CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Ping Hu,Yuan Cheng,Maosong Xie,Yu Yang,Chang Liu,Qiang Qu,Xinghong Zhang,Shanyi Du
The damage mechanism of carbon fiber and fiber-ceramic interface of C f /ZrC-SiC were investigated and revealed. The chemical reactions of C with ZrO 2 and SiO 2 impurities during the sintering resulted in the surface and grain etching of fiber. The ZrC-SiC ceramics diffused into interface to form a strong bonding under high temperature and press, leading to a failure of stress release and guiding the crack propagation direct across fiber. Both consequently impeded the fiber pull-out and bridging. By obvious contrast, the chemical etching of fiber was effectively inhibited utilizing PyC coating as transition layer, and the strong bonding of fiber with ceramic was relieved at the same time replaced by a relatively weak bonding. As a result, the fiber pull-out and fiber bridging were boosted with a longer length more than 50 µm, over 2 times of uncoated composite, accompanied with obvious crack branching and deflection, together resulting in a graceful mechanical feedback with 2.5 times of work of fracture and improved fracture toughness . This work not only revealed the microstructure forms and inherent mechanism on structure damage of carbon fiber, but also offered an effective method of protecting fiber and tailoring the interface bonding, thereby guiding the design of C f /ZrC-SiC with graceful mechanical performance.
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2016
·
IF 2.933
Rong Tu,Dingheng Zheng,Hong Cheng,Mingwei Hu,Song Zhang,Mingxu Han,Takashi Goto,Lianmeng Zhang
Halide chemical vapor deposition process was carried out for fast fabricating oriented stoichiometric β-SiC through controlling flow rate of precursors (SiCl 4 and CH 4 ). The effects of molar ratio of C and Si precursors ( R C/Si ) on composition, preferred orientation, microstructure and deposition rate ( R dep ) were investigated. The deposits transformed from silicon-rich to stoichiometric β-SiC to carbon-rich with increasing R C/Si . 〈110〉-oriented stoichiometric β-SiC with lower density of defects were obtained at R C/Si in the range of 0.86–1.00, where the maximum R dep was 883 μm/h at R C/Si = 1.00, leading to a thickness of 1.7 mm in 2 h deposition. Formation of ridge-like morphology has been discussed based on a twin plane propagation model .
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 22
·9196-9209
·
IF 4.5
Tang Zhen-xiao,Yi Mao-zhong,Zhou Yuan-ming,Liu Rui-zhi,Peng Ke
A three-dimensional orthogonal woven C/C-SiC composite was successfully prepared by high-solid-loading slurry impregnation combined with precursor infiltration and pyrolysis. The microstructure, mechanical properties and ablation behavior of the C/C-SiC composite were investigated. The slurry impregnation and the precursor infiltration and pyrolysis acted as fast filling and supplementary densification, respectively. Based on a three-dimensional orthogonal woven C/C preform, the C/C-SiC composite had excellent mechanical properties with bending strength and fracture toughness of 364.46 and 22.86 MPa·m 1/2 . The mass and linear ablation rates of the C/C-SiC composite were 3.21 mg/s and 4.93 μm/s, respectively, after ablation under an oxyacetylene flame for 300 s. The good ablation performance was attributed to the passive oxidation of SiC at high temperature and high oxygen partial pressure, and the pitting caused by SiO 2 accelerated the failure of carbon fibers.
