ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Kai Su,Yang Wang,Kexuan Hu,Xia Fang,Jie Yao,Quan Li,Jian Yang
An ultralight and high-strength SiCnw@SiC foam with highly efficient microwave absorption and heat insulation properties was successfully synthesized using the template sacrifice method and chemical vapor deposition process. The microstructure is a novel double network structure, which is formed by the coupling of the morphology-controlled SiCnw and the SiC skeleton. The introduction of SiCnw can not only provide more interface polarization and dielectric loss to the SiC foam, which greatly enhances the microwave absorption capacity of the composite foam, but also can enable it to act as an excellent radiation absorbent, which can effectively reduce the thermal conductivity of the foam, especially at high temperatures. In this study, a minimum reflection loss (RLmin) of −52.49 dB was achieved at 2.82 mm thickness with an effective absorption bandwidth of 5.6 GHz. As the length/diameter ratio of SiCnw decreases, the composite foam exhibits excellent high-temperature thermal insulation and mechanical properties. For the SiCnw@SiC foam, the thermal conductivity is only 0.304 W/mK at 1200 °C and the compressive strength reaches 1.53 MPa. This multifunctional SiCnw@SiC foam is an outstanding material, which has potential applications in microwave absorption and high-temperature heat insulation in harsh environments.
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DOI
PubMed
高影响因子
International Journal of Applied Ceramic Technology
·
2023
·Vol. 20
·期 3
·1646-1657
·
IF 2.1
Lu Fu,Shifeng Wen,Wanbo Hou,Xinhao Shi,Tao Feng,Mingde Tong
2D-C/HfC–SiC composites were prepared by a combination of precursor infiltration and pyrolysis (PIP) and chemical vapor infiltration (CVI). Creep tests were performed at 1100°C in air under different stress conditions. Unlike most, C/SiC and SiC/SiC ceramic matrix composites only underwent primary and secondary creep stages, and the C/HfC–SiC composites underwent tertiary creep stage in the creep process. The reason was that the mechanical properties of C/HfC–SiC materials prepared by PIP + CVI methods were different from those prepared by traditional methods. The microscopic morphological analysis of the sample fracture showed that the oxidation products SiO 2 and Hf–Si–O glass phases of the HfC–SiC matrix played a crack filling role in the sample during creep. In turn, it provided effective protection to the internal fibers of the sample. The creep failure of C/HfC–SiC composites in a high-temperature oxidizing atmosphere was caused by the oxidation of the fibers. The total creep process was dominated by the oxidation of carbon fibers. It is noteworthy that there was the generation of Hf x Si y O z nanowires in the samples after high-temperature creep. The analysis of the experimental data showed that the creep stress had a linear negative correlation with the creep life.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Guangyuan Yang,Xu Wang,Zhixiong Huang
To improve the oxidation resistance ability of carbon fiber (CF) in the high temperature environment, the composite electroplating method had been used to fabricate SiC-ZrO-MoSi 2 /Ni coating at the surface of CF. Both nanoparticles and Ni-matrix were plated onto CF successfully while the mechanical property of coated CF was only slightly weakened. The oxidation resistance performance of CF and the CF reinforced phenolic resin composites had been improved obviously. The microstructure of coatings was investigated by scanning electron microscope and X-ray diffraction analysis. Thermal gravimetric analysis was applied to test the anti-oxidation ability of coated CF. The mechanism of oxidation process had been discussed. It can be concluded that composite plating is an effective way to make composite coatings which can enhance the anti-oxidation ability of CF.
