Materials Today Communications
·
2024
·
IF 3.7
Jie You,Yang Wang,Hongwei Wang,Jian Yang,Quan Li,Jian Gu
In this paper, a new process for preparing porous SiC foam with three-dimensional network structure is presented. A certain thickness of SiC coating is deposited on the surface of ultra-light carbon skeleton by CVD process, so as to achieve effective control of its structure and mechanical properties. The effects of CVD deposition time on the density, porosity and skeleton thickness rates of SiC foams were explored. By increasing the CVD deposition time, the structure of SiC foams can be effectively regulated, and the mechanical properties of SiC foams can be significantly improved. The porosity of the prepared SiC foam can be adjusted in a wide range (26.9%∼94.68%). When the density of SiC foam increases from 0.67 g/cm 3 to 2.36 g/cm 3 , its bending strength increases from 27.4 MPa to 136.9 MPa, which is significantly improved. After high temperature oxidation treatment (800–1200 °C), the mechanical properties of SiC foam will be further improved. However, when the oxidation temperature reaches 1400 °C, its mechanical properties will be reduced. This research provides a new idea for the preparation of high-performance porous SiC ceramics, and lays a foundation for its structural design, manufacture and application.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yuwei Wang,Xiaoyan Yuan,Zhuoying Ping,Dan Wei
One-dimensional materials are broadly applied in electromagnetic wave (EMW) absorption due to their fast electron transport paths. Herein, SiC/C nanofibers (SiC/C NFs) with rough surface and fluffy structure were prepared by electrospinning, using zinc acetylacetone as a structural modifier. The morphology and microstructure of the as-prepared fibers were changed by Zn sublimation during heat treatment process, leading to significantly improve their dielectric parameters and EMW absorption performance. The minimum reflection loss (RL, dB) of the SiC/C NFs/paraffin with a filling ratio of 15 wt% was −46.77 dB, and effective absorption bandwidth (EAB, RL < −10 dB) reached 5.84 GHz at 1.96 mm. The delightful performance was mainly attributed to the fluffy microstructure caused by the Zn sublimation, the fast electron transport paths established by the fibers, and the enhanced polarization loss brought by effective heterogeneous interfaces. Therefore, a referable strategy was put forward structural engineering for the absorber of SiC/C NFs.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
P. Wang,S.S. Zhu,S.P. Zhang,F. Su,J.K. Yuan,Y.J. Jia,Y.Q. Fu,T. Li,Y.L. Zhang,P. Ramasamy,J. Eckert,C.S. Lao,Z.W. Chen
Zr-based ultra-high temperature ceramics (UHTCs) are widely used as the key parts of aircrafts in thermal protection systems. However, such materials usually have a high sintering temperature and it is difficult to obtain complex parts using traditional manufacturing methods. This study reports on the success preparation of complex Zr-based UHTCs by a light-curing 3D printing process. The results indicate that the smaller the precursor particle size, the higher is the viscosity of the slurry used for printing. Slurries with a better curing performance can be prepared by mixing various active diluents and photoinitiators with an optimized certain proportion. The stability of the slurry can be improved by adding coupling agents and dispersants. The main components of the 3D printed green parts are ZrC, SiC and pyrolytic carbon at 1800 °C, yielding a high compressive strength (102 ± 2 MPa) and elastic modulus (65 ± 1 GPa). ZrC/SiC composite ceramic parts with low open porosity (3.99 %) were obtained by 3D printing after heat treatment, which provides an effective way to design complex UHTC parts for extreme environment applications.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Xue-Ting Li,Kai Zhang,Jian Wei,Yan-Bin Zhang,Zhuang Miao,Jia-Yi Hou,Yi Yao