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高影响因子
COMPOSITES PART B-ENGINEERING
·
2024
·
IF 12.7
Wenyan Huang,Jiahao Liang,Kaiqi Chen,Ying Yu,Yeqi Zhu,Junhui Li,Cheng Pan,Yipeng Guo,Siqi Lan,Rongqian Yao
With ongoing development of rocket combustion and hypersonic vehicles, urgent needs are created on thermal structures, protection and thermal insulating materials, particularly balanced enhancement of mechanical and antioxidant properties. Herein, we propose a design strategy to construct continuous in-situ formed SiOC nanowires (SiOCnws)-toughened self-healing SiO x coatings into porous SiC(rGO) PDCs. The key production technique is re-pyrolyzing coassembled flexible precursors/SiC(rGO) p /graphite blends, followed by decarbonization and silica sol impregnation-sintering (SIS) process. Well-distributed hierarchical pores are built to heighten thermal insulation properties by the integrated decarburization of graphite coupled with free carbon. High-yield SiOCnws, with high surface activity, are first cultivated via graphite-assisted vapor-solid (VS) mechanism without transition metal catalysts. They interconnect to form intricate 3D meshwork by graphite-assisted melt-spinning and have good compatibility with ceramic matrix and SiO x coatings by carbothermal reaction. Hierarchically porous SiOCnws/SiC(rGO) 40 % PDCs after once SIS exhibit favorable thermal conductivity of 0.27 W‧m −1 ‧K −1 and exceptional high robustness (compressive strength: 39.02 MPa, hardness: 10.27 GPa). Such composites display low reflection loss of −48.14 dB at 11.22 GHz and even good structural stability at about 1300 °C as burned by a butane blowtorch for 3600 s, shedding light on competitive components for uses in thermal protection fields.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Biao Li,Xiang Chen,Yuan Lai,Kui Shi,Dong Huang,Huafeng Quan,Shipeng Zhu,Tongqi Li,Jinshui Liu,Chong Ye
Porous thermal insulators are vital for aerospace and energy systems, yet achieving a balance between lightweight architecture, mechanical robustness, and stability under oxidizing high-temperature conditions remains a significant challenge. Here, a biomimetic strategy was developed to construct hollow silicon carbide fibers (SiC-HF) using carbon fiber felt as a template. Continuous SiC coatings were formed in situ and the carbon core was selectively removed, yielding an ultralight porous network with a density of 0.033 mg·cm −3 and a porosity of 97.6 %. The hierarchical hollow-fiber architecture imparted exceptional elasticity to the SiC-HF, enabling recovery after compressions of up to 40 % strain and preserving structural integrity across both cryogenic and high-temperature conditions. In addition, the multiscale pore system suppressed gas-phase and solid-phase conduction while attenuating radiative transfer, resulting in a low thermal conductivity of 0.0692 W·m −1 ·K −1 at room temperature and stable insulation at elevated temperatures. Moreover, the SiC-HF exhibits strong oxidation resistance, showing only 24.65 % mass change at 1300 °C for 2 h. This work offers a robust pathway to oxidation-resistant porous ceramics and delivers valuable design insights for developing next-generation thermal protection materials suited to extreme environments.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·Vol. 51
·期 11
·14746-14754
·
IF 5.6
Boyu Chen,Lijuan Niu,Jianlong Chai,Zhiyuan Bai,Jiayin Zhang,Di Liu,Xuefeng Lu,Yabin Zhu
β-SiC ceramics were prepared by spark plasma sintering at 2200 °C with Y 2 O 3 , MgO , and CeO 2 as sintering additives. Al 2 O 3 was doped based on the above oxides to form a two-component sintering additive to carry out a comparative analysis. The effects of these additives on the microstructure, bulk density, and Vickers hardness of β-SiC were systematically studied. The mechanical properties of the single-component samples were superior to those of the two-component samples. Notably, the single-component sample with Y 2 O 3 , addition exhibited the highest density (98.69 %) and hardness (27.1 GPa), which can be attributed to the appropriate growth of the grains in the single-component sample with Y 2 O 3 . Additionally, the principle of lattice reduction in SiC ceramics was explored using first-principle calculations, further highlighting the advantage of Y 2 O 3 as a single additive for the high-temperature sintering of SiC ceramics.
