Materials Today Chemistry
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2024
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IF 6.7
Fuping Li,Wei Zheng,Yue Wang,Wei Dang,Zhuoli Xu,Xinyuan Zhang,Kang Zhao,Zhenyi Yuan,Yufei Tang
Polycarbosilane-derived (PCS-derived) coating containing SiC fillers with enhanced adhesive strength and corrosion resistance were fabricated on Q235 steel by a simple method of dip coating . The effects of content and particle size of SiC fillers on the phase composition, surface morphology , adhesive strength and corrosion resistance of PCS-derived coatings were studied. Addition of SiC fillers could reduce the microcrack width on the coating surface . The microcrack width decreases with the decrease in particle size of SiC fillers. Addition of 2.5 wt% SiC fillers with particle size of 30 nm could make the coating surface crack-free. Different from particle size, the effect of filler content on the microcracks has a moderate value which is corresponding to lower microcrack width. In addition to the microcracks, SiC filler content and particle size have significant effects on the adhesive strength between coatings and substrates. The higher adhesive strength is 319.1 MPa for coatings fabricated with a particle size of 500 nm and a content of 10 wt%. SiC fillers can improve the corrosion resistance of the PCS-derived coatings. In comparison with particle size of filler, filler content has a greater effect on the corrosion resistance of the coatings. The corrosion mechanism was analyzed. Appropriate content of fillers reduce the microcrack width and further improve the corrosion resistance of the coatings.
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高影响因子
CERAMICS INTERNATIONAL
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2024
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IF 5.1
Yang Liu,Jia-Ji Liang,Wei-Ming Guo,Chao Chang,Xiao-Ming Duan,De-Chang Jia,Hua-Tay Lin
High-temperature thermal stability plays a crucial role in the structural application of pressureless liquid-phase sintered SiC (PLS-SiC) ceramics. In this paper, a PLS-SiC ceramic processed with CeO 2 –Al 2 O 3 as sintering additives with excellent high-temperature thermal stability was achieved by incorporating (Hf, Zr, Ta, Nb, Ti)B 2 (HEB) particles. Results showed that PLS-SiC ceramics with HEB-free underwent a structural change from dense to porous microstructure after annealing at 1800 °C/1 h. Conversely, PLS-SiC ceramics with the addition of 10 vol% HEB exhibited excellent thermal stability, as evidenced by the retention of their dense microstructure after exposure to annealing at 1800 °C/1 h. The possible primary reasons for this significantly different response to the thermal stability could be probably attributed to fact that HEB reacted with CeAlO 3 and SiC to form solid-phase products, subsequently inhibiting the formation of gas-phase products after decomposition of CeAlO 3 alone in a high-temperature vacuum environment. In addition, the formation of a compact protective outer layer containing Hf–Ta containing diboride in PLS-SiC ceramics during the annealing process could effectively hinder the volatilization of volatile substances at a high temperature.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
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IF 5.6
Linying Huang,Hui Wang,Qin Ouyang,Gaoming Mo,Jing Huang,Yueqing Zheng,Qing Huang
Polymer-derived silicon carbide (SiC) fibers are excellent structural and functional materials for extreme environments. However, the low efficiency of the curing process and the inferior stability of the amorphous SiC x O y phase have limited their large-scale preparation and widespread application. In this study, phenylboronic acid (PBA)-modified polyaluminocarbosilane (PACS) electrospun fibers were cured efficiently via an electron beam irradiation oxidation technique, and then converted into highly crystalline SiC fibers with low oxygen content by high-temperature sintering. The combination of irradiation oxidation and subsequent annealing treatment facilitated the effective, rapid, and sufficient curing of PACS fibers. Notably, boron played a significant role in inhibiting the growth of SiC grains and promoting the graphitization of free carbon. The SiC fibers obtained from PBA-modified PACS through irradiation oxidation curing exhibited superior electrical conductivity and microwave absorption performance, achieving a minimal reflection loss (RL) of −41.8 dB at 12 GHz with a thickness of 1.5 mm. This work provides an effective method for preparing SiC fibers with tunable carbon structures and enhanced microwave absorption properties, thereby paving a way for expanding their applications.