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DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 29
·15708-15718
·
IF 14.511
Xiaoxiao Li,Jianjun Chen,Shanliang Chen,Weijun Li,Jiahao Yang,Feng Hu,Qiliang Wei,Xinsheng Zhao,Xinfeng Zhang,Weiyou Yang
To date, many efforts have been made in exploring flexible supercapacitors (SCs) to meet the balance between electrochemical and mechanical performance, which is currently still a grand challenge. In this study, we report the rationally designed editable and flexible electrode composed of SiC nanowires and carbon nanotubes (SiC/CNTs), which couples the excellent mechanical properties of SiC nanowires and the high conductivity of CNTs. The specific capacitance of such a self-supporting electrode could be up to 8.43 F g−1 at a current density of 0.02 A g−1, which is more than 4 times that of the pure SiC analogue (i.e., 1.77 F g−1). The soft-packaged SCs deliver high flexibility, as well as robust mechanical and electrochemical properties, which could be well maintained with nearly no change in the structure and performance against various bending angles. Additionally, the flexible SCs are robust for wide-temperature operation from −30 °C to 50 °C, with capacitance retentions of 89.3% and 95.0% over 10 000 cycles at 50 °C and −30 °C, respectively. Moreover, they have long-term cycle stability for up to 14 000 cycles under progressively varied temperatures between −30 and 50 °C, presenting their promising applications as reliable energy storage devices that can operate under wide-temperature harsh conditions.
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Zhicai Zhang,Heng Yuan,Fugang Qi,Nie Zhao,Biao Zhang,Xiaoping Ouyang
A high-performance BN@F-SiC filler was prepared by depositing hydrophobic nano-SiC grafted by γ-aminopropyltriethoxysilane (KH550) and 1H,1H,2H,2H-trifluoro-noctyltriethoxysilane (FAS) on h-BN grafted by glycidoxy-propyltrimethoxysilane (KH560). A coating containing 1 wt % composite was prepared by dispersing the composite material in epoxy resin (EP), and dispersion, wear resistance, corrosion resistance, electrochemical analysis, and other tests were performed. Also, the influence of h-BN and SiC quality ratios on these properties was systematically studied. The results showed that the BN@F-SiC (2:1) composite material had the best dispersibility in EP. The water contact angle for the coating reached 118°, which indicated that the coating is hydrophobic. The friction coefficient for the BN@F-SiC (2:1)/EP coating was reduced by 89.68% compared with that for the coating without any filler. The potential dynamic polarization test and the salt spray test showed that BN@F-SiC had excellent corrosion inhibition performance. In addition, an EIS test showed that the impedance value for the BN@F-SiC (2:1)/EP coating exceeded 1010 Ω·cm2 at a frequency of 10–2 Hz (|Z|0.01Hz) after 400 h of soaking, which is nearly 103 times higher than that obtained for the EP coating without a filler. This research helps establish a foundation for future research investigating the development of wear-resistant hydrophobic and anticorrosive coatings.
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DOI
高影响因子
CORROSION SCIENCE
·
2021
·
IF 7.205
Mingde Tong,Qiangang Fu,Mingyu Liang,Tao Feng,Wanbo Hou,Jia Sun,Xinhao Shi
To optimize the impact-ablation resistance of SiC nws @PyC/HfC coating, PyC-SiC double-layer interface phase was introduced. After impacting test, the crack widths of SiC nws @PyC-SiC/HfC were much lower than that of SiC nws @PyC/HfC coating. The impact-ablation resistance of SiC nws @PyC-SiC/HfC coating was better than that of SiC nws @PyC/HfC coating. The good impact-ablation resistance SiC nws @PyC-SiC/HfC coating attributed to the two-grade pull-out reinforcement effect, self-sealing function of Hf-Si-O glass generated from oxidation of SiC nws @PyC-SiC core-shell structure and the precipitation of HfO 2 grains from Hf-Si-O glass under ablation environment.
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Da Wang,Lin Huang,Zhongnan Guo,Xue Han,Chunjun Liu,Wenjun Wang,Wenxia Yuan
High separation of photo-excited electrons and holes, leading to fast reaction rate on semiconductor surface, are determined for the hydrogen evolution by water reduction. We here provide the efficient photocatalyst of Au/SiC composite for hydrogen production, where the effect of localized surface plasmon resonance effect (LSPR) is firstly induced in the SiC-based materials for water splitting. The hydrogen production for Au/SiC is robustly increased by 30 times compared to that of pristine SiC. This high performance is attributed to the LSPR by Au nanoparticles , which results in the efficient charges separation across the Au SiC interface and accelerated water reduction rate on SiC surface by the hot electrons in conduction band of SiC. We show that the Au/SiC is an effective photocatalyst, which is capable of splitting water for hydrogen.