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DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·Vol. 46
·期 6
·118062
·
IF 6.2
Shaobo Yang,Chun Guo,Yuan Wang,Jiali Li,Yujie Chen,Sijie Kou,Juanli Deng,Bo Chen,Shangwu Fan
A glass-ceramic derived from a high-yttrium aluminosilicate (HYAS) composition was developed for joining silicon carbide fiber-reinforced silicon carbide (SiC f /SiC) composites. The as-prepared powder exhibited a high softening point (∼1396 °C), good wettability, and a thermal expansion coefficient (3.79 × 10 −6 /K) well matched to that of SiC f /SiC. Dense joints were fabricated at 1420 °C for 60 min, achieving an average lap shear strength of ∼54 ± 2 MPa. The joining mechanism involved crystallization-assisted sintering, liquid-phase densification, and atomic-scale interdiffusion without interfacial reaction layer formation. Hydrothermal corrosion was evaluated in water containing ∼8 ppm dissolved oxygen, approximately three orders of magnitude higher than typical pressurized water reactor (PWR) conditions, to simulate long-term degradation. After 15 days, the joints retained a lap hear strength of ∼37 ± 2 MPa, with corrosion confined to the residual glass phase while interfacial integrity remained intact, demonstrating the promising durability of HYAS glass-ceramic as a durable sealant for SiC f /SiC composites under accelerated hydrothermal conditions.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Jiangtao Li,Yunjia Xue,Xueying Zhang,Fan Zhang,Wenhao Hu,Jiachen Liu
The SiC-ZrO 2 coating was prepared on the surface of aluminosilicate ceramic fiber fabric (ASFF) to enhance the radiation heat dissipation. However, the Si-sol in the SiC-ZrO 2 coating caused the fiber to adhere together at high temperatures. The brittle fracture of the ASFF led to a deterioration in its temperature resistance. In this paper, an Al 2 O 3 interface was prepared on the surface of ASFF by spraying alumina precursor. The Al 2 O 3 interface prepared by 3.0 wt% alumina precursor was uniformly covered on the fiber surface. The flexibility of ASFF/Al 2 O 3 /SiC-ZrO 2 was maintained after static oxidation at 1300 °C for 1 h. The tensile strength of ASFF/Al 2 O 3 /SiC-ZrO 2 at 1200 °C were increased from 5 to 7 MPa to 21.35 ± 2.58 MPa. The Al 2 O 3 interface not only limited the direct contact between Si-gel and fiber, but also reacted with Si-gel to produce mullite at high temperature. The problem of fiber adhesion caused by Si-sol in ASFF matrix was solved. Additionally, the SiC-ZrO 2 coating reduced the surface temperature of ASFF rom 1700 °C–1300 °C. Combining the radiation performance of SiC-ZrO 2 coating and the isolation effect of the Al 2 O 3 interface, ASFF/Al 2 O 3 /SiC-ZrO 2 was able to operate continuously for 300 s under the 1700 °C butane-oxygen flame heating condition.
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DOI
高影响因子
CARBON
·
2013
·
IF 5.868
Xingyun Li,Xiulian Pan,Yonghua Zhou,Xinhe Bao
A C–SiC composite with a thin layer of carbon surrounding the SiC substrate has been produced by the reaction of SiC with CCl 4 . The pore structures , graphitization levels and the chemical compositions can be finely modulated by the synthesis temperature, and atmosphere. A higher synthesis temperature accelerates the chlorination rate, increases the thickness of carbon layers and enhances their graphitization. Mesopores can be generated in C–SiC composites in comparison to predominant micropores in commercial activated carbon (AC), particularly in the presence of reactive atmosphere such as CO 2 and NH 3 . Furthermore, with cofeeding of NH 3 with CCl 4 , N heteroatoms can be incorporated into the carbon layer and the N content varies in a range of 4.7–9.5 at.%, depending on the synthesis conditions. Both increased fraction of mesopores and their sizes, as well as N doping facilitate significantly hydrogenation of 4-carboxybenzaldehyde. The activity of Pd catalyst supported on N-doped C–SiC is five times that on commercially used AC under the same conditions.