Designing composite electromagnetic wave absorption (EWA) materials with a strategic structure is a key approach to improve the EWA efficiency of SiC nanowires (SiCNWs). In this study, SiCNWs/reduced graphene oxide (SiCNWs/RGO) composites with layered porous structures were successfully prepared using homemade SiCNWs and graphene oxide (GO) using simple freeze-drying and heat treatment techniques. Then the EWA performance of SiCNWs/RGO with different filling amounts (5 wt%, 15 wt% and 25 wt%) was investigated. A minimum reflection loss (RLmin) value of −47 dB at 12.7 GHz was achieved when SiCNWs/RGO was filled with 5 wt% and the coating thickness was 2.2 mm. When the coating thickness was reduced to 2.0 mm, the effective absorption bandwidth (EAB) extended to 5.78 GHz (12.02 to 17.8 GHz), covering the entire Ku band. The outstanding EWA performance was primarily due to the layered porous structure, which facilitates multiple reflections and scattering of electromagnetic waves (EMWs). This structure not only lengthened the wave attenuation path but also worked synergistically with dielectric and conductive losses. The SiCNWs/RGO composites prepared in this study are characterized by light weight, thin thickness and high absorption rate, enabling them to be particularly suitable for electromagnetic shielding in the field of livelihood and ecology.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·Vol. 108
·期 12
·e70209
·
IF 3.8
Zirui Du,Chaokun Song,Kang Guan,Pinggen Rao,Xiaohui Yang,Longteng Bai,Shengbo Shi,Jing Wang,Yongsheng Liu,Qingfeng Zeng
Improving the ablation resistance of carbon fiber-reinforced silicon carbide (C/SiC) composites is essential to meet the stringent demands of ultra-high-temperature applications, but traditional empirical design approaches are resource-intensive and time-consuming. This study presents a novel data-driven methodology integrating machine learning (ML) with experimental validation to optimize C/SiC composite ablation resistance. Through systematic data preprocessing and feature analysis of 102 experimental samples, an XGBoost regression model was developed, achieving satisfactory prediction accuracy (mean absolute error < ∼0.075, mean squared error < ∼0.015, and coefficient of determination [R 2 ] > ∼0.75) for ablation rate. SHapley Additive exPlanations (SHAP) analysis revealed that modifier properties, particularly standard enthalpy and melting point, predominantly influence ablation resistance. The ML-guided design strategy, implemented through Bayesian optimization, led to the successful fabrication of ZrB 2 -modified C/SiC composites with exceptional ablation resistance. The optimized composite, containing approximately 20.0 vol.% ZrB 2 , achieved a linear ablation rate of 2.083 µm/s under oxyacetylene torch testing, representing a significant improvement over conventional compositions. Microstructural analysis confirmed the formation of a dense SiO 2 ‒B 2 O 3 protective layer, validating the predicted mechanism of enhanced ablation resistance. This work establishes a robust framework for accelerated development of ultra-high-temperature ceramics and demonstrates the efficacy of ML-driven approaches in materials design optimization. An object-oriented software with interactive graphical user interface has been developed. These methodologies have been integrated into an interactive software, Modified C/SiC Ablation Rate intelligent design Software (MARS), creating an efficient tool for the accelerated design of C/SiC composites with tailored ablation performance.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jiaqi Tan,Shuping Wen,Xiaoqian Lin,Liya Zheng,Zhilin Tian,Bin Li
Two-dimensional nanomaterials have garnered significant attention for electromagnetic wave absorption applications. However, developing effective microwave absorption materials suitable for complex environments remains a significant challenge. In this study, multifunctional rGO/MXene/SiC nanowires (GMS) aerogels are synthesized through a hydrothermal and electrostatic self-assembly method. The three-dimensional rGO/MXene skeleton with a hierarchical porous structure endows GMS aerogel with low density (11.4 mg cm −3 ) and thermal conductivity (30.1 mW·m −1 ·K −1 ). The incorporation of SiC nanowire enhances the mechanical properties of the aerogel, achieving a compressive strength of approximately 7.64 kPa at 30 % strain. Furthermore, SiC nanowire introduces numerous heterogeneous interfaces, which regulate electrical conductivity and improve impedance matching. The presence of abundant lattice defects and functional groups contributes to the exceptional microwave absorption performance of the aerogel, which achieves a minimum reflection loss of −81.04 dB at a thickness of 2.68 mm with a low filling ratio of 5.5 wt%. The effective absorption bandwidth covers the entire Ku band with an optimal thickness range from 2.58 to 2.81 mm. Additionally, the aerogel demonstrates excellent pressure-sensing capability, responding rapidly to various human movements. Therefore, this study provides a promising design strategy for high-performance microwave absorbers with multifunctionality.