Morphology and anti-ablation properties of PIP Cf/C–SiC composites with different CVI carbon content under 4.2 MW/m2 heat flux oxy-acetylene test

Zhu, Yang; Wei, Huali; Liu, Yan; Cui, Hong

doi:10.1016/j.ceramint.2020.09.058

Cited by 10 publications

(3 citation statements)

References 22 publications

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“…Previously, thermochemical ablation behavior and data have been obtained by high-temperature flame experiments and observed by scanning electron microscopy (SEM) [16][17][18][19][20][21][22][23][24]. The results showed that the fibers and matrix were exposed to the atmospheric environment, and there was a thin reactive interphase between the fiber and matrix [25][26][27][28][29][30]. Fan et al [31,32] discovered the needle shapes and sheath package structures of composites, following ablation using a hypersonic flowing propane torch.…”

Section: Introductionmentioning

confidence: 99%

Fast Calculation Method for Predicting the Morphology of Steady-State Ablation

et al. 2022

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Predicting the surface morphology of materials during steady-state ablation is important in rocket motor nozzles and the heat shields of vehicles performing atmospheric re-entry. When designing ablative materials, a high number of calculations is required for analyzing surface morphology. To effectively design these materials and reduce the number of experiments, a fast, effective, and simple calculation method is required. Although a fundamental theory for ablation has been established, quick and effective prediction of the morphology of the composites remains a challenge. In this study, we propose a fast, effective, and simple numerical calculation method to predict the surface morphology of steady-state ablation based on the geometric characteristics of the materials. The results obtained in this study were consistent with the experimental observations. The calculation time was significantly reduced. In addition, our method was found to be useful for analyzing the physical and chemical properties and surface roughness of ablative materials.

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Section: Introductionmentioning

confidence: 99%

Fast Calculation Method for Predicting the Morphology of Steady-State Ablation

et al. 2022

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“…Preceramic polymers (PCPs) are typically regarded as precursors to furnish ceramics with tailorable composition and excellent processability. Various polycarbosilanes (PCSs) with Si atoms linked by methylene (CH 2 ) groups were synthesized and studied as polymeric SiC precursors to prepare C/C–SiC composites by using the PIP process, which was shown to enhance the antioxidation properties of the composites owing to the greater proportion of SiC matrix 13–17 . However, the high melting point of PCS makes it difficult to prepare C/C–SiC ceramic composites.…”

Section: Introductionmentioning

confidence: 99%

“…Various polycarbosilanes (PCSs) with Si atoms linked by methylene (CH 2 ) groups were synthesized and studied as polymeric SiC precursors to prepare C/C-SiC composites by using the PIP process, which was shown to enhance the antioxidation properties of the composites owing to the greater proportion of SiC matrix. [13][14][15][16][17] However, the high melting point of PCS makes it difficult to prepare C/C-SiC ceramic composites. Various functional groups were introduced into the main chain of PCS in an attempt to solve processing difficulties, but this effort did not produce the desired outcome.…”

Section: Introductionmentioning

confidence: 99%

C/C–SiC composites derived from single‐source poly(silylene–acetylene) precursors

Dong

Yuan

et al. 2022

Int J Applied Ceramic Tech

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Carbon-fiber-reinforced carbon-silicon carbide (C/C-SiC) composites were prepared by impregnating carbon fibers with ethynylphenyl-terminated poly(silylene-acetylene) (EPTSA) as a single-source precursor with subsequent hot pressing and pyrolysis. The structural evolution, crystallization behavior, and graphitization of bulk C-SiC ceramics, as well as their mechanical properties and ablation behavior, were investigated. The EPTSA precursor starts to transform into inorganic SiC ceramic materials at 800 • C, which is characterized by an amorphous structure with weight loss, shrinkage, and densification between 800 and 1000 • C. The formation of SiC crystals inhibited the growth of the graphitic structure between 1000 and 1200 • C. As the temperature was raised, both graphite and SiC crystals continued to grow, and the crystalline forms became more complete. The carbon-fiber cloth (T300CF)-reinforced C-SiC composite (T300CF/C-SiC) prepared using polymer infiltration and pyrolysis (PIP) exhibited excellent mechanical properties. After five PIP cycles, the flexural strength, flexural modulus, and interlaminar shear strength of the T300CF/C-SiC composite reached 169 MPa, 32.5 GPa, and 9.38 MPa, respectively. In addition, the chopped-carbon-fiber-reinforced C-SiC composite fabricated using the PIP process demonstrated good oxyacetylene-torch ablation properties.

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The thermal transformation process and mechanical strength evolution of ceramifiable silicone composites

Yang

Jiang

et al. 2021

Ceramics International

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Morphology and anti-ablation properties of PIP Cf/C–SiC composites with different CVI carbon content under 4.2 MW/m2 heat flux oxy-acetylene test

Cited by 10 publications

References 22 publications

Fast Calculation Method for Predicting the Morphology of Steady-State Ablation

Fast Calculation Method for Predicting the Morphology of Steady-State Ablation

C/C–SiC composites derived from single‐source poly(silylene–acetylene) precursors

The thermal transformation process and mechanical strength evolution of ceramifiable silicone composites

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