Geometric characterization of additively manufactured polymer derived ceramics

Hundley, Jacob M.; Eckel, Zak C.; Schueller, Emily C.; Cante, Kenneth; Biesboer, Scott; Yahata, Brennan D.; Schaedler, Tobias A.

doi:10.1016/j.addma.2017.08.009

Cited by 40 publications

(32 citation statements)

References 9 publications

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“…It is based on X-ray attenuation and 3D reconstruction of the internal structure from sequential 2D projection images, with a typical resolution of few microns. Particular interest has been recently shown for the application of XCT in the field of AM, to evaluate AM methods, to control the geometry of the produced components or to characterize their microstructure [33][34][35][36][37]. In the field of ceramic materials, XCT have been particularly used for structural or damage characterization of ceramic matrix composites [38][39][40][41][42][43] and to evaluate pore morphology and interconnectivity of porous or cellular ceramics [44][45][46][47][48][49][50].…”

Section: Introductionmentioning

confidence: 99%

X-ray tomography of additive-manufactured zirconia: Processing defects – Strength relations

Saâdaoui

Khaldoun

Adrien

et al. 2020

Journal of the European Ceramic Society

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Section: Introductionmentioning

confidence: 99%

X-ray tomography of additive-manufactured zirconia: Processing defects – Strength relations

Saâdaoui

Khaldoun

Adrien

et al. 2020

Journal of the European Ceramic Society

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“…The reason for use of BJP was due to the advantages of sample shaping. Unlike other methods, the BJP method does not require a rigid die for sample preparation 32 . Moreover, BJP can produce geometrically complex parts free from residual stresses and with controlled porosity 24 .…”

Section: Methodsmentioning

confidence: 99%

Novel hybrid method to additively manufacture denser graphite structures using Binder Jetting

Popov

Fleisher

Muller‐Kamskii

et al. 2021

Sci Rep

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This study introduces two hybrid processes integrating an additive manufacturing technique with post-processing treatments namely (i) Binder Jetting Printing (BJP) + Cold Isostatic Pressing (CIP) + cycle and (ii) BJP + cycle where cycle refers to a sequence of Impregnation—Drying—Pyrolysis. These two new processes yielded additively manufactured parts with higher density and reduced defects/porosities. As a testbed, we used these new processes to fabricate graphite structures. The samples produced by both methods were compared with each other and benchmarked to the samples produced by (a) BJP alone and (b) Traditional uniaxial pressing like compaction moulding. Various characterisation methods were used to investigate the microstructure and mechanical properties which showed that the porosity of hybrid manufactured samples reduces from 55% to a record 7%. This technological pathway is expected to create a new avalanche of industrial applications that are hitherto unexplored in the arena of hybrid additive manufacturing with BJP method.

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“…The combination of the polymer-derived ceramic (PDC) technique and 3D printing technology is proposed as a way to address the above challenges. The PDC technique employs liquid preceramic polymers (PCPs) without the need for adding ceramic particles to the solution, making possible the decomposition of organic contents and their conversion into ceramic materials via pyrolysis Hundley et al 2017;Fu, Zhu, and Zhu 2019). The advantages of the PDC technique lie in the control of composition and microstructure through design at the molecular level.…”

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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Geometric characterization of additively manufactured polymer derived ceramics

Cited by 40 publications

References 9 publications

X-ray tomography of additive-manufactured zirconia: Processing defects – Strength relations

X-ray tomography of additive-manufactured zirconia: Processing defects – Strength relations

Novel hybrid method to additively manufacture denser graphite structures using Binder Jetting

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

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