Changes in microstructure and mechanical properties of the carbon fiber and their effects on C/SiC composites

Hao, Jianjie; Li, Jiayan; Shi, Xiaolei; He, Ping; Shi, Wei; Tan, Yi

doi:10.1016/j.matchar.2022.112334

Cited by 6 publications

(4 citation statements)

References 41 publications

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“…25 Conductive fillers are widely used in CPCs because of their excellent electrical conductivities. [26][27][28][29][30] The conductive network formed by overlapping conductive particles makes the insulating matrix electrically conductive, and CPCs with a resistance-strain response can be applied. Flandin et al 31 mixed CB and ethyleneoctene elastomer and investigated the reversible variation in resistivity of the composites at 20% strain.…”

Section: Introductionmentioning

confidence: 99%

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Improving resistance–strain effects of conductive polymer composites modified by multiscale fillers: Short carbon fiber and carbon nanotube

Niu,

Zhang,

Yao

et al. 2024

Polymer Composites

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Conductive polymer composites (CPCs) have attracted much attention in strain sensing applications due to their excellent conductivities and high sensitivities. However, research on simultaneous modification of CPCs with multiple conductive fillers is lacking. This study aims to systematically investigate the electrical conductivities and strain‐sensing properties of two filler‐modified epoxy resin (EP) composites with different scale additives—short carbon fibers (SCFs) and carbon nanotubes (CNTs)—obtained by mixing and curing to obtain the samples. Both the SCF/EP and SCF/CNT/EP composite resistivities decreased with increasing filler content, and 1.35 wt% was the percolation threshold for SCF/EP composites; during monotonic tensile loading, the resistance change ratio (ΔR/R0) of the CPCs increased with increasing strain, and the sensitivities decreased with increasing conductive filler content. The CPCs containing SCFs and CNTs exhibited stable and repeatable resistance responses during cyclic tensile loading, among which the SCF/CNT_1.5/0.3 composite was the most suitable for use as a sensing material with a sensitivity of 0.149. According to the conductivity and resistance–strain response mechanism analysis, the CNTs supplementing and refining the CPC conductive network composed of SCFs were considered the main reason for the resistance response linearization and excellent dynamic response repeatability. CPCs can be widely used in strain sensing and damage monitoring.Highlights Provided a strategy for multiscale conductive filler‐modified epoxy resins. Realized monotonicity of resistance–strain response by adding multiscale conductive fillers. Explored resistance‐strain effect under dynamic cycling loading. Identified optimal materials for damage detection. Analyzed the resistance–strain response mechanism of single and multiscale conductive filler‐modified CPCs.

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Section: Introductionmentioning

confidence: 99%

“…Conductive fillers are widely used in CPCs because of their excellent electrical conductivities 26–30 . The conductive network formed by overlapping conductive particles makes the insulating matrix electrically conductive, and CPCs with a resistance–strain response can be applied.…”

Section: Introductionmentioning

confidence: 99%

Improving resistance–strain effects of conductive polymer composites modified by multiscale fillers: Short carbon fiber and carbon nanotube

Niu,

Zhang,

Yao

et al. 2024

Polymer Composites

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“…[1][2][3][4] Throughout the series of composites, fiber-reinforced polymers are the most attractive ones. [5][6][7] Although several kinds of fibers are employed in the fabrication of laminated composites, kevlar and glass fibers are extensively used due to their high uniaxial strength, impact resistance, toughness, and specific strength. 8 Kevlar exhibits a significant degree of anisotropy, whereas its physical and mechanical properties are notably superior in the lengthwise orientation.…”

Section: Introductionmentioning

confidence: 99%

“…In engineering structures, fiber‐reinforced polymers are implemented in sports equipment to navy ships, helicopters, the automotive industry, aerospace, and bridge construction 1–4 . Throughout the series of composites, fiber‐reinforced polymers are the most attractive ones 5–7 . Although several kinds of fibers are employed in the fabrication of laminated composites, kevlar and glass fibers are extensively used due to their high uniaxial strength, impact resistance, toughness, and specific strength 8 .…”

Section: Introductionmentioning

confidence: 99%

Development and characterization of kevlar and glass fibers reinforced epoxy/vinyl ester hybrid resin composites

Ahmad,

Shah,

Afaq

et al. 2024

Polymer Composites

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This research investigates the influence of kevlar and glass fiber reinforcements on the mechanical and thermal properties of epoxy/vinyl ester (hybrid resin) composite. The hybrid resin was synthesized by achieving an interpenetrating network between epoxy and vinyl ester. The composites were characterized using tensile, flexural, impact, and thermo‐gravimetric analysis (TGA). Scanning electron microscopy was employed to analyze surface morphology whereas Fourier‐Transformation Infrared Spectroscopy (FT‐IR) was used to investigate the possible interaction between the constituents of the composites. The findings have shown a notable improvement in the mechanical properties after the hybridization of the resin. For reference, the tensile strength of glass/hybrid resin and kevlar/hybrid resin composites were observed to increase by 8.33% and 23.65%, as compared to glass/epoxy and kevlar epoxy composites respectively, whereas, the bending strength of these composites was improved by 8.36% and 30.61%, respectively. TGA also showed an enhanced thermal stability of the hybrid resin‐based composites. Such improvements are noticed due to multi‐resin incorporation (the oxirane group of epoxy reacts with the hydroxyl group of vinyl ester), confirmed by the FTIR, TGA, and morphological analysis. This study signifies that the proposed hybrid composites are better in terms of strength and modulus relative to conventional metallic materials.Highlights The paper presents the development of novel hybrid resin, reinforced with synthetic fibers. Hybrid resin is imparted positively and is highly favorable in improving the mechanical properties of composites. The tensile strength of novel composites is increased by 8.33% and 23.65% relative to their base specimens, and a similar trend is observed in flexural and impact analysis. Fractured analysis showed that composite laminates deteriorated more intensely due to cohesive matrix fracture; adhesion failure was not observed at all, as evidenced by the emergence of micro‐cracks in resin. Developed novel composites exhibited maximum thermal stability; residual char in glass/epoxy/vinyl‐ester composite attained 17.81% higher, whereas kevlar/epoxy/vinyl‐ester achieved 3.56% relative to glass/epoxy and kevlar/epoxy base samples.

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Microstructure and mechanical properties of continuous carbon fiber-reinforced SiC ceramic composite fabricated by direct ink writing

Huang,

Chen,

et al. 2024

Ceramics International

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Changes in microstructure and mechanical properties of the carbon fiber and their effects on C/SiC composites

Cited by 6 publications

References 41 publications

Improving resistance–strain effects of conductive polymer composites modified by multiscale fillers: Short carbon fiber and carbon nanotube

Improving resistance–strain effects of conductive polymer composites modified by multiscale fillers: Short carbon fiber and carbon nanotube

Development and characterization of kevlar and glass fibers reinforced epoxy/vinyl ester hybrid resin composites

Microstructure and mechanical properties of continuous carbon fiber-reinforced SiC ceramic composite fabricated by direct ink writing

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