MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
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2025
·
IF 7
Ming Yang,Zhenyu Wei,Ruifen Guo,Tong Che,Ping Shen
The performance comparison between uniformly dispersed and bioinspired architectures in metal matrix composites has long been limited by the absence of rigorously controlled experimental validation. To address this gap, this study employed a carbon fiber-assisted gelcasting method to fabricate crack-free, low-volume-fraction (31.2 vol.%) uniform SiC preforms. They were compared against laminated SiC preforms (∼30 vol.%) prepared via freeze casting, with both architectures densified by aluminum infiltration under identical conditions. The results demonstrate that the laminated structure achieves a remarkable strength–toughness synergy, with its flexural strength and fracture toughness enhanced by 7.3% and 18.2%, respectively, compared with the uniform structure. This improvement is attributed to a transition in the toughening mechanism from an intrinsic to an extrinsic mechanism dominated by crack bridging, highlighting that spatial configuration constitutes a critical performance-regulating dimension beyond traditional compositional design, and offering a new paradigm for the development of high-performance composites.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Zhangwen Wang,Chao Wu,Anzhe Wang,Huaguan Li,Chenghai Xu,Guodong Fang
s Continuous carbon fiber-toughened ZrB 2 -SiC ceramics matrix composites (C f /ZrB 2 -SiC), which combine the high strength of carbon fiber needled preforms with the ultra-high-temperature ablation resistance of ZrB 2 -SiC ceramics, exhibit complex responses in the extreme thermo-mechanical-oxygen coupling environments. The fracture behavior and damage mechanisms of the lightweight C f /ZrB 2 -SiC composites were investigated by the thermo-mechanical-oxygen coupling tensile tests. The residual strength after oxidation was found to be synergistically reduced by temperature and pre-tensile load, with a linear negative correlation between pre-tensile stress and residual strength. The needled fibers improve the interlaminar toughness but introduce the localized porosity that accelerates oxygen diffusion and oxidative damage. Under air oxidation at 1100°C, pre-tensile stress reopens self-healing microcracks, transforming the oxidation kinetics from diffusion-controlled to reaction-controlled regimes. This study can provide an experimental basis and practical guidance for the design of needled fiber preforms to balance oxidation resistance and mechanical properties.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Bin Yan,Zhi Chen,Yuting Wang,Jiaying Liu,Ruiyuan Wang,Xuankun Li,Minfeng Fang,Guanghui Li,Pinhua Rao,Yang Liu
Silicon carbide (SiC) ceramic membranes are highly valued in separation technologies for their outstanding thermal stability, chemical resistance, and durability. However, achieving precise pore size control remains a major challenge. In this work, we introduce polycarbosilane (PCS) as a pre-ceramic precursor and employ a simple dip coating-crosslinking-pyrolysis route to finely engineer SiC membrane pores. We systematically investigate the effects of substrate humidity, PCS coating concentration, oxidative crosslinking, and pyrolysis temperature on membrane morphology, pore size distribution, permeate flux, and nanoparticle rejection. Under optimized conditions (5 wt % PCS and 1000 °C pyrolysis), the mean pore diameter decreases by 20 %, and crosslinking enhances particle rejection by 31.8 %. The modified membranes also exhibit exceptional corrosion resistance, with less than 0.25 % mass loss after 30 days in pH 1 and pH 13 solutions. This approach establishes a clear humidity-loading-pore relationship and offers a scalable, controllable strategy for ceramic membrane pore engineering, paving the way for applications under harsh water treatment and chemical separation conditions.
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DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2020
·Vol. 60
·期 5
·1044-1053
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IF 1.917
Yang Yang,Jiming Gao,Ting Lei,Jun Yang,Jin Wang,Jie Liu
Polyimide (PI) composites with mixed fillers of BN flakes and SiC whiskers exhibit enhanced thermal conductivity and mechanical properties. In order to improve dispersion and interaction of these mixed fillers within the PI matrix, BN flakes were modified by a titanate coupling agent while SiC whiskers were oxidized at 750°C for 60 minutes to produce SiC @SiO 2 followed by silane coupling agent modification. PI composites reached a maximum thermal conductivity of 0.95 W/m K at volume fraction of mixed fillers of 27.6 vol% when the weight ratio of BN flakes to SiC @SiO 2 whiskers was 1:4. The enhanced thermal conductivity is likely attributed to the formation of heat conductive networks constructed by BN flakes and SiC @SiO 2 whiskers and the improved interfacial affinity between fillers and matrix. The optimized Nielsen-mold confirms the distribution and morphology of fillers affect the thermal conductivity of PI composites. In addition, SiC whiskers enhanced the mechanical property of PI composites and the influence of fillers on the mechanical property was further elaborated.
