Comparison of morphology and microstructure of ablation centre of C/SiC composites by oxy-acetylene torch at 2900 and 3550°C

Chen, Zhaofeng; Fang, Dan; Miao, Yunliang; Yan, Bo

doi:10.1016/j.corsci.2008.07.019

Cited by 65 publications

(20 citation statements)

References 20 publications

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“…Mei et al firstly analyzed behavior of 2‐dimensional C/SiC composites subjected to thermal cycling in controlled environments. Chen et al investigated the microstructure and ablation properties of 2‐dimensional, 2.5‐dimensional, and 3‐dimensional C/SiC composites by oxy‐acetylene flame with different temperature, respectively. It is shown that thermal decomposition and oxidation of SiC matrix were the main ablation behavior at relative lower temperature, while subliming of carbon fiber and silicon carbide matrix was the main ablation behavior at relative higher temperature.…”

Section: Introductionmentioning

confidence: 99%

Microstructure Evolution and Ablation Mechanism of C/C and C/C‐SiC Composites Under a Hypersonic Flowing Propane Torch

Jin

Jiang

Wang³

2017

Adv Eng Mater

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The high-velocity oxygen fuel thermal spray system can provide a hypersonic flowing environment in which the temperature, pressure, and speed are all sufficiently high to represent a more realistic environment of hypersonic vehicles than that produced by traditional oxyacetylene flame. In this work, the ablation resistance of C/C and C/C-SiC composites under hypersonic flowing propane flame is investigated, and the microstructure evolution during the ablation process is examined. It is found that different ablation regions are formed depending on the size, and the distributions of temperature and pressure on the front surface of the samples. With the increase of ablation time, a dense and continuous oxide layer forms, which acts as a barrier to prevent the interaction of oxidizing gases and composites, and can also block the conducted heat and resist high temperature scouring of hypersonic flowing flame. In addition, a numerical analysis is performed using ANSYS Fluent software to investigate the fields of velocity, pressure, and temperature on the front surface and around the carbon fibers of the sample. The simulation results further demonstrate the evolution of microstructures of C/C and C/C-SiC composites.

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Section: Introductionmentioning

confidence: 99%

Microstructure Evolution and Ablation Mechanism of C/C and C/C‐SiC Composites Under a Hypersonic Flowing Propane Torch

Jin

Jiang

Wang³

2017

Adv Eng Mater

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“…However, in addition to their relatively high cost, one of the major problems of the CMC/carbon based protection systems is their poor oxidative behavior: under exposure to a hot oxidative gas, a notable bulk material mass loss is observed due to chemical reactions with oxygen and water vapour. These phenomena have been reported by many authors [6][7][8][9][10] and more reliable carbon based systems have been searched for.…”

Section: Introductionmentioning

confidence: 72%

Ablation Properties of C Fibers and SiC Fibers Reinforced Glass Ceramic Matrix Composites Upon Oxyacetylene Torch Exposure

Beaudet

Cormier²,

Dragon³

et al. 2011

MSA

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The ablation properties of two laminated composites, having both a glass ceramic matrix and different kinds of fibers (C or SiC) with the same architecture, are evaluated and compared. Ablation tests are performed using an oxyacetylene torch on samples having two different thicknesses. Mass loss and ablation depth are measured after flame exposure. The results obtained show that the decomposition of SiC fibers during thermal exposure has a significant impact on ablation behavior. Oxidation of SiC produces a liquid SiO<sub>2</sub> film at the top of the material during ablation. This leads to an improved ablation resistance compared to the glass ceramic matrix/C composite, especially in case of successive flame exposures where the SiO<sub>2</sub> film consumes a substantial fraction of the heat flow during its liquefaction upon re-heating

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“…Since silicon carbide (SCP) has been reported to be beneficial for improving the ablation properties,17‐18, 20 the effects of SCP incorporation into the composites on the physical and ablation properties were explored as shown in Figures 3 and 4. At a CF content of 3.5 wt %, the SCP content was varied from 0 to 10%.…”

Section: Resultsmentioning

confidence: 99%

“…The temperature at the back face of the specimen was measured to assess the ablation performance of the silicone rubber composites. A new method for an integrated evaluation of the ablation properties was proposed, taking into consideration the rate of thermal degradation as well as the mechanical strength of the charred composite formed under the oxy‐acetylene torch test 10, 18, 19. The mechanical properties of silicone rubber composites were also examined as a function of the additive content.…”

Section: Introductionmentioning

confidence: 99%

Effect of incorporation of carbon fiber and silicon carbide powder into silicone rubber on the ablation and mechanical properties of the silicone rubber‐based ablation material

Kim

Lee

Shin

et al. 2010

J of Applied Polymer Sci

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This study examined the effects of the incorporation of carbon fiber (CF) and silicon carbide powder (SCP) into a high temperature vulcanized (HTV) silicone rubber, poly(dimethylsiloxane) (PDMS) containing vinyl groups on the ablation properties using an oxy-acetylene torch test. The ablation test results showed that CF enhanced the hardness of the char formed on the composite surface during the oxy-acetylene torch test and was an important factor determining the ablation properties. SCP was also beneficial in enhancing the surface char hardness of the HTV/CF composite. A new method was devised to evaluate the ablation properties more objectively by measuring the time elapsed for a rectangular-shaped silicone rubber composite with specimens loaded with a constant weight to burn and fail off during the oxy-acetylene torch test. The mechanical properties of the silicone rubber composites were also examined as a function of the additive content using a universal test machine (UTM). V C 2010 Wiley Periodicals, Inc. J Appl Polym Sci 120: 831-838, 2011

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Comparison of morphology and microstructure of ablation centre of C/SiC composites by oxy-acetylene torch at 2900 and 3550°C

Cited by 65 publications

References 20 publications

Microstructure Evolution and Ablation Mechanism of C/C and C/C‐SiC Composites Under a Hypersonic Flowing Propane Torch

Microstructure Evolution and Ablation Mechanism of C/C and C/C‐SiC Composites Under a Hypersonic Flowing Propane Torch

Ablation Properties of C Fibers and SiC Fibers Reinforced Glass Ceramic Matrix Composites Upon Oxyacetylene Torch Exposure

Effect of incorporation of carbon fiber and silicon carbide powder into silicone rubber on the ablation and mechanical properties of the silicone rubber‐based ablation material

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