Effect of initial density on thermal conductivity of new micro‐pipeline heat conduction C/SiC composites

Zhang, Yunhai; Liu, Yongsheng; Cao, Yejie; Cao, Liyang; Wang, Jing; Pan, Yu; Wang, Ning

doi:10.1111/jace.17475

Cited by 19 publications

(9 citation statements)

References 29 publications

(58 reference statements)

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“…Therefore, it avoids the formation of rough surfaces on the fiber surfaces of C pf /SiC‐5 composites. Actually, this issue has been confirmed in our previous reports 20,21 …”

Section: Resultssupporting

confidence: 68%

Optimized ablation resistance behavior and mechanism of C/SiC composites with high thermal conductive channels

et al. 2023

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Aimed to enhance the high‐temperature service performance of C/SiC composites in high‐speed aircraft thermal protection system, in this article, pitch‐based carbon fibers were used to construct high thermal conductive channels to improve the heat transfer capability of C/SiC composites. The results revealed that the as‐prepared composites equipped with 4.7 times higher thermal conductivity than that of conventional C/SiC composites. The oxyacetylene flame ablation test confirmed that the constructed high thermal conductive channels, which quickly conducted the heat flow from the ablation center area to other areas is the main reason of as‐prepared composites exhibiting a very impressive ablation resistance property. Briefly, the ablation temperature of the as‐prepared composite surfaces considerably dropped by about 300°C compared with conventional C/SiC composites, while the linear ablation rate and mass ablation rate of the composites are 1.27 μm/s and 0.61 mg/s respectively, which is superior to many recent reports, demonstrating that this article provides a simple but highly effective measure to improve the ablation resistance property of C/SiC composites.

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“…Therefore, it avoids the formation of rough surfaces on the fiber surfaces of C pf /SiC‐5 composites. Actually, this issue has been confirmed in our previous reports 20,21 …”

Section: Resultssupporting

confidence: 68%

Optimized ablation resistance behavior and mechanism of C/SiC composites with high thermal conductive channels

et al. 2023

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“…From Figure 3, the C/SiC‐M and C/SiC‐R springs show similar densities of 2.04 ± 0.162 and 1.96 ± 0.132 g/cm 3 , respectively, indicating a full filling of SiC. However, the open porosities of 15.92% and 18.60% established for C/SiC‐M and C/SiC‐R springs indicate that there are still numerous micro‐ or nanopores inside the springs, which can be attributed to the bottle‐neck effect during CVI deposition process 21,22 …”

Section: Resultsmentioning

confidence: 96%

Fiber reinforced SiC ceramic helical spring for high elasticity and large deformation at high temperature

Yang

Zhao

Chang

et al. 2021

Int J Applied Ceramic Tech

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Ceramic spring devices play a significant role in mechanical systems, developing advanced ceramic helical spring with combination of high toughness and good elasticity still remains challenging. Herein, C/SiC composite helical springs with good elastic response to temperatures were fabricated by chemical vapor infiltration method. The C/SiC springs with rectangular and circular coil structures show high densities of 2.04 ± 0.162 and 1.96 ± 0.132 g/cm3, respectively. In contrast, C/SiC spring with circular coil structure can achieve high toughness of 0.92 ± 0.004 N/mm and low energy loss of 9.13 × 10−3 J at room temperature, while also exhibit an ideal spring constant of 0.35 N/mm and low energy loss of 7.82 × 10−2 J at 1000°C, which are highly comparable with those reported traditional ceramic springs. Furthermore, through finite element simulations, the stress distribution shows that both springs generate residual stresses at different temperatures after several cycles. The more uniform stress distribution and small irreversible deformation can be responsible for the superior elasticity of C/SiC spring with circular coil structure. The proposed strategy holds promising potential for developing C/SiC composite helical spring for future elastic devices used in complex and extreme service environments.

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“…12 Microstructure of the CNTs-carbon fiber [52] Pan 等 [63] 首先采用化学气相渗透工艺制备二维碳纤维增强碳化硅复合材料，厚度方向通过激光打孔定向引入高导热碳纳米管以构建三维连续导热通路，如图 13 所示，最后经化学气相渗透增密后得图 13 定向碳纳米管-碳纤维增强碳化硅陶瓷基复合材料结构设计 [63] Fig. 13 Structure design of the Cf/SiC with aligned carbon nanotube [63] 到三维高导热碳化硅陶瓷基复合材料。改进后的复合材料的厚度热导率达到 150.42 W/(m• K)，约为改进前的 25 倍。 Zhang 等 [64] 为了提高化学气相渗透工艺制备碳纤维增强碳化硅陶瓷基复合材料的厚度热导率，利用激光加工微孔技术，使中间相沥青基碳纤维束沿厚度方向均匀排列以构建连续的导热通路。结果表明，经结构设计的复合材料热导率约为初始结构的…”

Section: 结构设计提高热导率unclassified

Highly Thermal Conductive Silicon Carbide Ceramics Matrix Composites for Thermal Management: a Review

Chen¹,

Shuxin²,

Yicong³

2023

Journal of Inorganic Materials

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Silicon carbide ceramic matrix composites have been widely used in aerospace, friction brake, fusion fields and so on, and become advanced high-temperature structural and functional composites, due to high specific strength and specific modulus, excellent ablation and oxidation resistance, high conductivity and good thermal shock resistance. This paper reviews the latest research progress in the preparation and the properties of silicon carbide matrix composites (CMC) with high thermal conductivity. Researchers have improved the thermal conductivity of silicon carbide matrix composites, including by introducing highly thermal conductive phases for reinforcing heat transport, such as diamond powders, mesophase pitch-based carbon fibers (MPCF) and so on, by optimizing the interface between pyrolytic carbon (PyC) and silicon carbide matrix for reducing interfacial thermal resistance, by heat-treating for obtaining silicon carbide matrix with higher crystallinity and better thermal conductivity, as well as designing the preform structure for establishing continuous thermal conduction path , etc. Additionally, the research interests of silicon carbide ceramic matrix composites are to explore the preparation with high efficiency and low cost by comprehensively considering the influencing factors of the performance of silicon carbide ceramic materials, and to obtain isotropic highly thermal conductive silicon carbide ceramic matrix composites with dimensional stability and excellent thermal and physical properties, by deeply analyzing the heat conduction mechanism of highly thermal conductive silicon carbide ceramic matrix composite, as well as flexibly using the structure-activity relationship between structure and performance.

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Effect of initial density on thermal conductivity of new micro‐pipeline heat conduction C/SiC composites

Cited by 19 publications

References 29 publications

Optimized ablation resistance behavior and mechanism of C/SiC composites with high thermal conductive channels

Optimized ablation resistance behavior and mechanism of C/SiC composites with high thermal conductive channels

Fiber reinforced SiC ceramic helical spring for high elasticity and large deformation at high temperature

Highly Thermal Conductive Silicon Carbide Ceramics Matrix Composites for Thermal Management: a Review

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