The improvement in the mechanical and thermal properties of SiC/SiC composites by introducing CNTs into the PyC interface

Feng, Wei; Zhang, Litong; Liu, Yongsheng; Li, Xiaoqiang; Cheng, Laifei; Zhou, Shanlin; Bai, Hui

doi:10.1016/j.msea.2015.04.006

Cited by 34 publications

(6 citation statements)

References 31 publications

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“…20,21 Reinforcing chitosan with carbon nanotubes (CNTs) has been shown to enhance its thermo-mechanical properties. [28][29][30][31][32] Moreover, functionalized CNTs could enhance catalysis by coordinating substrate molecules through a range of non-covalent bonding interactions as well as by enhancing the accessibility of substrate molecules. CNTs are inherently inert but easily agglomerate and entangle due to strong van der Waals interactions.…”

Section: Introductionmentioning

confidence: 99%

Eco-friendly synthesis and catalytic application of chitosan/gold/carbon nanotube nanocomposite films

et al. 2016

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a Novel eco-friendly chitosan nanocomposite membranes containing gold nanoparticles and carbon nanotubes (CNTs) have been synthesized. The catalytic activity of the nanocomposites was explored using a model reduction reaction of 4nitrophenol to 4-aminophenol. Kinetic studies demonstrated that the presence of CNTs increased the rate of the reaction, mainly by reducing the induction time. TEM images confirmed the uniform distribution of gold and CNTs in the chitosan matrices. Scanning electron microscopy micrographs revealed that the inclusion of CNTs led to a more compact and less porous network structure which improved the mechanical properties of the films. Catalytically active membranes prepared from the nanocomposites could be reused at least ten times with no loss of mechanical integrity or catalytic effect, opening up the possibility of using this new, environmentally-friendly catalyst support in a continuous flow system.

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Section: Introductionmentioning

confidence: 99%

Eco-friendly synthesis and catalytic application of chitosan/gold/carbon nanotube nanocomposite films

et al. 2016

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“…Cao 等 [48] [49] 。图 5 C/C-SiC 复合材料制备工艺流程图 [48] Fig. 5 Flow diagram of preparation process of the C/C-SiC composite [48] Guo 等 [50][51] 以短切中间相沥青基碳纤维为增强体，硼化锆、碳化硅、硼化铪等陶瓷粉末为基体，利用热压工艺，分别制备了热导率为 104.7 和 93.8 W/(m• K) ) [51] 的硼化锆-碳化硅陶瓷基复合材料和硼化铪-碳化硅陶瓷基复合材料，复合材料热导率随着纤维体积分数的增加而降低。作为一种新型碳材料，中间相沥青基碳纤维以其优良的热物理性能而得到广泛应用，但其模量较高，石墨化后质地较脆 [25] ，厚度方向需借助辅助工艺进行穿刺编排，无法形成三维连续预制体。中间相沥青基碳纤维增强碳化硅陶瓷基复合材料特殊的几何结构特点，使其性能各向异性 [52] 。 2 界面优化降低界面热阻固体和界面热传输的多尺度模拟表明，声子输运主导的传热是多尺度的，声子将与不同特征尺寸的结构相互作用而发生声子散射，削弱材料的热输运能力，如点缺陷、位错、层错、孪晶边界、孔隙以及各种微结构等 [53] 。 Li 等 [54] Li 等 [56] 研究了酚醛树脂含量对化学气相渗透 (Chemical Vapor Infiltration, CVI)和反应熔渗制备碳纤维增强金刚石-碳化硅复合材料的微观结构和导热性能的影响，结果表明, 酚醛树脂含量显著影响反应熔体渗透前复合材料孔隙结构以及反应熔渗后基体的相组成和密度，酚醛树脂含量较高时，无定形碳(amorphous Carbon, a-C)的含量增加，金刚石与无定形碳的非晶态界面区域增加，界面结合较差，导致复合材料的界面热阻增加，从而降低复合材料热导率。如图 6 所示， Feng 等 [57] [57] Fig. 6 Microstructures of SiC fiber with electrodeposited CNTs and thermophysical properties of SiCf/SiC [57]…”

Section: 高导热中间相沥青基碳纤维增强碳化硅陶瓷基复合材料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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“…Increased service life could be predicted due to high σ mc . The carbon nanotubes (CNTs) were introduced into the PyC interphase of SiC/SiC via electrophoretic deposition by Feng et al [76]. The SiC/SiC with PyC interphase and CNTs-PyC interphase was signed as SiC/SiC-P and SiC/SiC-CP, respectively.…”

Section: Interface Shear Strengthmentioning

confidence: 99%

Long-term ceramic matrix composite for aeroengine

Song

Cheng

et al. 2022

J Adv Ceram

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Three strategies were proposed to prolong the service life of continuous fiber-reinforced silicon carbide ceramic matrix composite (CMC-SiC), which served as thermal-structure components of aeroengine at thermo-mechanical-oxygenic coupling environment. As for some thermal-structure components with low working stress, improving the degree of densification was crucial to prolong the service life, and the related process approaches were recited. If the thermal-structure components worked under moderate stress, the matrix cracking stress (σmc) should be improved as far as possible. The fiber preform architecture, interface shear strength, residual thermal stress, and matrix strengthening were associated with σmc in this review. Introducing self-healing components was quite significant with the appearance of matrix microcracks when CMC-SiC worked at more severe environment for hundreds of hours. The damage can be sealed by glass phase originating from the reaction between self-healing components and oxygen. The effective self-healing temperature range of different self-healing components was first summarized and distinguished. The structure, composition, and preparation process of CMC-SiC should be systematically designed and optimized to achieve long duration target.

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The improvement in the mechanical and thermal properties of SiC/SiC composites by introducing CNTs into the PyC interface

Cited by 34 publications

References 31 publications

Eco-friendly synthesis and catalytic application of chitosan/gold/carbon nanotube nanocomposite films

Eco-friendly synthesis and catalytic application of chitosan/gold/carbon nanotube nanocomposite films

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

Long-term ceramic matrix composite for aeroengine

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