APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Runyi Bi,Minghui Sun,Linrui Hou,Changzhou Yuan
Spinel CuMn 2 O 4 (CMO) has attracted much attention for its exceptional high-temperature high infrared radiation (HIR) emissivity owing to its narrow band gap and unique symmetrical crystal structure. However, the HIR properties at medium/low temperatures limit its extensive application. Herein, we elaborately design and fabricate hierarchical CMO/SiC (CMO-S) hybrid microspheres with wrinkled surface and porous cavity inside via spray-drying method. In the framework, SiC is encapsulated in the porous CMO microspheres, which substantially improves the medium/low-temperature HIR emissivity of spinel CMO and inhibits the oxidative failure of SiC meanwhile. The optimal CMO-S with 10 wt% SiC (CMO-S10) possesses the largest specific surface area, the richest oxygen vacancies, and the smallest band gap, which cooperatively render remarkable HIR emissivity of 0.935 at 30 °C in the 3 ‒ 5 μm band, along with the highest emissivity (0.944) at 300 °C. Moreover, the CMO-S10 based emitting coating exhibits superb heat dissipation efficiency as well thanks to its superb HIR emissivity in 8 ‒ 14 μm band. More essentially, our insights here provide meaningful guidance for rational construction of advanced HIR emitting materials toward efficient heat dissipation, leading more green and sustainable energy consumption.
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高影响因子
Materials
·
2025
·Vol. 18
·期 17
·4071
·
IF 3.2
Jialin Bai,Xiumin Yao,Xuejian Liu,Zhengren Huang
SiC nanowires (SiCnw), due to their excellent dielectric properties, are promising high-temperature absorbing materials. However, the mechanism of their high-temperature absorption still requires further research. Therefore, porous SiCnw/Si3N4and SiC/Si3N4ceramics with different SiC phase morphologies were fabricated using a simple precursor impregnation and pyrolysis method. The Fe impurity content of the Si3N4powder raw material significantly affects the generation of SiC nanowires. When SiC exists in the form of nanowires, the excellent conductivity brought by the conductive network of the nanowires causes a significant response of the material’s permittivity to temperature. When the test temperature is room temperature, SiCnw/Si3N4has excellent absorption performance with a minimum reflection loss of −29.75 dB at 2.16 mm and an effective absorption bandwidth of 3.72 GHz at 2.54 mm. As the test temperature increases to 300 °C, the effective absorption bandwidth of SiCnw/Si3N4covers the entire X-band. The porous SiCnw/Si3N4ceramics exhibit excellent electromagnetic wave absorption performance, demonstrating significant application potential for high-temperature environments.
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DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2018
·
IF 5.123
Min-Fu Wu,Yu Wang,Sha Li,Xiu-Xiu Dong,Jin-Yi Yang,Yu-Dong Shen,Hong Wang,Yuan-Ming Sun,Hong-Tao Lei,Zhen-Lin Xu
An electrochemical immunosensor for ultrasensitive detection of acrylamide (AA) in water and food samples was developed. SnO 2 -SiC hollow sphere nanochains with high surface area and gold nanoparticles with good electroconductivity were fabricated onto the surface of a glassy carbon electrode pre-coated with chitosan. The coating antigen (AA-4-mercaptophenylacetic acid-ovalbumin conjugate , AA-4-MPA-OVA) was immobilized on the electrode. Polyclonal antibody specific for AA-4-MPA was conjugated to gold nanorod (AuNR) as primary antibody (AuNR-Ab 1 ). Horseradish peroxidase labelled anti-rabbit antibody produced in goat was conjugated to AuNR as secondary antibody (HRP-AuNR-Ab 2 ). For detection, the analyte (AA-4-MPA) in sample competed with coating antigen for binding with AuNR-Ab 1 . After washing, HRP-AuNR-Ab 2 was added to capture the AuNR-Ab 1 , and the electrical signal was obtained by addition of hydroquinone and H 2 O 2 . After investigation of the binding ability on nanomaterials and optimization of competitive immunoassay conditions, the proposed immunosensor exhibited a sensitive response to AA with a detection limit of 45.9 ± 2.7 ng kg −1 , and working range of 187 ± 12.3 ng kg −1 to 104 ± 8.2 μg kg −1 for drinking water samples. Recoveries of AA from spiked samples were ranged from 86.0% to 115.0%. The specificity, repeatability and stability of the immunosensor were also proved to be acceptable, indicating its potential application in AA monitoring.
