net Shapingmentioning

confidence: 99%

Section: Structuresmentioning

confidence: 99%

Section: Structuresmentioning

confidence: 99%

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Processing of MAX phases: From synthesis to applications

2020

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“…Second, it can realise the flexible design and manufacture of structural parts with complex shapes, breaking the limitations of the form in traditional ceramic processing technology, and third, it makes personalised designs and structures feasible, to meet the needs of different groups. At present, the main techniques for the additive manufacturing of ceramic parts are as follows: vat photopolymerisation, such as stereolithography (SL) (Jacobs 1992;Chen et al 2010), material jetting, such as inkjet printing (IJP) (Derby 2011;Tan, Tran, and Chua 2016;Saengchairat, Tran, and Chua 2017;Chen, Ouyang, et al 2018), and binder jetting , material extrusion (Tian et al 2017), such as fused deposition manufacturing (FDM) (Danforth 2016;Cano et al 2019) and direct ink writing (DIW) Elsayed et al 2019), powder bed fusion, such as selective laser sintering (SLS) (Yuan, Shen, et al 2019;Chen, Wu, et al 2018) and selective laser melting (SLM) (Minasyan et al 2018;Chen, Li, Wu, et al 2019;Yu et al 2019), and binder jetting, such as three dimensional printing Huang et al 2019). Digital-light-processing (DLP) (Felzmann et al 2012;Mei et al 2019), as a derivative technology of stereolithography, is capable of curing a whole layer in one time period without the need for a laser light source, yet maintaining the high accuracy and surface quality of SL, which can greatly advance printing efficiency and reduce production costs at the same time.…”

Section: Introductionmentioning

confidence: 99%

Additive manufacturing of lightweight and high-strength polymer-derived SiOC ceramics

Chen

Liu

et al. 2020

Virtual and Physical Prototyping

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Lightweight and high-strength polymer-derived SiOC ceramics with varied lattice structures have been successfully produced using different polysiloxanes as preceramic polymers (PCPs) via photopolymerisation-based digital-light-processing 3D printing and pyrolysis. Photocurable precursor resins were prepared by simple mixing of polysiloxanes with photosensitive acrylate monomers, achieving good flowability and preserving desirable stability under different heating and oscillation conditions. Complex micron-sized structures were manufactured with high precision via the optimisation of polymer formula and printing parameters. The printed PCPs pyrolysed at 600-1000°C preserved fine features with uniform shrinkage. The skeletons were almost fully dense, with smooth and flawless surfaces at macro/micro scale. Porosities and mechanical properties, including apparent compressive strength, elastic modulus, and indentation hardness, were characterised. XRD, FT-IR, Raman spectroscopy, and XPS were used to explore the chemical variations in elements and atomic bonds. High specific compressive strength to density ratios was obtained for the SiOC lattices compared with other porous ceramics.

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Direct Ink Writing: A 3D Printing Technology for Diverse Materials

et al. 2022

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Additive manufacturing (AM) has gained significant attention due to its ability to drive technological development as a sustainable, flexible, and customizable manufacturing scheme. Among the various AM techniques, direct ink writing (DIW) has emerged as the most versatile 3D printing technique for the broadest range of materials. DIW allows printing of practically any material, as long as the precursor ink can be engineered to demonstrate appropriate rheological behavior. This technique acts as a unique pathway to introduce design freedom, multifunctionality, and stability simultaneously into its printed structures. Here, a comprehensive review of DIW of complex 3D structures from various materials, including polymers, ceramics, glass, cement, graphene, metals, and their combinations through multimaterial printing is presented. The review begins with an overview of the fundamentals of ink rheology, followed by an in‐depth discussion of the various methods to tailor the ink for DIW of different classes of materials. Then, the diverse applications of DIW ranging from electronics to food to biomedical industries are discussed. Finally, the current challenges and limitations of this technique are highlighted, followed by its prospects as a guideline toward possible futuristic innovations.

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Direct ink writing of three dimensional Ti2AlC porous structures

Cited by 22 publications

References 32 publications

Processing of MAX phases: From synthesis to applications

Processing of MAX phases: From synthesis to applications

Additive manufacturing of lightweight and high-strength polymer-derived SiOC ceramics

Direct Ink Writing: A 3D Printing Technology for Diverse Materials

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