Thermal shock resistance of a 2D-C/SiC composite and its damage mechanisms

Zhang, C.; Wang, H.; Liu, Y.; Qiao, Shuqing; Li, M.; Han, Daoyang; Zhang, J.; Guo, Yong

doi:10.1179/1743676113y.0000000120

Cited by 14 publications

(7 citation statements)

References 29 publications

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“…Therefore, the thermal cycles introduce progressively more damage in the 2.5D-C/SiC specimens than the annealing, and in this way degrade their tensile properties. Similar result can also be found for 2D-C/SiC [40]. Fig.…”

Section: Discussionsupporting

confidence: 88%

Tensile strength degradation of a 2.5D-C/SiC composite under thermal cycles in air

Zhang

Zhao

Liu

et al. 2016

Journal of the European Ceramic Society

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The present work investigated the effects of the thermal cycles in air on the tensile properties of a 2.5 dimensional carbon fiber reinforced silicon carbide composite (2.5D-C/SiC) in weft and warp direction, prepared by low-pressure chemical vapor infiltration. The composite was exposed to different thermal cycles between 900 ºC and 300 ºC in air. The fracture morphologies of the failed composite were examined by a scanning electron microscope to investigate the underlying damage mechanisms. It is found that the composite can retain its tensile strength within 40 thermal cycles. Comparatively, the modulus of 2.5D-C/SiC decreases with increasing thermal cycles. Extensive pullout of fibers on the fractured surface and interface debonding suggest that the damage caused by the thermal cycles involves weakening of the bonding strength of coating/composite and fiber/matrix. The above damage supply the channel for the oxidation of PyC and carbon fibers in the composites.In addition, the degradation in warp direction is faster than that in weft direction.

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Section: Discussionsupporting

confidence: 88%

Tensile strength degradation of a 2.5D-C/SiC composite under thermal cycles in air

Zhang

Zhao

Liu

et al. 2016

Journal of the European Ceramic Society

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“…16 The oxidation of fibre/matrix PyC interface will not only weaken the interfacial bonding between the matrix and the fibre but also degrade the load transfer ability through the interface. 17 because of oxidation, which can decrease the effective loaded area and lead to insufficient load transportation. This can be evidenced by the fact that the CVD-SiC-2 coating showed superior performance than the PSN and inferior performance than the glass coating.…”

Section: Microstructures Of Fracture Sectionsmentioning

confidence: 99%

Oxidation resistance comparison of coating repaired mechanical cracks in carbon fibre reinforced silicon carbide composite

Hui

Tao

et al. 2016

Advances in Applied Ceramics

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Oxidation resistance of carbon fibre reinforced silicon carbide composites (C/SiCs) with different coating repaired mechanical cracks was investigated. Structural integrity is critically important for the service performance of components for aerospace applications, and the coatings are reported as ideal choices to repair mechanical impact induced surface cracks. In this paper, chemical vapour deposited SiC, polysilazane (PSN) pyrolysed ceramic and slurry transformed glass coatings were introduced to investigate the oxidation resistance of repaired C/SiCs. The repair effects of various coatings were compared by weight loss and residual mechanical properties. Results showed that both SiC coated and glass coated C/SiCs exhibited preferable oxidation resistance compared with the PSN coated and uncoated specimens. Correspondingly, the former exhibited less weight loss and higher residual flexural strengths than the latter. A scanning electron microscope was employed to observe the microstructures of fracture sections, which gave an intuitive explanation for the repair effect of various coatings.

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“…Advanced aerospace applications operate in environments with high temperatures and high pressures 17–19 . Importantly, they must endure changes in the recycling temperature from high temperatures to room temperature; however, thermal shock can cause considerable damage in such conditions 20–22 .…”

Section: Introductionmentioning

confidence: 99%

“…[12][13][14][15][16] Advanced aerospace applications operate in environments with high temperatures and high pressures. [17][18][19] Importantly, they must endure changes in the recycling temperature from high temperatures to room temperature; however, thermal shock can cause considerable damage in such conditions. [20][21][22] Therefore, in order to ensure the normal use of the fiber/ceramic composites in service, it is meaningful to study the composites' high-temperature mechanical properties and thermal shock resistance when the temperatures change.…”

Section: Introductionmentioning

confidence: 99%

High‐temperature mechanical property and thermal shock resistance of Al₂O_3f/Al₂O₃ composites

Xiang

Wen

Kun

et al. 2022

Int J Applied Ceramic Tech

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Continuous alumina fiber-reinforced alumina matrix composites (Al 2 O 3f /Al 2 O 3 composites) were produced via sol-gel process, then the high-temperature mechanical property and thermal shock resistance of Al 2 O 3f /Al 2 O 3 composites were investigated. The results showed that the composites exhibited excellent high-temperature properties. The mechanical property of the composites was affected by heat treatment (prepared at 1100 • C exhibited the most desirable mechanical property). The tensile strength of the composites abruptly decreased at higher temperatures. Although the mechanical property of the composites deteriorated after the thermal shock test was conducted at high temperatures, they exhibited excellent thermal shock resistance. After 50 thermal shock tests conducted at 1300 and 1500 • C, the flexural strength of the composites was found to be 124.34 and 93.04 MPa, thus showing a decrease in strength with the increasing temperature.

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Thermal shock resistance of a 2D-C/SiC composite and its damage mechanisms

Cited by 14 publications

References 29 publications

Tensile strength degradation of a 2.5D-C/SiC composite under thermal cycles in air

Tensile strength degradation of a 2.5D-C/SiC composite under thermal cycles in air

Oxidation resistance comparison of coating repaired mechanical cracks in carbon fibre reinforced silicon carbide composite

High‐temperature mechanical property and thermal shock resistance of Al₂O_3f/Al₂O₃ composites

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Thermal shock resistance of a 2D-C/SiC composite and its damage mechanisms

Cited by 14 publications

References 29 publications

Tensile strength degradation of a 2.5D-C/SiC composite under thermal cycles in air

Tensile strength degradation of a 2.5D-C/SiC composite under thermal cycles in air

Oxidation resistance comparison of coating repaired mechanical cracks in carbon fibre reinforced silicon carbide composite

High‐temperature mechanical property and thermal shock resistance of Al2O3f/Al2O3 composites

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High‐temperature mechanical property and thermal shock resistance of Al₂O_3f/Al₂O₃ composites