Mechanical and dielectric properties of carbon fiber reinforced reaction bonded silicon nitride composites

Logesh, G.; Rashad, Mohammed; Lodhe, Mangesh; Sabu, Ummen; Joseph, Andrews; Raju, K. C. James; Balasubramanian, M.

doi:10.1016/j.jallcom.2018.07.208

Cited by 16 publications

(5 citation statements)

References 61 publications

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“…Such improvements in strength because of the pull-out effect and crack deflection have been previously verified by Y. L. Zhang et al [10], who observed a 25 % improvement in mechanical strength when a SiC and carbon fiber composite was added to Al 2 O 3 and La 2 O 3 . It is also consistent with Logesh et al [11] who found a 35 % improvement in compressive strength, up to 437 MPa, when 5 wt% carbon fiber was added to a silicon nitride matrix. When more than 20 wt% basalt-fiber was added, as shown in Figure 1, the pore volume increased while the amount of closed pores decreased, resulting in reduced compressive strength.…”

Section: Resultssupporting

confidence: 91%

Properties of basalt-fiber reinforced foam glass

Kim

Song

2020

Journal of Asian Ceramic Societies

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The changes in mechanical properties and thermal conductivities of fiber reinforced foam glass produced by adding 0~50 wt% basalt-fibers to 10 µm glass powder containing 6 wt% nanocarbon via low-temperature sintering at 750°C were examined. The prepared basalt-fibers had an aspect ratio of 70.88. To study the microstructure of the foam glass, optical microscopy and scanning electron microscopy were conducted. To assess the mechanical properties and thermal conductivity of the sample, a compressive strength tester and a heat flowmeter were used, respectively. The sample was confirmed to have closed pores up to the addition of 15 wt% basalt-fiber, with open pores being observed from 20 wt% or more. Microstructure analysis showed that the sample was shown to have dense basalt-fiber clusters with an even distribution of pores at 13 wt% basalt-fibers, whereas irregular pores formed with more basaltfiber addition. Compressive strength was increased by approximately 48 % compared to the sample without basalt-fiber addition while the sample with 13 wt% basalt-fibers showed gradual improvement up to a total of 2.96 MPa and then a gradual decrease with more addition. The thermal conductivity was seen to increase from 0.16 to 0.28 W/m•K with increasing basalt-fiber addition; nevertheless, the properties were suitable for using the samples as a thermal insulator.

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Section: Resultssupporting

confidence: 91%

Properties of basalt-fiber reinforced foam glass

Kim

Song

2020

Journal of Asian Ceramic Societies

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“…Indeed, to increase the surface area available for bonding and enhance load transfer between fibre and matrix, one possibility is to grow nanowires, nanotubes or whiskers on the surface of the fibre that could protrude into the matrix [31][32][33][34]. The whiskering process involves the nucleation and growth of single high-strength crystals such as silicon carbide (SiC) [35], titanium dioxide (TiO 2 ) [36], silicon nitride (Si 3 N 4 ) [37] and zinc oxide (ZnO) [38,39]. Zinc oxide, in particular, has proved to be of great interest in the scientific community for its distinctive properties, including a wide bandgap of 3.4 eV and relatively large exciton binding energy of 60 meV, excellent chemical stability, nontoxicity, and good electrical, optical, and piezoelectric properties [40,41].…”

Section: Introductionmentioning

confidence: 99%

Interface tailoring between flax yarns and epoxy matrix by ZnO nanorods

Sbardella

Lilli

Seghini

et al. 2021

Composites Part A: Applied Science and Manufacturing

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The ideal mechanical performance of a composite is controlled by the level of interfacial adhesion and to overcome the incompatibility issues between plant fibres and polymeric matrices, the surface of flax yarns has been modified by zinc oxide (ZnO) nanostructures. The ZnO nanorods were synthesized through a lowtemperature hydrothermal treatment, and several parameters have been analysed in order to obtain a uniform and homogeneous ZnO interphase, such as the number of the seeding cycles, the growth reaction times and the replacement of the growth solution. The results showed that it is possible to obtain highly oriented and well aligned ZnO nanostructures (by FE-SEM), with an hexagonal wurtzite structure (by XRD) and a high degree of coverage along the whole yarn (by TGA), reducing the number of the seed cycles, with rather long growth times (5 hours) and substituting the growth solution at least once during the synthesis. The experimental conditions preserved the breaking force of the yarns, while Single Fibre Fragmentation Tests (SFFT) highlighted a better interfacial adhesion of ZnO-modified flax yarns with epoxy matrix, which displayed a 29 % reduction in average debonding length relative to untreated yarns.

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“…The crystal structure in fibers represents a periodic region with long-range ordered structure, and the arrangement of atoms in the crystal lattice plays a crucial role in the mechanical properties of materials [ 11 ], such as tensile strength [ 12 ], compressive strength, and fracture behavior. Moreover, ceramic fibers with high melting points and thermally stable crystal structures tend to maintain their structural and performance stability in high-temperature environments [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Atomistic Construction of Silicon Nitride Ceramic Fiber Molecular Model and Investigation of Its Mechanical Properties Based on Molecular Dynamics Simulations

Hong,

Zhu,

et al. 2023

Materials

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Molecular simulations are currently receiving significant attention for their ability to offer a microscopic perspective that explains macroscopic phenomena. An essential aspect is the accurate characterization of molecular structural parameters and the development of realistic numerical models. This study investigates the surface morphology and elemental distribution of silicon nitride fibers through TEM and EDS, and SEM and EDS analyses. Utilizing a customized molecular dynamics approach, molecular models of amorphous and multi-interface silicon nitride fibers with complex structures were constructed. Tensile simulations were conducted to explore correlations between performance and molecular structural composition. The results demonstrate successful construction of molecular models with amorphous, amorphous–crystalline interface, and mixed crystalline structures. Mechanical property characterization reveal the following findings: (1) The nonuniform and irregular amorphous structure causes stress concentration and crack formation under applied stress. Increased density enhances material strength but leads to higher crack sensitivity. (2) Incorporating a crystalline reinforcement phase without interfacial crosslinking increases free volume and relative tensile strength, improving toughness and reducing crack susceptibility. (3) Crosslinked interfaces effectively enhance load transfer in transitional regions, strengthening the material’s tensile strength, while increased density simultaneously reduces crack propagation.

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Mechanical and dielectric properties of carbon fiber reinforced reaction bonded silicon nitride composites

Cited by 16 publications

References 61 publications

Properties of basalt-fiber reinforced foam glass

Properties of basalt-fiber reinforced foam glass

Interface tailoring between flax yarns and epoxy matrix by ZnO nanorods

Atomistic Construction of Silicon Nitride Ceramic Fiber Molecular Model and Investigation of Its Mechanical Properties Based on Molecular Dynamics Simulations

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