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DOI
高影响因子
Smart Materials and Structures
·
2022
·Vol. 32
·期 2
·025003
·
IF 4.131
Da Hu,Huilong Li,Jiabin Lu,Qiusheng Yan,Qiang Xiong,Zhanliang Huang,Fenglin Zhang
Magnetorheological elastomers (MRE) are intelligent controllable materials used as polishing pads in chemical mechanical polishing (CMP), and the magnetic particles in the MRE polishing pad are used as solid-phase catalysts for heterogeneous Fenton reactions for oxidizing single-crystal SiC surfaces, thereby helping reduce the processing difficulty and obtain high-quality surfaces. The influence of the solid-phase catalyst (Fe3O4 mass fraction, particle size) and polishing solution environment (H2O2 concentration, pH value) on the CMP heterogeneous Fenton reaction polishing single-crystal SiC were investigated. The material removal behavior of the MRE polishing pad was investigated. The results demonstrated that the solid-phase catalyst, Fe3O4, has a better superior effect than the carbonyl iron powder (CIP). The polishing material removal rate (MRR) increased and the surface roughness (Ra) decreased with an increase in the Fe3O4 mass fraction. Superior polishing results were obtained at a particle size of 0.3 μm. The higher the H2O2 concentration in the polishing solution, the greater the MRR, with lower Ra at 10% concentration. The highest MRR and lowest Ra were achieved at pH = 3 in acidic environments. During polishing, the heterogeneous Fenton reaction can significantly enhance the removal ability of polishing materials. The MRR increased by 33.4% with the heterogeneous Fenton reaction compared with those without the heterogeneous Fenton reaction, and the contribution of the heterogeneous Fenton reaction to total material removal was 25.03%. The analysis of the SiC–Abrasive–MRE polishing pad contact state revealed that the heterogeneous Fenton reaction can oxidize the SiC surface and reduce the surface hardness, increasing the indentation depth δwa of the abrasive grain into the SiC surface and exhibiting greater material removal.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Sen Liu,Shuaishuai Wu,Beibei Tang,Mao Chen,Yongqiang Chen,Hailong Wang,Rui Zhang,Bingbing Fan
High-density h-BN@SiC/ZrO 2 composites with different ZrO 2 contents were prepared by hot-pressing. The microstructure, flexural strength, thermal shock behavior, thermal expansion properties and corrosion resistance of the composites in molten steel were systematically investigated. The construction of the h-BN@SiC core-shell structure is conducive to the formation of a uniform and continuous network structure during the sintering process. This significantly improves the sintering performance of h-BN-based materials and enables the low-temperature preparation of high-density products. Moreover, the uniform distribution of SiC can effectively coordinate the thermal matching between h-BN and ZrO 2 , significantly improving the high-temperature performance of the material. During the corrosion process, the SiC network structure can effectively bind ZrO 2 and BN particles, effectively resist the erosion of high-temperature molten steel, and its erosion resistance increases with the increase of ZrO 2 content. Especially, when the ZrO 2 content reached 40%, the erosion depth of the sample was merely 160.61 μm after being immersed in static molten steel for 120 min. Moreover, the h-BN@SiC/ZrO 2 composite with 30 wt% ZrO 2 demonstrates superior comprehensive performance: It achieves a flexural strength of 159.63 MPa, retains 87.08% of its original strength after thermal shock testing, exhibits a low apparent porosity of 3.37%, and possesses an average coefficient of thermal expansion as low as 3.95 × 10 −6 /K −1 . The comprehensive properties of h-BN@SiC/ZrO 2 composites were obviously improved by SiC network structure.