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高影响因子
CERAMICS INTERNATIONAL
·
2024
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IF 5.1
Wei Ding,Pengjian Lu,Qingfang Xu,Chitengfei Zhang,Rong Tu,Song Zhang
In the integrated circuit industry, heat is transferred through the contact between wafers and the chemical vapor deposited (CVD) 3C–SiC wafer susceptor . Understanding the out-plane thermal conductivity of CVD 3C–SiC is crucial in this context. The influence of grain size and grain boundary characteristics on out-plane thermal conductivity for <111>-oriented CVD 3C–SiC was discussed in this study. The out-plane thermal conductivity sharply decreases from 146.4 W/m⸱K to 122.3 W/m⸱K when the grain size approaches 11.04 μm. This paper suggests that the significant accumulation of dislocations at high-angle grain boundaries is the primary cause of this phenomenon. The substantial lattice strain impedes phonon transfer between grain boundaries, reducing overall phonon mobility. These findings suggest that manipulating the grain boundary angle is an effective means to fine-tune heat transfer in <111>-oriented CVD 3C–SiC.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Ying Zhang,Feng Han,Dong Zou
The gas permeance and particle removal efficiency of silicon carbide (SiC) membranes are the most important performance indicators for high-temperature gas filtration. The rational design of SiC membrane microstructure has a positive impact on the improvement of performance indicators. This work prepared SiC membranes modified by in situ grown mullite whiskers, optimized their preparation conditions and investigated their performance improvement. The membrane suspension composition and sintering temperature were optimized using Taguchi’s method and gas permeance as the target. The thickness of the membrane was regulated by adjusting the spraying cycles and solid content in membrane suspension. Results showed that best membrane performance was obtained when the content of sintering aids, MoO 3, and AlF 3 ·3H 2 O were 8, 12, and 12 wt%, respectively; the solid concentration in membrane suspension was 30 wt%; the number of spraying cycles was 2, and the temperature was 1350 °C. The resulting membrane obtained a pore size of 5.8 µm and the Darcy's permeability coefficient k was 8.58 × 10 −12 m 2 . It also had good interfacial adhesion and thermal shock and corrosion resistances. The membrane achieved a PM 2.5 removal rate of more than 99.9 % at room temperature and high temperatures (100 °C–400 °C) with a low pressure drop below 1.4 kPa. Overall, the SiC ceramic membranes are prospective candidates for dust-laden gas filtration at high temperatures.
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Materials Today Communications
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2024
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IF 3.7
Hao Chen,Jianjun Chen,Yongwei Lou,Mingming Zhu,Jinxia Li,Jiahao Yang,Hussain Zaheer
SiC nanowire paper composed of SiC nanowires, possesses extensive industrial applications owing to its remarkable properties of low thermal conductivity , fire resistance and foldability. In this work, centimeter-scale SiC nanowires were successfully synthesized via a sol-gel and carbothermal reduction reaction. Subsequently, the simple and convenient traditional handcraft paper-making process enables the non-oriented intertwining of nanowires, forming a paper-like structure. Experimental results show that the thermal conductivity of silicon carbide nanowire paper with a thickness of 0.7 mm is 0.041 W/m∙K at room temperature, which is far lower than that of the traditional porous ceramics because of its nanoporous structure. Moreover, upon heating the nanowire paper to 300 °C, a significant temperature difference of approximately 150 °C was observed between its front and back surfaces, and it was able to withstand the butane flame (∼1300 °C) heat treatment for a long time, which indicated that the nanowire paper had obvious low thermal conductivity, good thermal insulation and refractory properties. These characteristics ensure the promising application of SiC nanowire paper for thermal insulation and fire resistance applications.