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DOI
高影响因子
POWDER TECHNOLOGY
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2020
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IF 4.142
Shengqin Gong,Xiaomin Cheng,Yuanyuan Li,Xiuli Wang,Yanping Wang,Hao Zhong
In this study, a series of 1-octadecanol (OD) composite phase change materials (PCMs) with stable shape were prepared by adding nano‑silicon carbide (SiC), expanded graphite (EG) and SiC/EG composite respectively. The thermal conductivity of OD/SiC, OD/EG and OD/SiC/EG were 0.432, 0.607 and 0.996 W·m −1 ·K −1 respectively when the mass fraction was all 5 wt%. The results indicated that among the above three additives, SiC/EG composite had the best enhancement effect on the thermal conductivity of organic PCMs, while the thermal conductivity of OD/SiC/EG composite with 9 wt% SiC/EG addition was 1.674 W·m −1 ·K −1 , which was more than 4 times that of pure OD. SEM results showed that SiC distributed uniformly on the surface of EG without obvious agglomeration. SiC/EG could replace EG as a new excellent thermal conductivity reinforcement. The phase transition temperature and phase transition enthalpy of OD/SiC/EG composite were 58.6 °C and 210 J/g, respectively, which also processed sufficient thermal stability. The prepared OD/SiC/EG composite heat storage materials had both high thermal conductivity and large storage energy density , which can meet the demands of low temperature heat storage fields, such as thermal control of electronic components, building materials and solar energy systems.
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高影响因子
Journal of Materials Research and Technology-JMR&T
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2025
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IF 6.6
Chunxue Zheng,Jie Yu,Xinyang Li,Jingbo Duan,Zhulin Huang,Ming Li,Xiaoye Hu,Yue Li
High-temperature thermal-insulation aerogels with high mechanical strength and well oxidation resistance are critical for the thermal protect system (TPS) of aerospace vehicles. However, it is still challenging to achieve large-scale preparation of aerogels that integrate the above functions through a simple method. In this work, carbon fiber (CF) felts are introduced as a reinforcement and template to prepare silicon carbide nanowire (SiC nw ) aerogel composites through a simple in-situ growth strategy. The high-strength CF as the skeleton endows high mechanical strength, and the in-situ grown SiC nw aerogels lead to good thermal insulation of the composites. More importantly, a dense SiC shell was also formed and tightly coated on the surface of CF (CF@SiC) during the in-situ growth process, which effectively protects the CF from oxidation, thus enhancing the high temperature oxidation resistance of the composites. As a result, the optimal CF@SiC/SiC nw aerogel composites possess a low thermal conductivity of only 0.056 W m −1 K −1 at room temperature. The back temperature of the 9 mm thick composites is only 151.9 °C after exposure to a butane flame at 1220 °C for 300 s, and it still maintains considerable thermal insulation and mechanical properties after the ablation. In addition, the machinability of the CF felts makes it easy to prepare the composites in various shapes and larger sizes. This work provides a simple and scalable strategy to synthesize reliable SiC-based aerogel composites for high-temperature thermal insulation applied in extreme environments.
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高影响因子
Advanced Science
·
2025
·
IF 14.1
Zheng Zhang,Cui Liu,Nian Li,Wei Guo,Ying Li,Pengzhan Yang,Shudong Zhang,Zhenyang Wang
Here electrospinning and freeze-drying techniques are combined to fabricate an anisotropic SiC@SiO 2 ceramic fiber aerogels (A-SiC@SiO 2 -FAs). The anisotropic structure of the A-SiC@SiO 2 -FAs features aligned layers stacking layer-by-layer with the same direction and highly oriented 1D fibers inside each layer. The A-SiC@SiO 2 -FAs exhibit anisotropic thermal properties with an extremely low thermal conductivity of 0.018 W m −1 K −1 in the transverse direction (perpendicular to the SiC@SiO 2 nanofibers) and ≈5 times higher thermal conductivity of 0.0914 W m −1 K −1 in the axial direction due to the highly oriented SiC@SiO 2 nanofibers. The anisotropy factor of the A-SiC@SiO 2 -FAs is as high as 5.08, which exceeds most of the currently reported thermal insulation materials with anisotropic structural design, such as anisotropic wood aerogels, biaxially anisotropic PI/BC aerogels and anisotropic MXene foam, etc. The A-SiC@SiO 2 -FAs also have excellent thermal stability, maintaining structural integrity in oxidative environments at temperatures up to 1300 ° C. Moreover, these structurally distinct A-SiC@SiO 2 -FAs result in superior elastic deformation with a radial recoverable strain exceeding 60% and an axial specific modulus of 5.72 kN m kg −1 . These findings emphasize the potential of SiC nanofiber aerogels in extreme thermal environments and provide valuable insights for designing anisotropic insulation materials.