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DOI
PubMed
高影响因子
Metals
·
2025
·Vol. 15
·期 12
·1320
·
IF 2.5
Xinyi Yuan,Rongcheng Sheng,Yizhe Du,Dengfu Chen,Mujun Long,Huamei Duan
To address the demands of modern high-speed and high-quality continuous casting production, depositing high-performance coatings on the surface of mold copper plates is critically important for extending the service life of continuous casting molds. To this end, a Ni-Co-Cr/SiC nanocomposite coating was developed, and cryogenic treatment was applied to further improve its hardness and wear resistance. This work systematically investigates the microstructural evolution and performance enhancement of the Ni-Co-Cr/SiC nanocomposite coating under different cryogenic treatment parameters, with special emphasis on the effects of treatment temperature on the coating’s microstructure, hardness, wear resistance, and adhesion to the substrate. The results demonstrate that decreasing the cryogenic treatment temperature and extending the holding time effectively refine the grains of the coating while simultaneously promoting the accumulation of microstrain and dislocation density. These changes lead to significant improvements in hardness, wear resistance, and interfacial bonding performance. Specifically, after direct immersion at −196 °C for 16 h, the coating reached a hardness value of 946.5 HV, and the wear rate was reduced to 0.032 mm3·(N·m)−1, representing only 54.6% of that of the untreated coating. The dominant wear mechanism transitioned to a mixed mode of abrasive wear and oxidative wear. Moreover, the cryogenic treatment enhanced the stability of the coating-substrate adhesion.
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2024
·
IF 5.8
Xinhao Shi,Liping Wang,Wanbo Hou,Jiahui Ding,Tao Feng,Hongjiao Lin,Mingde Tong
Multiphase HfC-SiC ceramic matrix composites were prepared by a combination process. The interface mechanics and ablation properties behaviors were investigated. Introducing the PyC-SiC interface, the composites showed a second-order pull-out mechanism. The mechanical failure model showed that fibers and matrix have different failure strain under load depending on the component that fails first. Moreover, the ablative airflow in the center area will spread to the edge area through the thermal shock microcracks generated. Increasing of the heat flux, the crack width gradually increased to be ditches. It accelerated the evolution of surface morphology, which showed HfC-SiC substrate was first transformed into Hf-Si-O solid solution on the process of phase transformation of oxidation products from 1680 ℃ to 2150 ℃, and eventually sintered into HfO 2 . The change in the morphology of oxidation product consumed more heat and protected the substrate from oxidation, resulting in improving the ablation resistance of composites.
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高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Dongyang Zhang,Ping Hu,Shun Dong,Qiang Qu,Xinghong Zhang
The high sintering temperature and interface interaction seriously degraded the toughening effects of continuous carbon fiber in ZrB 2 -SiC ceramic. The pyrolytic carbon coated carbon fiber reinforced ZrB 2 -SiC composite (C f-PyC /ZrB 2 -SiC) with desirable properties was successfully achieved via brushing nano ZrB 2 -SiC slurry followed by spark plasma sintering at relatively low sintering temperature. The fabricated C f-PyC /ZrB 2 -SiC composite presented a non-brittle fracture feature and a remarkable enhancement in comparison with the ZrB 2 -SiC composite reinforced by the as-received carbon fiber (C f-AS /ZrB 2 -SiC). The fracture toughness and critical crack size were increased from 5.97 ± 0.18–7.66 ± 0.24 MPa m 1/2 and from 91.6 to 164.5 µm, respectively. A high work of fracture of 1915 J/m 2 for C f-PyC /ZrB 2 -SiC composite was achieved, almost four times higher than that of the C f-AS /ZrB 2 -SiC composite (463 J/m 2 ). Multiple toughening mechanisms contributed to such enhancement, such as crack deflection, fiber bridging, fiber pull-out and crack branching. This work provides a feasible approach to fabricate high-performance fiber reinforced ceramic composites having a high work of fracture.
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高影响因子
CRYSTENGCOMM
·
2019
·Vol. 21
·期 32
·4740-4746
·
IF 3.382
Jingbo He,Bo Sun,Yong Sun,Chengxin Wang
Although more than 250 polytypes of silicon carbide (SiC) crystals have been discovered, only very limited types of nanowires can be synthesized in a controllable manner. Both experimental and theoretical investigation reveal that 3C-SiC is the most stable form, which is the primary product of nanowires synthesized via various methods in thousands of reports. Although hexagonal phases, particularly the wurtzite structure with a bandgap of 3.33 eV is promising in optoelectronic applications, the fabrication of nanowires with theses phases is still rare. Herein, in this study, by precisely regulating the atmospheric conditions, we revealed that the CH4 supply resulted in the phase-selective growth between 3C- and 2H-SiC nanowires. As the CH4 flow rate increased, it was possible to fabricate 3C-SiC, hybrid 3C-/2H-SiC and 2H-SiC nanowires in a controllable manner. The possible mechanism is demonstrated accordingly. We believe this progress benefits the structural design and optoelectronic application of SiC nanowires.
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高影响因子
CARBON
·
2024
·
IF 10.5
Jingxiang Liu,Zhen Wang,Haoquan Hao,Qinghe Jing,Shouqing Yan,Jie Guo,Wentao Liu,Zhijiang Wang
SiC aerogels have been extensively studied for electromagnetic wave (EMW) absorption because of their tunable dielectric properties. Continuous dual-peak EMW absorption can broaden the effective absorption bandwidth (EAB); however, few SiC aerogels have been reported to exhibit this phenomenon and the mechanisms to achieve this through microstructure design remain unclear. In this study, size-tunable nanopores were constructed in SiC aerogel by a simple carbothermal reduction method, which gradually increase with increasing reaction temperature. The mechanism of the nanopore formation in SiC aerogels is also discussed in detail. The optimized SiC aerogel prepared at a reaction temperature of 1550 °C exhibited continuous dual-peak EMW absorption with a maximum EAB of 6.24 GHz (11.76–18 GHz), full Ku-band coverage, and minimum reflection loss of −32.59 dB. This continuous dual-peak EMW absorption was ascribed to the overlap of the secondary peak caused by the nanopore-induced strong dielectric resonance and the main peak caused by SiC. The results of this study will provide inspiration for the design of microstructures for continuous dual-peak absorption in EMW absorption materials.