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Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Rongrong Du,Hongyang Zhu,Shuo Wang,Hongyao Zhao,Mengting Liu,Yanyun Wang,Yiyan Song,Fu Yang
Photothermal nanomaterials have showed great potential for development in simultaneous pollutant purification and freshwater recovery. In this study, a novel composite composed of hollow N-doping SiC porous hybrid network with the integration of CoCu bimetal species was constructed by a simple self-assembly and temperature-modulated approach. Such a hollow porous hybrid nanoreactor is endowed with abundant synergetic CuCo bimetallic reactive sites and polar pyrrolic N sites, which improves the enrichment of pollutants and intermetallic redox pairs. Ultrafine nanocrystals corresponding to Co 2 SiO 4 over the hybrid framework can be evidenced by HRTEM technique. The experimental results showed that the optimal CoSiCu-6 degraded norfloxacin (NFX) by 90.7% in 10 min with a pseudo-first-order rate constant of 0.493 min −1 , which was about 6.49 folds enhancement compared to Cu-free CoSi-6 counterparts, achieving a low reaction activation energy (18.02 kJ mol −1 ) during the reaction. Control experiments including anion interference and broad applicability for pollutants degradation were further explored, emphasizing the excellent performance of CoSiCu-6 in the practical contaminant removal. The mechanism study showed that, single linear oxygen ( 1 O 2 ) coupled with electron-transfer process work as the main activation routes dominating the degradation process. In addition, Co 3+ /Co 2+ /Cu 2+ redox pairs and oxygen vacancies (O v ) play a key role in the PMS activation process. The obtained optimal catalyst was further explored for solar-driven photothermal interfacial water evaporation, showing a rational cleanwater recovery efficiency (∼1.3 kg m −2 h −1 ) from the polluted wastewater. In addition, monolith floatable evaporator was constructed by anchoring CoSiCu-6 onto a tailored melamine sponge foam via a calcium ion-triggered sodium alginate cross-linking strategy, affording an excellent evaporation performance (2.16 kg m −2 h −1 ) and coupled norfloxacin degradation efficiency (93.6%, within 5 min). This innovative monolithic evaporator made of CoCu integrated SiC hybrid nanosphere has a powerful dual function of rapidly degrading pollutants and facilitating solar-powered regeneration of contaminated wastewater due to its unique hollow porous structure and the CoCu bimetallic synergistic action that provides a rich set of reaction sites, which is promising for the treatment of complicated wastewater.
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CERAMICS INTERNATIONAL
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2024
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IF 5.1
Sheng-Jin He,Jia-Pei Chen,Wei-Ming Guo,Xiu-Bing Chen,Huan Zhou,Chuang-Tian Zhan,Shi-Kuan Sun,Yun Li,Li-Xiang Wu,Jia-Xiang Xue,Hua-Tay Lin
In this study, CaO–Al 2 O 3 –MgO–SiO 2 glass was utilized to join SiC after surface polishing and etching, without the application of pressure. To join polished SiC at 1250 °C using CaO–Al 2 O 3 –MgO–SiO 2 glass proved unsuccessful. However, when polished SiC was joined at 1350 °C, the joint shear strength was 108.0 ± 15.5 MPa. Etching polished SiC with a NaOH–K 3 [Fe(CN) 6 ] solution effectively removed surface carbon, resulting in numerous micro-pits, that increased the joining area and improved the wettability of CaO–Al 2 O 3 –MgO–SiO 2 glass. The joint strengths of etched SiC joined at 1250 °C and 1350 °C were 29.0 ± 11.6 MPa and 125.1 ± 19.6 MPa, respectively. After ablation at 1200 °C for 10 min, the retained strength of the etched joints (joined at 1350 °C) was 61.9 ± 4.0 MPa, whereas the strength of the polished joints decreased to only 36.6 ± 10.7 MPa. Surface etching demonstrates the potential to significantly enhance the strength and high-temperature resistance of SiC joints.
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高影响因子
APPLIED SURFACE SCIENCE
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2024
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IF 6.3
Xiebo Hu,Ping Xu,Mingdong Liao,Xiuqing Lu,Guobo Shen,Chenghao Zhong,Mingyu Zhang,Qizhong Huang,Zhean Su
Poor intrinsic conductivity and significant volume expansion inhibit the application of SiO which shows high specific capacity in LIBs . In this study, we successfully prepared a SiC transition layer in the middle of SiO@C anode material to reduce its volume swelling by the direct infiltration and pyrolysis of polymethysilane. The results demonstrated that the introduction of the SiC transition layer effectively improved the electrochemical behavior of the SiO anode. The SiO@SiC@C composite showed a high initial coulombic efficiency of 78.99% and a reversible capacity of 1148.7 mAh g −1 after 200 cycles at 0.5 A g −1 , which displayed an extreme capacity retention of 91% compared to second discharge capacity (1263.5 mAh g −1 ). Moreover, the SiO@SiC@C exhibited superior rate capability of an average capacity recovery rate of 97% when the rate cycle recovered from 3 A g −1 to 0.1 A g −1 . It also displayed outstanding long-term cycling stability, retaining 78% of its discharge capacity of 483.3 mAh g −1 after 1000 cycles compared to the 7th cycle even at 3 A g −1 . In conclusion, the incorporation of the SiC transition layer for SiO electrodes exhibited considerable potential for developing high-performance anodes.
