Characterization of a silicon carbide thin layer prepared by a self-propagating high temperature synthesis reaction

Kim, Bong G.; Choi, Yong; Lee, Jung W.; Lee, Young W.; Kim, Gil M.

doi:10.1016/s0040-6090(00)01266-9

Cited by 6 publications

(3 citation statements)

References 13 publications

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“…This is because after HT the graphitization degree of the PyC in samples CT1–CT4 increases, which reduces the diffusion rate of carbon in the PyC layer. So the subsequent silicon–carbon reaction rate decreases relatively, resulting in reduced SiC formation 34 . Typical Raman spectra of the PyC before and after HT are shown in Figure 6.…”

Section: Resultsmentioning

confidence: 99%

“…This is because after HT the graphitization So the subsequent silicon-carbon reaction rate decreases relatively, resulting in reduced SiC formation. 34 Typical Raman spectra of the PyC before and after HT are shown in Figure 6. The graphitization degree can be characterized by the intensity ratio (denoted as R −1 ) of the D-band (∼1360 cm −1 ) to the G-band (∼1580 cm −1 ).…”

Section: Effect Of Bulk Density and Heat Treatment Of C/c Preforms On...mentioning

confidence: 99%

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Effects of density and heat treatment of C/C preforms on microstructure and mechanical properties of C/C–SiC composites

Wang

Wen

et al. 2022

Int J Applied Ceramic Tech

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Twill multidirectional carbon-fiber-reinforced carbon and silicon carbide composites (i.e., C/C-SiC) were prepared via chemical vapor infiltration combined with reactive melt infiltration process. The effect of heat treatment (HT) on the microstructure and mechanical properties of C/C-SiC composites obtained by C/C preforms with different densities was thoroughly investigated. The results show that as the bulk density of C/C preforms increases, the thickness of the pyrolytic carbon (PyC) layer increases and open pore size distribution narrows, making the bulk density and residual silicon content of C/C-SiC composites decrease. Moreover, the flexural strength and tensile strength of the C/C-SiC composites were improved, which can be attributed to the increased thickness of the PyC layer. The compressive strength reduces due to the decrease of the ceramic phase content. HT improves the graphitization degree of PyC, which reduces the silicon-carbon reaction rate and thereby the content of the SiC phase. HT induces microcracks and porosity but not obviously affects the mechanical properties of C/C-SiC composites. However, the negative impact of HT can be compensated by the increased density of the C/C preforms.

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Section: Resultsmentioning

confidence: 99%

Section: Effect Of Bulk Density and Heat Treatment Of C/c Preforms On...mentioning

confidence: 99%

Effects of density and heat treatment of C/C preforms on microstructure and mechanical properties of C/C–SiC composites

Wang

Wen

et al. 2022

Int J Applied Ceramic Tech

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“…To study the force and heat of the rudderpost, 1#, 2# and 3# rudderpost samples were prepared, and the test parts installation is shown in Figure 1 [4].…”

Section: Problem Descriptionmentioning

confidence: 99%

Preparation Process and Optimization Design for Composites Rudderpost in the Long-Time High Temperature Environment

Beijing¹

2017

MSCE

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Rudder is an important part for the glider aircraft. In order to satisfy the longtime high-velocity for the near-space vehicle in the atmosphere, the lightweight, high-stiffness and high-strength all-composites rudderpost is required urgently to be prepared. The all-composites rudderpost can keep high rudder efficiency in the high temperature environment. Based on the technique requirement of high-performance composites rudder, a 3D C/SiC rudderpost was manufactured by the CVI-CMC-SiC [1] processes. It was found during rudderpost testing that the high-temperature mechanical properties decreased and had large discretization. The analysis of the failure mechanisms was conducted by FTA method to recognize the failure modes and main reasons for rudderpost abnormal fracture and to reproduce the fracture phenomenon, which could guide production company to modify their preparation process control. Then the modified processes were proved to be validated. And the stability and reliability of the production performances were improved.

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Vat photopolymerization of large-aperture high performance SiC mirror through multiphase carbon infiltration modification

Li,

Cui,

et al. 2024

Additive Manufacturing

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Characterization of a silicon carbide thin layer prepared by a self-propagating high temperature synthesis reaction

Cited by 6 publications

References 13 publications

Effects of density and heat treatment of C/C preforms on microstructure and mechanical properties of C/C–SiC composites

Effects of density and heat treatment of C/C preforms on microstructure and mechanical properties of C/C–SiC composites

Preparation Process and Optimization Design for Composites Rudderpost in the Long-Time High Temperature Environment

Vat photopolymerization of large-aperture high performance SiC mirror through multiphase carbon infiltration modification

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