Processing-microstructure correlations in material extrusion additive manufacturing of carbon fiber reinforced ceramic matrix composites

Best, Jalena; Freudenberg, Wolfgang; Langhof, Nico; Schafföner, Stefan

doi:10.1016/j.addma.2023.103888

Cited by 3 publications

(1 citation statement)

References 44 publications

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“…The latest developments have shown that, in particular, the shaping process can be drastically improved in terms of productivity and reproducibility as well as in freedom of design. Those production processes include thermoset injection molding with Novolak for large-scale production that enables the integration of 6 mm CF short fiber bundles [24,25], additive manufacturing with PEEK [26,27], the pultrusion process of unidirectional reinforced profiles with a fiber volume content of up to 66% [28], and the use of automated fiber placement [29].…”

Section: Introductionmentioning

confidence: 99%

Inductive Heating of Ceramic Matrix Composites (CMC) for High-Temperature Applications

Hackert,

Stiller,

Winhard

et al. 2024

Materials

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The inductive heating of a CMC susceptor for industrial applications can generate very high process temperatures. Thus, the behavior of a silicon carbide-based matrix with carbon-fiber-reinforced carbon (C/C-SiC) as a susceptor is investigated. Specifically, the influence of fiber length and the distribution of carbon fibers in the composite were investigated to find out the best parameters for the most efficient heating. For a multi-factorial set of requirements with a combination of filling levels and fiber lengths, a theoretical correlation of the material structure can be used as part of a digital model. Multi-physical simulation was performed to study the behavior of an alternating magnetic field generated by an inducing coil. The simulation results were verified by practical tests. It is shown that the inductive heating of a C/C-SiC susceptor can reach very high temperatures in a particularly fast and efficient way without oxidizing if it is ensured that a silicon carbide-based matrix completely encloses the fibers.

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Section: Introductionmentioning

confidence: 99%

Inductive Heating of Ceramic Matrix Composites (CMC) for High-Temperature Applications

Hackert,

Stiller,

Winhard

et al. 2024

Materials

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show abstract

Thermo-oxidative crosslinking of carbon fiber reinforced PEEK (Polyetheretherketone) for additive manufactured ceramic matrix composites

Freudenberg,

Wich,

Best

et al. 2024

Advanced Manufacturing: Polymer & Composites Science

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Additive manufacturing of short fiber oxide ceramic matrix composite: Process analysis and material properties

Stiller,

Nestler,

Uhlmann

et al. 2024

Int J Applied Ceramic Tech

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This work investigates the material extrusion‐based additive manufacturing (AM) process chain of a pure alumina‐based oxide ceramic matrix composite, starting from material selection, large‐scale compounding to pellets, the AM process itself, debinding and sintering as well as microstructural and mechanical characterization. The compounded pellets have a volume share of 50% binder (polyvinyl butyral [PVB], polyethylene glycol [PEG], and stearic acid) and 50% alumina (Al2O3, alumina powder, and Nextel 610 alumina fibers) with an aimed fiber volume share of 40% after sintering. The material is compounded on an industrial scale with approximately 10 kg/h and the material extrusion‐based AM process reaches speeds of up to 1000 mm/s. A variation of the feed rate leads to a significant increase in surface roughness and an increase in mass of 30%, in thickness of 12% and in width of 25%. The flexural behavior in the four‐point‐bending test can be described by a fast first peak and reaching higher flexural strength after the first crack subsequent with averages of 23.8 ± 3.6 MPa below .1% elongation. The fracture surfaces show the expected failure mechanisms like pull‐out and crack deflection. The resulting fiber length in the printed samples is 140 µm in average.

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Processing-microstructure correlations in material extrusion additive manufacturing of carbon fiber reinforced ceramic matrix composites

Cited by 3 publications

References 44 publications

Inductive Heating of Ceramic Matrix Composites (CMC) for High-Temperature Applications

Inductive Heating of Ceramic Matrix Composites (CMC) for High-Temperature Applications

Thermo-oxidative crosslinking of carbon fiber reinforced PEEK (Polyetheretherketone) for additive manufactured ceramic matrix composites

Additive manufacturing of short fiber oxide ceramic matrix composite: Process analysis and material properties

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