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ADVANCED FUNCTIONAL MATERIALS
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2024
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IF 18.5
Bocong Zou,Chunmei Chen,Li Sun,Yan Lin,Zhiheng Liu,Weijun Li,Lin Wang,Fengmei Gao,Huan He,Weiyou Yang,Dongdong Zhang,Shanliang Chen
Battery-free photodetection is necessary for underwater optical communication, which poses extremely high requirements in terms of the self-powering capability of photodetectors (PDs) and their ability to operate in harsh liquid environments. Emerging photoelectrochemical (PEC) PDs are appealing owing to their inherent aqueous operation behaviors with highly tunable photoresponses. Herein, a novel self-powered PEC ultraviolet (UV) PD applicable to all-scenario harsh underwater environments, including seawater at different latitudes and solutions with different pH values and temperatures, is demonstrated based on integrated self-supporting SiC/SnO 2 heterojunction nanoarrays. The SiC/SnO 2 heterojunction nanoarrays are achieved by utilizing the anodic oxidation and chemical bath deposition. The SiC/SnO 2 PEC PD demonstrates excellent photodetection performance with rapid rise/decay times ( τ r / τ d , 30/120 ms), high responsivity ( R λ , 1.97 A W −1 ), remarkable detectivity ( D * , 1.98 × 10 11 Jones), and large external quantum efficiency ( EQE , 65.5%) in seawater under 375 nm UV light illumination with zero bias voltage. Moreover, the PEC PD delivers a high photoresponse and excellent aging stability in different latitudes of the world's oceans. The photodetection capability is robust even under harsh conditions, such as strongly acidic and alkaline liquid conditions, and at high temperatures. The developed device is a new type of photodetection device for future all-scenario underwater optical communication.
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ACS Applied Materials & Interfaces
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2025
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IF 8.2
Ruyi Sha,Bingzhu Wang,Jixiang Dai,Jianjun Sha
Ceramic aerogels are promising high-temperature thermal insulation materials due to their outstanding thermal stability and oxidation resistance. However, restricted by nanoparticle-assembled network structures, conventional ceramic aerogels commonly suffer from inherent brittleness, volume shrinkage, and structural collapse at high temperatures. Here, to overcome such obstacles, 3D ultralight and highly porous carbon tube foams (CTFs) were designed and synthesized as the carbonaceous precursors, where melamine foams were used as the sacrificial templates to form the hollow and thin-wall network structures in the CTFs (density: ∼4.8 mg cm–3). Then, the arbitrary-shaped silicon carbide (SiC) nanofibrous aerogels (SNFAs) were obtained through a simple chemical vapor deposition (CVD) process on the CTFs. The resulting SNFAs exhibited excellent comprehensive performances: ultralow density (4.2 mg cm–3) and thermal conductivity (21.3 mW m–1 K–1 at room temperature), excellent rigidity (specific modulus: 13.2 kN·m kg–1), and resilient compressibility. The SNFAs could support over 2100 times their weight without visible deformation. Furthermore, the SNFAs also showed exceptional high-temperature thermal stability, which means that they could withstand 1100 °C in an air atmosphere and 1550 °C in an inert atmosphere. These superior comprehensive performances enable SNFAs to be suitable for thermal insulation in harsh environments.
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PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2024
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IF 5.8
Liang Zhou,Jianbao Hu,Yunhui Zhang,Le Gao,Wang Yuan,Han Luo,Yanmei Kan,Xiangyu Zhang,Jinshan Yang,Bin Wu,Xiaowu Chen,Shaoming Dong
To reduce the influence of TGO on EBCs performance, the Yb 2 SiO 5 -Yb 2 O 3 -Si-SiC ceramic was prepared by tape casting and reactive melt infiltration in this paper. During high-temperature water vapor corrosion, the ceramic formed a unique layered oxide layer structure to protect the material. On one hand, TGO is consumed by the reaction of Yb 2 O 3 and Yb 2 SiO 5 with SiO 2 ; On the other, the structure makes no TGO layer between the oxidized and unoxidized regions, which means that even if the TGO layer is stripped, the material still has a dense Yb 2 Si 2 O 7 and Yb 2 SiO 5 mixed layer as a protective barrier.
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危险品化学品经营许可证（带存储）