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Siqi Lan,Zhenguo Huang,Wenyan Huang,Yeqi Zhu,Jiahua Zhan,Shengjian Mao,Zhichao Xue,Rongqian Yao
Demand for SiC-based polymer-derived ceramics (PDCs) employed as hypersonic vehicle components with light weight, high strength, excellent high-temperature/ablation resistance is increasingly urgent. Herein, bulk SiC(Hf, rGO) nanocomposite PDCs were fabricated via re-pyrolyzing ball-milling blends of unique SiC(Hf, rGO) p /polyhafniumcarbosilane-vinyltriethoxysilane-graphene oxide (PHVG). Highly cross-linked PHVG can effectively optimize compact formability and improve ceramic yield. In-situ formed HfO 2 embedded in ceramic network toughens microstructure, while interfacial HfOSi increases structure disorder to improve high-temperature properties. As demonstrated, SiC(Hf, rGO) modified by 3 wt.% Hf and re-pyrolyzed at 1300 °C possess good mechanical performances including hardness (5.83 GPa), fracture toughness (4.29 MPa·m 1/2 ), compressive strength (181.83 MPa) and flexural strength (46.55 MPa). More interestingly, self-healing HfO 2 (HfSiO 4 )/SiO 2 protective layer emerging during 20 min surface ablation test at 1300 °C, timely covers defects and avoids destructive structure, thus retains stable structure and mechanical properties of specimens. Such nanocomposites can promote uses in thermal protection systems (TPS) for hypersonic vehicles against extreme high-temperature environments.
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DOI
高影响因子
CARBON
·
2025
·
IF 11.6
Xiaoxiao Yu,Yu Zhang,Xiaolei Nie,Wei Song,Lisha Chen,Haotian Li,Wanting Zhu,Danqi He,Mingrui Liu,Ping Wei,Wenyu Zhao,Qingjie Zhang
High infrared emissivity and excellent thermal conduction capability are crucial for the heat dissipation performance of heat dissipation coatings, which are applicable in the thermal management of modern electronic components. Herein, SiC nanowires/Edge-oxidized graphene/polyvinylidene fluoride hexafluoropropylene (SiC NWs/EOG/PVDF-HFP) composite coatings with three-dimensional thermal conductivity network structure were successfully prepared by the in-situ growth of SiC NWs between EOG layers through high-temperature carbothermal reduction reaction. The out-of-plane thermal diffusivity of the SiC NWs/EOG/PVDF-HFP composite coating was increased by 27 %, as compared with that of the EOG/PVDF-HFP coating, which was originating from the enhanced phonon conduction in the vertical direction by the in-situ growth of SiC NWs. The stacking faults and twin crystals generated by SiC NWs, the structural defects introduced by EOG, and the multi-scale surfaces and interfaces introduced by EOG and SiC NWs have jointly improved the infrared emissivity, enabling the SiC NWs/EOG/PVDF-HFP composite coating achieved an emissivity of 0.92. The copper plate coated with SiC NWs/EOG/PVDF-HFP coating achieved a temperature drop benefit of 9.3 °C, increasing by 126 %, 93 % and 78 %, respectively, as compared with that of the copper plate coated with EOG/PVDF-HFP coating, the copper plate coated with mechanically compounded SiC/EOG/PVDF-HFP coating, and the copper plate coated with mechanically compounded SiC NWs-EOG/PVDF-HFP coating. These findings highlight the great potential of the SiC NWs/EOG/PVDF-HFP composite coatings for application in the thermal management of electronic devices.
