Effects of random chopped fiber on the flexural strength and toughness of reaction bonded silicon carbide composite

Li, Shuang; Zhang, Yumin; Han, Jiecai; Zhou, Yanjun

doi:10.1016/j.ceramint.2012.02.053

Cited by 20 publications

(9 citation statements)

References 22 publications

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“…Hence, during recent years, short fiber reinforcement has attracted much attention from scientific community because of the efficient dispersion possible in the matrix phase adopting trivial dispersion procedures, such as ball milling, convenience, and lower cost. In addition, the use of short fibers provides flexibility to cast the composite in near‐net shape structures avoiding clumping of the matrix and clustering of fibers . Moreover, well exfoliated whiskers or rod shaped short fibers result in larger number of fibers per unit volume providing significantly higher surface area and stronger interfacial bonding with the matrix phase .…”

Section: Introductionmentioning

confidence: 99%

Short silica fiber composites with simultaneous interpenetrating polymer networks constituted by siloxane and phenolic systems

et al. 2017

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Short silica fiber reinforced simultaneous interpenetrating polymer network (IPN) composites comprising of siloxane and resole phenolic units were synthesized through curing of polymethylsilsesquioxane (PMSQ) and phenolic polymer systems along with short silica fibre. IPNs were formed at various PMSQ/phenolic ratios, while weight percentage of silica short fiber was kept at 60% (by weight). The formation of IPN was confirmed by FTIR, TGA and DMA. The effect of IPN composition on the mechanical, thermal, thermo‐physical and dynamic mechanical properties was investigated. The variation in properties was well correlated with the morphological and phase distribution features of IPN and the interaction of matrix with silica fiber. It was found that phenolic addition improved the properties of PMSQ‐silica composite system substantially and the optimal obtained was with 25% phenolic for most of the properties (compressive and flexural strength, toughness and thermal conductivity) due to the complete miscibility of the resultant IPN and its superior interaction with silica fiber. Tensile strength and impact strength showed increasing trend with phenolic content. However, the char residue got decreased with increase in phenolic content. This study shows that the synergy of PMSQ and PF polymeric systems in the form of IPN is worthwhile to be explored further for various potential applications. POLYM. COMPOS., 39:4010–4019, 2018. © 2017 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%

Short silica fiber composites with simultaneous interpenetrating polymer networks constituted by siloxane and phenolic systems

et al. 2017

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“…To improve the fracture toughness, SiC composites reinforced with short C fibers (C sf /SiC) have been extensively studied recently. In the past, the research of C sf /SiC composites was mainly focused on preparation methods (such as hot pressing, spark plasma sintering, and liquid silicon infiltration ), and mechanical properties characterization (bending strength, fracture toughness, and tribological properties ). Processing ceramics with a multilayer structure is another effective method to improve toughness .…”

Section: Introductionmentioning

confidence: 99%

Thermophysical Properties of Short Carbon Fiber/SiC Multilayer Composites Prepared by Tape Casting and Pressureless Sintering

Yang

Biamino

Padovano

et al. 2013

Int J Applied Ceramic Tech

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Csf/SiC multilayer composites for thermal conductivity (TC) test in three directions were successively prepared by tape casting and pressureless sintering. After 1500°C/5 h oxidation treatment, short carbon fibers were oxidized which produced many pores. However, a core area, which was composed by short carbon fiber, SiC, and few SiO2, was still observed. TC properties of Csf/SiC multilayer composites were highly anisotropic. The TC was decreased with the increase in fiber amount. Csf/SiC multilayer composites demonstrated the highest TC along the tape casting direction and the lowest TC through the thickness direction, which is favorable for thermal protection purpose.

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“…The main reason for this is their low cost, ease in fabrication, and flexibility in casting to near-net shape [14][15][16][17][18]. Furthermore, in order to make the use of SFRCs for such applications commercially viable, efforts have been made (and continue) to reduce their processing time and cost using novel methods and techniques [4,19,20].…”

Section: Preparation Of C/c Compactsmentioning

confidence: 99%

Influence of hot-pressing pressure on the densification of short-carbon-fiber-reinforced, randomly oriented carbon/carbon composite

Raunija¹

2015

Carbon letters

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The prime objective of this research was to study the influence of hot-pressing pressure and matrix-to-reinforcement ratio on the densification of short-carbon-fiber-reinforced, randomly oriented carbon/carbon-composite. Secondary objectives included determination of the physical and mechanical properties of the resulting composite. The 'hybrid carbon-fiberreinforced mesophase-pitch-derived carbon-matrix' composite was fabricated by hot pressing. During hot pressing, pressure was varied from 5 to 20 MPa, and reinforcement wt% from 30 to 70. Densification of all the compacts was carried at low impregnation pressure with phenolic resin. The effect of the impregnation cycles was determined using measurements of microstructure and density. The results showed that effective densification strongly depended on the hot-pressing pressure and reinforcement wt%. Furthermore, results showed that compacts processed at lower hot-pressing pressure, and at higher reinforcement wt%, gained density gradually during three densification cycles and showed the symptoms of further gains with additional densification cycles. In contrast, samples that were hot-pressed at moderate pressure and at moderate reinforcement wt%, achieved maximum density within three densification cycles. Furthermore, examination of microstructure revealed the formation of cracks in samples processed at lower pressure and with low reinforcement wt%.

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Effects of random chopped fiber on the flexural strength and toughness of reaction bonded silicon carbide composite

Cited by 20 publications

References 22 publications

Short silica fiber composites with simultaneous interpenetrating polymer networks constituted by siloxane and phenolic systems

Short silica fiber composites with simultaneous interpenetrating polymer networks constituted by siloxane and phenolic systems

Thermophysical Properties of Short Carbon Fiber/SiC Multilayer Composites Prepared by Tape Casting and Pressureless Sintering

Influence of hot-pressing pressure on the densification of short-carbon-fiber-reinforced, randomly oriented carbon/carbon composite

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