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DOI
高影响因子
International Journal of Applied Ceramic Technology
·
2019
·Vol. 17
·期 3
·874-885
·
IF 1.074
Zilong Lu,Bixiong Bie,Aimin Pang,Wei Li,Jianling Yue,Xiaozhong Huang,Haitang Yang
SiC f /SiC composites that possess PyC or BN interface layers were fabricated and then oxidized in moist air at 1000, 1200, 1400, and 1600°C. High-resolution CT was used for capturing 3D images and quantifying the SiC phase, mesophase, and voids. The oxidation behavior and microstructural evolution of SiC f /SiC with PyC or BN interface are discussed in this study. The microstructure of the SiC f /SiC with a PyC layer was seriously damaged in moist air at high temperature, whereas the BN interface layer enhanced the oxidation resistance of the SiC f /SiC. These results are also confirmed by using XRD, oxidation mass gain, tensile testing, and SEM measurements. The results of the oxidation behavior and microstructural evolution for SiC f /SiC oxidized in dry air are also compared with the results of this study. Comparing the SiC f /SiC with a PyC interface layer, the composite with a BN interface layer oxidized in moist air exhibits a high void growth rate and a low SiO 2 grain growth rate from 1000 to 1600°C. This work will provide guidance for predicting the service life of SiC f /SiC for multiscale damage rate models of materials at a local scale and will also provide guidance on the life service design of SiC f /SiC materials.
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高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Lanwei Li,Wenya Zhai,Chao Wang,Shuyao Li,Panpan Peng,Pengya Fan,Gui Yang
With the development and application of thermoelectric (TE) devices, it requires not only high-performance of TE materials but also high mechanical properties. Here, we report a medium-temperature liquid material, AgCuTe, with high mechanical properties. The results demonstrate that AgCuTe possesses a multiphase structure characterized by abundant grain boundaries, resulting in reduced lattice thermal conductivity and inherently high mechanical strength. Furthermore, nano-SiC was alloyed into the AgCuTe material to further improve its mechanical and TE properties. Nano-SiC exhibited a button-like distribution within the grain boundaries, introducing a pinning effect that significantly elevated the Vickers hardness of the samples. Additionally, nano-SiC induced strong lattice distortion energy in the vicinity, which promotes Ag/Cu ions to escape from the lattice and enhances the liquid-like behavior of Ag/Cu ions. Finally, these enhancements led to a 21% improvement in the mechanical properties and a 40% improvement in the TE properties for AgCuTe. Notably, AgCuTe achieved its peak TE performance, with a latest peak ZT value of 1.32 at 723 K. This research expands the potential applications of AgCuTe.
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高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 5.6
Jingjing Liao,Haoqiang Wang,Yongjian Li,Xuewen Wu,Xian Tang,Dou Zhang
Significant challenges have limited the fabrication of complex SiC structures with high strengths for direct ink writing. Therefore, this study developed a novel SiC ink using Al 2 O 3 and Y 2 O 3 as sintering additives to prepare high-strength, complex SiC structures via a combination of direct ink writing and liquid-phase sintering. The effects of Al 2 O 3 + Y 2 O 3 addition on rheological behaviours of the SiC inks and the resultant microstructures and mechanical properties were systematically investigated. The results revealed that a 45.0 vol % SiC ink with 4.1 wt% Al 2 O 3 + Y 2 O 3 exhibited desirable rheological properties, including a low viscosity of 5.73 Pa s at 50 s −1 and shear yield stress of 325.23 Pa for depositing regulated and precise structures. Using this ink, various complex SiC ceramics were successfully fabricated, achieving a maximum densification of 89.5 ± 0.4 %, bending strength of 134.7 ± 8.3 MPa, and Vickers hardness of 15.66 ± 1.50 GPa after sintering at 1950 °C for 1 h. Conversely, the 45.0 vol% SiC ink with 7.4 wt% Al 2 O 3 + Y 2 O 3 caused nozzle blockages and produced irregularly layered structures with defects. This study offers a new method for the direct ink writing of complex, high-strength SiC ceramics, showing significant potential for applications in various fields.
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高影响因子
危险品化学品经营许可证（带存储）