Surface temperature jump beyond active oxidation of carbon/silicon carbide composites in extreme aerothermal conditions

Panerai, Francesco; Helber, Bernd; Chazot, Olivier; Balat‐Pichelin, Marianne

doi:10.1016/j.carbon.2014.01.018

Cited by 64 publications

(19 citation statements)

References 40 publications

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“…Condensed silicon can be explained with Equation but has not been observed in any experiments. However, only a limited number of experiments involve temperatures above 2000 K at this pressure regime . During active oxidation, a thin layer of condensed silicon is easily volatilized into gaseous Si and may only be present in situ.…”

Section: Resultsmentioning

confidence: 99%

“…The experimental transition data in Figure confirm the similarity of both transitions, but hysteresis is rather inconclusive. In fact, in the literature, predictions for A‐P transition have been applied to data from P‐A experiments and compare well …”

Section: Theoretical Modelsmentioning

confidence: 99%

“…Also, combined oxidation and nitridation of SiC in air have not been sufficiently explored . A “temperature jump” phenomenon has been observed in thermal oxidation experiments with SiC composites undergoing P‐A transition, characterized by an abrupt rise in surface temperature. This effect has been linked with an increase in catalycity and surface chemistry that augments the surface heating.…”

Section: Introductionmentioning

confidence: 99%

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Chemical equilibrium analysis of silicon carbide oxidation in oxygen and air

Chen

Boyd

2019

J Am Ceram Soc

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Due to their refractory nature and oxidation resistance, Ultra-High Temperature Ceramic materials, including silicon carbide, are of interest in hypersonic aerospace applications. To analyze the thermodynamic behavior of silicon carbide during transition between passive and active oxidation states, chemical equilibrium calculations are performed. The predicted oxygen pressures for passive-to-active transition show improved agreement up to an order of magnitude with experimental transition data in the literature, compared with Wagner's model. Both oxygen and air environments are examined, and a 3% difference in transition temperature is observed. Material response analysis demonstrates that a surface temperature jump occurs during thermal oxidation of silicon carbide, corresponding to passive-to-active transition.

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Section: Resultsmentioning

confidence: 99%

Section: Theoretical Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Chemical equilibrium analysis of silicon carbide oxidation in oxygen and air

Chen

Boyd

2019

J Am Ceram Soc

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“…Carbon‐bonded carbon fiber (CBCF) composites usually exhibit a highly porous and layered architecture that is assembled by a large amount of chopped carbon fibers with vitreous carbon as binding materials . Because of the low density (0.1‐0.5 g/cm 3 ) and low thermal conductivity, CBCF composites are thought to be a promising candidate for lightweight thermal insulator for applications in aerospace areas . However, due to the brittleness of vitreous carbon junctions, CBCF composites usually show low compression strength .…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5] Because of the low density (0.1-0.5 g/cm 3 ) and low thermal conductivity, CBCF composites are thought to be a promising candidate for lightweight thermal insulator for applications in aerospace areas. [6][7][8][9] However, due to the brittleness of vitreous carbon junctions, CBCF composites usually show low compression strength. 5,[10][11][12] Another obstacle for the practical application of CBCF composites is their poor oxidation resistance at elevated temperature.…”

Section: Introductionmentioning

confidence: 99%

SiOC modified carbon‐bonded carbon fiber composite with SiC nanowires enhanced interfibrous junctions

Wang

et al. 2020

J Am Ceram Soc

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Carbon‐bonded carbon fiber (CBCF) composites are promising lightweight and high efficient thermal insulators to be applied in aerospace area, but their practical applications are usually restricted by the low mechanical performance and poor oxidation resistance. To overcome these drawbacks, many efforts have been made in the fabrication of ceramic coated CBCF composites. However, the densities of these modified composites are usually very high, which would result in the reduction in their thermal insulation performance. Herein, we prepared a CBCF composite with SiC nanowires enhanced interfibrous junctions and SiOC ceramic coated carbon fibers (SiCNWs‐SiOC‐CBCF). Similar to CBCF, the SiCNWs‐SiOC‐CBCF exhibits a low density of 0.35 g/cm3 and an anisotropic and highly porous architecture. The SiCNWs‐SiOC‐CBCF possesses a compressive strength of 3.8 MPa and a compression modulus of 195.7 MPa in the X (or Y) direction, ~26.7% and 150% higher than those of CBCF respectively. It can also suffer from an isothermal treatment in air at 900°C for 120 minutes. The combination of these properties makes the SiCNWs‐SiOC‐CBCF a good candidate for thermal insulator to be applied in extreme conditions.

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Raman detection system for in situ oxidation and ablation analysis in hypersonic wind tunnel

et al. 2022

J Raman Spectroscopy

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We have developed a system for remote Raman spectra detection in hypersonic wind tunnel, which can be used in extreme environments such as ultra‐high temperature, high pressure, and complex airflow to measure in situ Raman spectra of ceramic matrix composites during oxidation, phase transformation or ablation. The designed system avoids stray light generated by windows and airflow through oblique incidence of excitation light. The time‐resolved method combined with pulsed laser and intensified charge‐coupled device (ICCD) was used to reduce the thermal emission background. An optical structure design based on fiber bundle is adopted to suppress the influence of aero‐optical effects and mechanical vibration on Raman spectrum acquisition. We demonstrated the feasibility of in situ Raman spectra detection in a Mach 5 combustion wind tunnel system. The design of anti‐interference prevents Raman spectra intensity from the influence of wind tunnel testing conditions.

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Surface temperature jump beyond active oxidation of carbon/silicon carbide composites in extreme aerothermal conditions

Cited by 64 publications

References 40 publications

Chemical equilibrium analysis of silicon carbide oxidation in oxygen and air

Chemical equilibrium analysis of silicon carbide oxidation in oxygen and air

SiOC modified carbon‐bonded carbon fiber composite with SiC nanowires enhanced interfibrous junctions

Raman detection system for in situ oxidation and ablation analysis in hypersonic wind tunnel

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