Enhancing the fracture resistance of carbon fiber reinforced SiC matrix composites by interface modification through a simple fiber heat-treatment process

Liu, H.T.; Yang, Lingwei; Sun, Xun; Cheng, Haifeng; Wang, C.; Mao, Weiguo; Molina-Aldareguia, J.M.

doi:10.1016/j.carbon.2016.08.047

Cited by 63 publications

(7 citation statements)

References 26 publications

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“…The density of carbon fiber was 1.76 g/cm 3 . The 3D carbon fiber preform was desized by thermal treatment at 1400 ℃ for 1 h [26,27], followed by vacuum impregnation of sol. After soaked in sol for 6 h, the preform was dried at 200 ℃ for 2 h and then heated at 1300 ℃ for 1 h under inert atmosphere with a heating rate of 15 ℃/min.…”

Section: Methodsmentioning

confidence: 99%

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Mechanical properties and thermal stability of carbon fiber cloth reinforced sol-derived mullite composites

Zhang

Zeng

et al. 2019

J Adv Ceram

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For the wide application as thermal protection materials, it is very necessary for mullite ceramics to improve fracture toughness. In this paper, the laminated and stitched carbon fiber cloth preform reinforced mullite (C/mullite) composites were prepared through the route of sol impregnation and heat treatment using the Al 2 O 3 −SiO 2 sol with a high solid content as raw materials. The C/mullite composites showed a flexural strength of 228.9 MPa that was comparable to that of dense monolithic mullite although the total porosity reached 13.4%. Especially, a fracture toughness of 11.2 MPa•m 1/2 that was 4-5 times that of dense monolithic mullite was obtained. Strength deterioration due to the carbothermal reduction between carbon fiber and the residual SiO 2 in matrix was found above 1200 ℃. A pyrolytic C (PyC) coating was deposited on carbon fibers as interfacial coating. The chemical damage to carbon fibers was obviously alleviated by the sacrifice of PyC coating. Accordingly, the C/PyC/mullite composites kept strength unchanged up to 1500 ℃, and showed much higher strength retention ratio than C/mullite composites after annealing at 1600 ℃.

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Section: Methodsmentioning

confidence: 99%

“…It is found from Table 2 that there was a slight decline in the contents of Si and O after annealing at 1200 ℃. This might be caused by carbothermal reduction due to the high reactivity between the disorder carbon on fiber surface [26,27] and a small quantity of unreacted amorphous SiO 2 .…”

Section: Thermal Stability Of C/mullite Compositesmentioning

confidence: 99%

Mechanical properties and thermal stability of carbon fiber cloth reinforced sol-derived mullite composites

Zhang

Zeng

et al. 2019

J Adv Ceram

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“…The pyrolysis temperature was ~1200 ℃ [21]. Prior to the PIP process, a thin layer of pyrocarbon interphase was fabricated at the fiber/matrix interface by chemical vapor deposition (CVD), in order to tailor its bonding strength [22,23].…”

Section: As-received Materials and Structural Characterizationmentioning

confidence: 99%

Dynamic oxidation mechanism of carbon fiber reinforced SiC matrix composite in high-enthalpy and high-speed plasmas

et al. 2022

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This work employed an inductively coupled plasma wind tunnel to study the dynamic oxidation mechanisms of carbon fiber reinforced SiC matrix composite (Cf/SiC) in high-enthalpy and high-speed plasmas. The results highlighted a transition of passive/active oxidations of SiC at 800–1600 °C and 1–5 kPa. Specially, the active oxidation led to the corrosion of the SiC coating and interruption of the SiO2 growth. The transition borders of active/passive oxidations were thus defined with respect to oxidation temperature and partial pressure of atomic O in the high-enthalpy and high-speed plasmas. In the transition and passive domains, the SiC dissipation was negligible. By multiple dynamic oxidations of Cf/SiC in the domains, the SiO2 thickness was not monotonously increased due to the competing mechanisms of passive oxidation of SiC and dissipation of SiO2. In addition, the mechanical properties of the SiC coating/matrix and the Cf/SiC were maintained after long-term dynamic oxidations, which suggested an excellent thermal stability of Cf/SiC serving in thermal protection systems (TPSs) of reusable hypersonic vehicles.

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“…Regarding the metallic coating, the formation of ductile dimples was detected. Liu et al [85] measured the fracture toughness of an in situ-formed, carbon-fiber-reinforced, SiC matrix composite coating using SENB tests coupled with the DIC technique. The crack growth of the composite coatings was detected by the evolution of local strain fields monitored by the DIC (ARAMIS) system.…”

Section: Macro-bending Testingmentioning

confidence: 99%

A Review on In Situ Mechanical Testing of Coatings

et al. 2022

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Real-time evaluation of materials’ mechanical response is crucial to further improve the performance of surfaces and coatings because the widely used post-processing evaluation techniques (e.g., fractography analysis) cannot provide deep insight into the deformation and damage mechanisms that occur and changes in coatings’ material corresponding to the dynamic thermomechanical loading conditions. The advanced in situ examination methods offer deep insight into mechanical behavior and material failure with remarkable range and resolution of length scales, microstructure, and loading conditions. This article presents a review on the in situ mechanical testing of coatings under tensile and bending examinations, highlighting the commonly used in situ monitoring techniques in coating testing and challenges related to such techniques.

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Enhancing the fracture resistance of carbon fiber reinforced SiC matrix composites by interface modification through a simple fiber heat-treatment process

Cited by 63 publications

References 26 publications

Mechanical properties and thermal stability of carbon fiber cloth reinforced sol-derived mullite composites

Mechanical properties and thermal stability of carbon fiber cloth reinforced sol-derived mullite composites

Dynamic oxidation mechanism of carbon fiber reinforced SiC matrix composite in high-enthalpy and high-speed plasmas

A Review on In Situ Mechanical Testing of Coatings

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