Fabrication of polymer derived ceramic parts by selective laser curing

Friedel, T.; Travitzky, Nahum; Niebling, Florian; Scheffler, Michael; Greil, Peter

doi:10.1016/j.jeurceramsoc.2004.07.017

Cited by 96 publications

(50 citation statements)

References 13 publications

(15 reference statements)

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“…These results are comparable to those reported for alumina. [98] Friedel et al [101] used a modified SLS method to produce ceramic parts called selective laser curing (SLC). The starting materials (all in powder form) were polymethylsilsesquioxan (PMS), as a preceramic precursor, and SiC as an inert filler.…”

Section: Indirect Slsmentioning

confidence: 99%

Additive Manufacturing of Ceramic‐Based Materials

et al. 2014

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This paper offers a review of present achievements in the field of processing of ceramic-based materials with complex geometry using the main additive manufacturing (AM) technologies. In AM, the geometrical design of a desired ceramic-based component is combined with the materials design. In this way, the fabrication times and the product costs of ceramic-based parts with required properties can be substantially reduced. However, dimensional accuracy and surface finish still remain crucial features in today's AM due to the layer-by-layer formation of the parts. In spite of the fact that significant progress has been made in the development of feedstock materials, the most difficult limitations for AM technologies are the restrictions set by material selection for each AM method and aspects considering the inner architectural design of the manufactured parts. Hence, any future progress in the field of AM should be based on the improvement of the existing technologies or, alternatively, the development of new approaches with an emphasis on parts allowing the near-net formation of ceramic structures, while optimizing the design of new materials and of the part architecture.

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Section: Indirect Slsmentioning

confidence: 99%

Additive Manufacturing of Ceramic‐Based Materials

et al. 2014

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“…Ho et al in 1999 [8] reported on the effects of energy density on morphology and properties of polycarbonate processed by SLS, and Casalino et al in 2005 [9] reported on the properties of sand moulds for casting prepared by SLS. Effects of process parameter settings on the properties of parts manufactured using techniques similar to SLS can be found elsewhere [10][11][12]. However no such studies have been reported for polyamide, processed using the SLS technique.…”

Section: Introductionmentioning

confidence: 99%

Dependence of mechanical properties of polyamide components on build parameters in the SLS process

Caulfield

McHugh

Lohfeld

2007

Journal of Materials Processing Technology

481

322

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Customised properties of parts manufactured using the selective laser sintering process are achievable by variation of build parameters. The energy density, controlled by laser power, distance between scan lines and speed of the laser beam across the powder bed, all have a very strong influence on the density and the mechanical behaviour of the parts. The present paper investigates the influence of the energy density on physical and mechanical properties of parts produced using polyamide. Additionally, the effect of part orientation during the build is examined. Knowledge of the influence of these parameters allows one to establish trendlines which link build settings to resulting part properties, and hence to fabricate customised parts with predetermined properties.

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“…Therefore, they can be subjected to a large variety of different forming methods, some of them unique or at least much more easily exploitable for polymers than ceramic powders or pastes. These include casting (Melcher et al 2003), infiltration (Satoa et al 1999), pressing (Galusek et al 2007), injection moulding (Walter et al 1996), extrusion (Eom & Kim 2007;Eom et al 2008), machining (Rocha et al 2005), fibre drawing (Okamura et al 2006), blowing/ foaming (Colombo 2008), ink jetting (Mott & Evans 2001), rapid prototyping (Friedel et al 2005), electrohydrodynamic spraying/spinning ), aerosol spraying (Bahloul-Hourlier et al 2001, self-assembly (Malenfant et al 2007) and microcomponent processing such as UV/X-ray lithography, nano/micro-casting, replication, micro-extrusion and embossing/forging (Schulz 2009). …”

Section: Introductionmentioning

confidence: 99%

Ceramic microparticles and capsules via microfluidic processing of a preceramic polymer

Chen

Colombo

et al. 2010

J. R. Soc. Interface.

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We have developed a robust technique to fabricate monodispersed solid and porous ceramic particles and capsules from single and double emulsion drops composed of silsesquioxane preceramic polymer. A microcapillary microfluidic device was used to generate the monodispersed drops. In this device, two round capillaries are aligned facing each other inside a square capillary. Three fluids are needed to generate the double emulsions. The inner fluid, which flows through the input capillary, and the middle fluid, which flows through the void space between the square and inner fluid capillaries, form a coaxial co-flow in a direction that is opposite to the flow of the outer fluid. As the three fluids are forced through the exit capillary, the inner and middle fluids break into monodispersed double emulsion drops in a single-step process, at rates of up to 2000 drops s 21. Once the drops are generated, the silsesquioxane is cross-linked in solution and the cross-linked particles are dried and pyrolysed in an inert atmosphere to form oxycarbide glass particles. Particles with diameters ranging from 30 to 180 mm, shell thicknesses ranging from 10 to 50 mm and shell pore diameters ranging from 1 to 10 mm were easily prepared by changing fluid flow rates, device dimensions and fluid composition. The produced particles and capsules can be used in their polymeric state or pyrolysed to ceramic. This technique can be extended to other preceramic polymers and can be used to generate unique core -shell multimaterial particles.

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Fabrication of polymer derived ceramic parts by selective laser curing

Cited by 96 publications

References 13 publications

Additive Manufacturing of Ceramic‐Based Materials

Additive Manufacturing of Ceramic‐Based Materials

Dependence of mechanical properties of polyamide components on build parameters in the SLS process

Ceramic microparticles and capsules via microfluidic processing of a preceramic polymer

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