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高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·
IF 3.8
Shuo Yan,Yuhong Chen,Ziqiang Yin,Binwei Huang,Quanxing Ren,Tihao Cao,Xuxin Ping,Ruibin Liu,Zhengren Huang,Qing Huang,Yinsheng Li
SiC ceramics were fabricated by spark plasma sintering of β-SiC powder with various rare-earth (RE = La, Gd, Yb, Sc) oxides and magnesia additives. The phase compositions, microstructures, lattice oxygen contents, and thermal conductivities were systematically investigated. A decrease in the cationic radius of rare-earth element resulted in an increased cationic field strength. This enhanced attraction to oxygen anion led to higher viscosity and improved high-temperature stability of the intergranular RE-Mg-Si-O liquid phase. After sintering at 1850°C, influenced by liquid-phase viscosity, the degree of β→α phase transformation in SiC and the grain size decreased with decreasing cationic radius of rare-earth element. After sintering at 2050°C, the liquid-phase viscosity significantly decreased, but volatilization became pronounced. The extent of β→α phase transformation and the grain size were affected by both liquid-phase viscosity and volatility. Larger grain size and higher affinity of rare-earth cations for oxygen anions contributed to reduce lattice oxygen content. The thermal conductivities of the SiC ceramics ranged from 192 to 229 W/mK. Notably, the SiC ceramic with Yb 2 O 3 -MgO additives exhibited the largest grain size, the lowest lattice oxygen content, and the elimination of β/α heterophase boundaries, thereby achieving the highest thermal conductivity of 229 W/mK.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Wenyan Huang,Zhichao Xue,Lingjie Li,Shengjian Mao,Yufeng Wang,Yeqi Zhu,Tao Luo,Qianwen Tao,Rongqian Yao
Strengthening interface bonding for superior mechanical/ablation performances of SiC-based aerospace vehicle components remains a major challenge. Attractively, polycarbosilane-vinyltriethoxysilane-graphene oxide with addition of TiN/B (PVG(TiN, B)) were successfully synthesized for the first time. An ingenious route via re-pyrolyzing ball-milling-induced SiC(rGO, TiB 2 ) p fillers/PVG(TiN, B) precursors blends was introduced to prepare lightweight SiC(rGO, TiB 2 ) composite polymer-derived ceramics (PDCs). Interestingly, both SiC(rGO, TiB 2 ) p and PVG(TiN, B) pyrolysis products, composed of β-SiC/SiO x C y /C free (rGO, TiB 2 ), are tightly coupled by each other owing to plentiful Si-dangling bonds. In-situ formed intergranular TiB 2 /B 4 C, well compatible with amorphous ceramic network, can prevent β-SiC grain growth, strengthen interface bonding, and even hinder further crack propagation along the grain boundaries. Particularly, samples re-pyrolyzed at 1300 °C possess unique combination of good hardness (5.44 GPa), excellent fracture toughness (4.70 MPa·m 1/2 ), high flexural strength (41.90 MPa) and outstanding compressive strength (126.33 MPa). Improved high-temperature and ablation resistance gives them distinct advantages of interlocked microstructure under exposure of butane flame. As demonstrated, SiC(rGO, TiB 2 ) composite PDCs were developed into porous ceramics with good thermal insulation , focusing on manufacturing large-size bulk PDCs for thermal protection system of hypersonic vehicles.
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2016
·
IF 2.933
Xiaowu Chen,Shaoming Dong,Yanmei Kan,Xihai Jin,Haijun Zhou,Dewei Ni,Dengke Wang
Three-dimensional C f /SiC-ZrC-ZrB 2 composites were fabricated by reactive melt infiltration of ZrSi 2 alloys into porous C f /B 4 C-C preforms prepared through a sol-gel process. The influence of pore structure of the C f /B 4 C-C preforms on microstructure and mechanical performances of the C f /SiC-ZrC-ZrB 2 composites was studied. It was found that the microstructure and mechanical performances of the composites showed a strong dependence on the pore structure of the preforms. Residual ZrSi 2 content in the composites was significantly reduced with the decreases in the porosity and pore size of the C f /B 4 C-C preforms. At the same time, fiber erosion in the composites was also gradually mitigated, which led to a significant improvement in the fracture behaviors of the composite, as failure mode of the composites changed from brittle to pseudo-plastic. When the porosity of the preforms decreased from 53.7% to 31.3%, the flexural strength of the composites increased from 53 MPa to 184 MPa.
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DOI
高影响因子
危险品化学品经营许可证（带存储）