Al2O3–SiC composites prepared by warm pressing and sintering of an organosilicon polymer-coated alumina powder

Galusek, Dušan; Sedláček, Jaroslav; Riedel, Ralf

doi:10.1016/j.jeurceramsoc.2006.09.007

Cited by 56 publications

(31 citation statements)

References 20 publications

(28 reference statements)

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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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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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“…The conclusions of various authors were certified that adding the filler into the reactoplastics epoxy-based matrix affected the mechanical properties of the resulting composite (Kim and Khamis 2001;Galusek et al 2007;Müller and Valášek 2012;Valášek and Müller 2012). These results agreed with the conclusions of Ge et al (2004), who mentioned the use of biocomposites (bamboo with PVC) in the area of materials for the surface treatment of materials used at wood constructions.…”

Section: Resultsmentioning

confidence: 99%

Strength Characteristics of Untreated Short-fibre Composites from the Plant Ensete ventricosum

Müller¹,

Valášek²,

Ruggiero³

2016

BioResources

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The plant Ensete ventricosum is used in agriculture in Africa. It is a source of fibres, which can be used in the interaction with polymers. This study deals with a material utilization of these fibres with a length of 1 to 2 mm, 2 to 3 mm, and 3 to 5 mm, together with reactoplastics resin ChS Epoxy 1200/324, following requirements of developing countries. Some areas of the African continent suffer from a lack of wood, and material based on epoxy and fibres can substitute for many wood products. The aim of this experiment was to describe basic mechanical properties (tensile strength σm, strain at the break εb, modulus of the elasticity Et, and impact strength an) of the composite material reinforced with fibres of the false banana plant, Ensete ventricosum. The plant, which originated in Ethiopia, is exploitable in developing countries. Geometrical aspects and morphology of the used fibres was characterized by scanning electron microscopy (SEM). The addition of fibres increased the modulus of elasticity and the impact strength, whereas the tensile strength and the strain at break were decreased.

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“…Powders for nanocomposites have been processed through different methods, which can be classified as solid-state processing (mechanical alloying, laser ablation, evaporation-condensation, and self-propagating high-temperature synthesis (SHS)), gas-phase processing (chemical vapour deposition (CVD), plasma, and laser synthesis), and solution chemistry methods (sol-gel, polymer pyrolysis, and spray drying of solutions) (Tomar, 2008;Maitra, 2014;Borsa and Brook, 1995;Caroll, Sternitzke, and Derby, 1996;Niihara et al, 1989;Shapiro, Todd, and Roberts, 2009;Liu, Zhou, and Hou, 2006;Xu, Nakahira, and Niihara, 1994;Galusek, Sedlacek, and Riedel, 2007). Powder processing routes require powders of high purity to avoid the formation of second phases (Zhan et al, 1996).…”

Section: Spark Plasma Sintering (Sps) -An Advanced Sintering Techniquementioning

confidence: 99%

“…In such cases every effort is made to control the rate of drying. An alternative method is freeze drying, which provides optimal conditions that suppress the formation of agglomerates and segregation (Walker et al, 1994;Upadhyaya, 2011) Polymer pyrolysis and sol-gel synthesis routes offer attractive alternative procedures that result in better dispersion at an atomic level (Borsa and Brook, 1995;Liu, Zhou, and Hou, 2006;Xu, Nakahira, and Niihara, 1994;Galusek, Sedlacek, and Riedel, 2007). Furthermore, they are cheaper and involve simple procedures for the production of bulk homogeneous nanopowders.…”

Section: Spark Plasma Sintering (Sps) -An Advanced Sintering Techniquementioning

confidence: 99%

Spark plasma sintering (SPS) - an advanced sintering technique for structural nanocomposite materials

Matizamhuka¹

2016

J. South. Afr. Inst. Min. Metall.

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The consolidation of nano-sized composite materials presents a challenge using conventional hot pressing methods. Spark plasma sintering (SPS) technology has shown great promise in the successful sintering of nanoreinforced composite materials. This qualitative review seeks to impart knowledge gathered, and progress made over the years on the consolidation of nanocomposite materials using SPS technology. The review is aimed at introducing this technology to the South African science and engineering community. Emphasis is on improving the mechanical properties of structural ceramic nanocomposite materials, which over the years have shown great promise in a wide range of applications, including transport, energy, mining, and the environment. Although success has been achieved within the laboratory for research purposes, there are still great opportunities to commercialize the technology for the production of larger components with more complex shapes. ceramic nanocomposites, structural materials, spark plasma sintering, fracture toughness, ceramic matrix composites.

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Al2O3–SiC composites prepared by warm pressing and sintering of an organosilicon polymer-coated alumina powder

Cited by 56 publications

References 20 publications

Ceramic microparticles and capsules via microfluidic processing of a preceramic polymer

Ceramic microparticles and capsules via microfluidic processing of a preceramic polymer

Strength Characteristics of Untreated Short-fibre Composites from the Plant Ensete ventricosum

Spark plasma sintering (SPS) - an advanced sintering technique for structural nanocomposite materials

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