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2026
·
IF 5.8
Xin Song,Zhigang Dong,Chuanqiang Li,Jiani Guo,Renke Kang,Shang Gao
Achieving appreciable material removal while preserving atomic-scale surface integrity remains challenging in CMP of 4H–SiC, largely because the oxidation pathways governing catalyst-assisted removal are still insufficiently understood. Here, a NaVO3–H2O2–SiO2 slurry was employed as a model catalytic system to clarify how H2O2 activation controls interfacial oxidation and material removal during CMP. Compared with a conventional H2O2–SiO2 slurry, the NaVO3-containing system increased the MRR from 27 to 366 nm h–1 while producing an atomically smooth surface with Sa below 0.1 nm. Combined experiments and first-principles calculations reveal that this enhancement originates from a catalyst-induced dual-pathway oxidation mechanism. In the first pathway, NaVO3 activates H2O2 to form pervanadate species, represented by [VO(O2)(OH)2]−, which directly oxidize surface Si–C bonds and initiate the formation of a SiO2-rich tribolayer. In the second pathway, reduced V(IV) intermediates further react with H2O2 through a Fenton-like route to generate hydroxyl radicals, which sustain tribolayer renewal and deepen surface oxidation. Electrochemical measurements, UV–vis spectroscopy, XPS, cross-sectional TEM, and density functional theory consistently support this mechanism. These results establish a mechanistic framework linking catalytic H2O2 activation, interfacial oxidation, tribolayer evolution, and atomic-scale surface formation in 4H–SiC CMP.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Peipei Wang,Guozheng Lv,Xiang Ji,Sheng Zhang,Yuhang Bai,Huan Luo,Yuhao Wu,Xing Zhao,Zhaoqi Hou,Peizhong Feng,Xuanru Ren
To reduce the oxidation damage during the initial active oxidation stage of ZrB 2 -SiC coating, this paper employed a slurry-brushing method to prepare a self-healing Zr-Si-B-O biomimetic glass film on the surface of the ZrB 2 -SiC coating. Furthermore, the oxidation resistance behavior of biomimetic glass films with varying ZrO 2 contents was investigated. Experimental results indicate that the Zr-Si-B-O biomimetic glass film can significantly reduce the oxidation weight gain of ZrB 2 -SiC coating. The biomimetic glass film sample with 70 wt% ZrO 2 exhibits the best oxidation protection effect. After oxidation treatment in the temperature range of 600-1600 °C, the weight gain is only 0.081 × 10 −2 g cm −2 , which is 95.35% lower than that of the sample without the biomimetic glass film; after oxidation at 1700 °C, the final protection efficiency and average carbon loss rate reach the optimal values of 99.97% and 0.34 × 10 −6 g cm −2 s −1 , respectively, and the average oxygen permeability is only 0.35%. The presence of Zr-Si-B-O biomimetic glass film can significantly reduce the oxidation activity and improve the oxidation resistance of the coating. This is attributed to the pre-introduction of a flowable and self-healing glass on the coating surface, which prevented the intense oxidation of the coating at the initial stage.
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Zhiyuan Xu,Wenhao Li,Rong Li,Yue Yang,Yingying Niu,Wenjing Luo,Yuan Fang,Pin Wu,Qiang Zhen
Aiming to improve thermal insulation and minimize heat dissipation in high-temperature industrial applications, this study fabricated mullite whisker-reinforced Al 2 O 3 -SiC-C (ASC) castables via in-situ whisker growth. Using boehmite as a pore-forming agent, AlF 3 as a catalyst, and silica sol as a binder, the composites were synthesized and characterized for mechanical properties, thermal conductivity, oxidation resistance, and slag resistance. Finite element simulations (160 μm and 10 mm models) analyzed whisker-induced pore refinement effects on heat transfer. After sintering at 1450 °C, in-situ grown mullite whiskers partitioned large pores into smaller ones, refined pore structures, and introduced abundant solid-gas interfaces. These deflected heat flux, increased path tortuosity, and elevated interfacial thermal resistance, reducing 800 °C thermal conductivity by 20.9% compared to the control sample. The material retained good mechanical strength, oxidation resistance, and slag penetration resistance. This work offers new insights for designing high-performance castables combining superior insulation with robust high-temperature performance.
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DOI
高影响因子
危险品化学品经营许可证（带存储）