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高影响因子
Lubricants
·
2023
·Vol. 11
·期 9
·387
·
IF 3.5
Tingting Wang,Liang Zhang,Hao Chen,Li Wu,Xinlei Gao
In this study, a systematic test of 36 organic liquid compounds as lubricants in the SiC/PI friction pair was conducted to investigate their friction-reducing performance. The back propagation neural network (BPNN) method was employed to establish a quantitative structure tribo-ability relationship (QSTR) model for the friction performance of these lubricants. The developed BPNN-QSTR model exhibited excellent fitting and predictive accuracy, withR2= 0.9700,R2(LOO) = 0.6570, andq2= 0.8606. The impact of different descriptors in the model on the friction-reducing performance of the lubricants was explored. The results provide valuable guidance for the design and optimization of lubricants in SiC/PI friction systems, contributing to the development of high-performance lubrication systems.Keywords:organic liquid lubricants;quantitative structure tribo-ability relationship;back propagation neural network;friction-reducing performance
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yong Zhang,Yuchang Qing,Junjie Yang,Chuanyang Jiang
SiC, with outstanding oxidation stability and tunable dielectric property, has been regarded as a promising microwave absorption material for high-temperature applications. However, the application of pristine SiC is restricted by its inadequate dielectric response and weak loss capability. Herein, a novel strategy is proposed to construct Cr-Si-C conductive shell on SiC surface via molten salt method is proposed to introduce heterogeneous interfaces and enhance dielectric loss. The optimal SiC@Cr-Si-C core-shell sample achieves a minimum reflection loss (RL m ᵢ n ) of −36.7 dB at a matching thickness of 1.4 mm. Meanwhile, it exhibits an effective absorption bandwidth (EAB) of 2.41 GHz. Notably, even after heat treatment at 600 °C in air for 5 h, the core-shell absorber maintains an intact core-shell structure and its RL m ᵢ n remains as high as −34.4 dB, demonstrating superior high-temperature stability. This work provides an effective method for high-performance microwave absorption materials targeted at high-temperature applications.
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·Vol. 46
·期 6
·118070
·
IF 6.2
Lingzhi Chen,Ce Zheng,Dongying Wang,Yichun Bi,Chaofan Yang,Shengkai Wang,Xiaoqiang Li
Developing a pressure-less joining process operable at tolerable temperatures is crucial for practical engineering deployment of SiC f /SiC thin-walled cladding tubes. Hereby, we invented a low-temperature pressure-less Nano-Infiltration and Transient Eutectic (NITE) joining method for SiC f /SiC composites using Al 2 O 3 and Y 2 O 3 sintering additives, achieving successful bonding at 1600 ℃ for 2.5 h without interfacial debonding. The joint microstructure consisted of SiC with finely distributed Y 3 Al 5 O 12 intergranular phase, exhibiting excellent integrity and mechanical performance (shear strength of 46.7 ± 2.7 MPa). After 8 h steam oxidation at 1200 ℃, joints retained 77.9 % strength (36.4 ± 6.8 MPa) through protective SiO 2 /AlOOH layers and Y-silicate transformations. Successful SiC f /SiC cladding tube encapsulation demonstrated technical feasibility, with XCT revealing robust bonding despite minor inner-wall densification issues. This work establishes NITE as a viable solution for nuclear applications, combining favorable processing conditions with superior joint performance.
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高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Jie Wang,Xueliang Pei,Jianhai Zhi,Jing Huang,Gaoming Mo,Yanfei Wang,Xiali Zhen,Liu He,Qing Huang
A novel, easy and cost-effective way, infiltration and pyrolysis of phenolic resin solution, was exploited to prepare pyrolytic carbon (PyC) interlayers for carbon fiber/silicon carbide (Cf/SiC) mini-composites. X-ray photoelectron spectroscopy, dynamic contact angle measurement and scanning electron microscope were carried out to characterize chemical structure of carbon fibers (CFs), wetting properties between CFs and phenolic resin solution and microstructure of CFs and their composites, respectively. Remarkably, SEM results showed regulation of uniformity and thicknesses of PyC interlayer could be achieved through controlling the concentration of phenolic resin solution and oxidation condition of CFs. When CFs were treated by 10 min' oxidation with 40 mg/L ozone followed by dip-coating with 4 wt% phenolic solution, uniform PyC interlayer with approximately 120 nm were prepared on CFs. The corresponding Cf/SiC specimens had the largest increase in tensile strength and work of fracture with the improvement of 26.2% and 71.6% from the PyC-free case.
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高影响因子
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