Tensile Strength of Carbon–Carbon Composites: II – Effect of Heat Treatment Temperature

Hatta, Hiroshi; Aoi, Tatsuji; Kawahara, Itaru; Kogo, Yasuo

doi:10.1177/0021998304044764

Cited by 16 publications

(16 citation statements)

References 14 publications

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“…14 as functions of the interfacial debonding stress, where the data are set into groups by the number of HIP cycles, because of the fiber degradation. For comparison purpose, the fracture strains of 2D-C/Cs fabricated by resin-char method (reinforced by the same fiber, IM600, and treated by the same HTT, 2300 • C) 20 are also plotted in this figure. It follows from this figure that the strengths of the HIPed C/Cs decrease with increasing interfacial strength, and the decrease rate is nearly the same as the resin-charred C/Cs.…”

Section: Tensile Strengthmentioning

confidence: 99%

“…The present study about threedimensionally fiber-reinforced C/Cs (3D-C/Cs) has done within this framework study. One of the characteristics of laminate (2D-) C/Cs is poor interlaminar shear strength (5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) MPa) that comes from lack of reinforcement in the thickness direction. Thus, 2D-C/Cs can be applied to the structures that sustain only in-plane stress field.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Tensile strength and fiber/matrix interfacial properties of 2D- and 3D-carbon/carbon composites

Hatta

Goto

Ikegaki

et al. 2005

Journal of the European Ceramic Society

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Section: Tensile Strengthmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tensile strength and fiber/matrix interfacial properties of 2D- and 3D-carbon/carbon composites

Hatta

Goto

Ikegaki

et al. 2005

Journal of the European Ceramic Society

Self Cite

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“…The static uniaxial tension test is the most widely used mechanical test, which is conducted to determine tensile strength, elastic modulus, and %strain of the material. Researchers have reveled that the tensile strengths of the C/Cs are usually much less than the rule of mixture, because it depends on the parameters like, microstructure, density of matrix, fiber/matrix interface, and overall structure whether it is a woven or laminated type [15–18]. Among these, the tensile properties are sensitive to the interfacial strength.…”

Section: Resultsmentioning

confidence: 99%

Effects of graphite filler loading and heat treatment temperature on the properties of phenolic resin based carbon–carbon composites

2011

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Carbon/carbon composites (C/Cs) were prepared through polymer pyrolysis using PAN based carbon fabric (Panex (R) 35) and resol type phenolic resin having 0, 10, 20, 30, and 40 wt% of graphite fillers. These precursor composites were heat treated at 600, 900, and 12008C. The effects of filler loading on the precursor composites and their C/Cs were investigated through density, microstructure, and mechanical properties. Since, the precursor composites were prepared under similar processing conditions and technique, at any particular filler loading when the heat treatment temperature increases, the bulk density of the samples decreases. The filler addition accelerates the formation of the carbon basal planes in the matrix supported by X-ray diffraction studies. The properties such as tensile strength and strain decrease continuously mainly due to change in the matrix structure and decrease of density, whereas, the interlaminar shear strength (ILSS) and interlaminar fracture toughness (ILFT) increase mainly because of improvement in the modulus of matrix. At any particular heat treatment temperature, depending on the filler content and matrix type, the density, tensile properties, ILSS, and ILFT of the samples show different trends. POLYM. COMPOS., ªThe corresponding values within parentheses and square brackets stand for the interlaminar shear strength (ILSS) in MPa and interlaminar fracture toughness [ILFT] in J/m 2 , respectively.

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“…Meanwhile, as the main load-carrying component, the continuous carbon bers with a volume fraction of 40% played an important role in the mechanical properties of C/SiC composites. Excessive annealing temperature might result in the degraded ber in-situ strength [27].…”

Section: Mechanical Properties Of the C/sic Composites With Various Pmentioning

confidence: 99%

Enhanced Mechanical Property of RMI C/SiC Composites with Optimized Porous Carbon Structure by Heat Treatment

Guo¹,

Z²,

Li³

et al. 2020

Preprint

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C/SiC composites were fabricated by reactive melt infiltration (RMI) using porous C/C preforms as the skeleton, followed by the infiltration of molten silicon. A convenient technique of heat treatment in the range of 1500 to 2400 oC was applied to modify the porous carbon structure. The effects of heat treatment on the porous C/C preforms and the as-synthesized C/SiC composites were investigated in detail. The results show that the optimal porous carbon structure could be obtained after heat treatment at 1500 oC. After 1500 oC heat treatment, the median pore size and porosity of the porous C/C preform were 9.3 µm and 13.65% respectively, which were in favor of the subsequent infiltration of molten Si. The C/SiC composites with the optimized porous carbon structure showed a dense and uniform morphology without obvious cracks. Their bending strength could be up to 276 MPa, which was 28% higher than that of the C/SiC composites with untreated C/C preforms. However, with the increasing heat treatment temperature (2400 oC), the bending strength of the as obtained composites began to decrease because of the degradation of in-situ fiber strength. The optimized C/SiC composites exhibited a typical pseudo-plastic fracture behavior with obvious fiber pull-out. The improved mechanical property could be ascribed to the lower porosity of composites, the higher in-situ strength of fibers and the reduced matrix cracks.

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Tensile Strength of Carbon–Carbon Composites: II – Effect of Heat Treatment Temperature

Cited by 16 publications

References 14 publications

Tensile strength and fiber/matrix interfacial properties of 2D- and 3D-carbon/carbon composites

Tensile strength and fiber/matrix interfacial properties of 2D- and 3D-carbon/carbon composites

Effects of graphite filler loading and heat treatment temperature on the properties of phenolic resin based carbon–carbon composites

Enhanced Mechanical Property of RMI C/SiC Composites with Optimized Porous Carbon Structure by Heat Treatment

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