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Xiao-Nan Zhou,Mu-Lun Wu,Xu Hao,Jia-Xin Li,Yu Song,Biao Zhang,Zhi-Lei Wei,Jian-Feng Yang,Bo Wang,Kozo Ishizaki
Hollow spherical SiC ceramics exhibit significant potential as multifunctional and structural materials. Herein, the β-SiC hollow spheres were synthesized by in-situ vapor-solid reaction (carbothermal reduction) between mesocarbon microbeads (MCMB) and SiO vapor generated from SiO powders, and subsequent removal of the residual carbon cores by oxidization. The diameter of SiC hollow spheres accurately inherits the size of pristine MCMB, demonstrating a shape memory effect. Meanwhile, the shell thickness of SiC hollow sphere can be autonomously regulated from 0.46 to 3.87 μm by adjusting the siliconization degree (corresponding to the content of SiO). In addition, a variety of characterizations were used to describe the phase and structure of SiC hollow spheres, confirming their high-purity. The SiC hollow spheres also exhibit a high specific surface area of 4.21 m 2 g −1 and good thermal stability. This technique presents a new paradigm in the preparation of hollow spheres.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yanni Ran,Kang Peng,Ziyan Li,Xingwang Guo,Honglin Chen,Shengxuan Cai,Lei Su,Min Niu,De Lu,Hongjie Wang
CO 2 capture can mitigate carbon emissions with the objective of achieving carbon neutrality. Solid amine adsorbents have emerged as one of the most promising materials for capturing CO 2 . However, balancing the diffusion and adsorption of CO 2 remains a significant challenge, making it difficult to achieve high capacity and rapid kinetics simultaneously. In this study, SiC nanowires aerogel (SiCNWA) was functionalized with tetraethylenepentamine (TEPA) and diethanolamine (DEA) for CO 2 capture. The optimal adsorbent was synthesized with a total amine loading of 90 wt%, comprising 75 wt% TEPA and 25 wt% DEA. It exhibits a high CO 2 adsorption capacity of 4.71 mmol/g and ultra-rapid adsorption kinetics, achieving 80 % adsorption capacity within the first minute. The advantageous properties stem from the synergistic effects arising from the unique three-dimensional network structure of SiCNWA, coupled with the complementary group interactions of the hybrid amines. The ultra-high porosity of aerogel facilitates a high proportion of amine loading and dispersion, contributing to its high CO 2 adsorption capacity. Additionally, the continuous network structure offers efficient channels for CO 2 transport, enabling ultra-rapid CO 2 adsorption kinetics. The high amine density of TEPA provides abundant adsorption sites for CO 2 , and the addition of DEA can effectively mitigate the aggregation and deactivation of amine groups, thereby significantly improving the adsorption rate and adsorption capacity. This aerogel-hybrid amines strategy effectively balances diffusion and adsorption, offering valuable insights for advancing aerogel-based materials for CO 2 capture.
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Korean Ceramic Society
·
2024
·
IF 2.7
Wang Zikang,Qian Miao,Shao Geyu,Xu Yuzhen,Song Qi
In this study, spark plasma sintering technology was used for fabricating B 4 C composite ceramics that contained 30 wt% (TiB 2 + SiC) by altering the sintering pressures (0 MPa, 50 MPa, and 80 MPa) at a comparatively low temperature of 1650 °C. This study showed how sintering pressure affected the densification behavior, microstructures, and mechanical characteristics of composite ceramics. Elevating the sintering pressure led to the inhibition of grain growth during the sintering process, ultimately resulting in the refinement of grains within the composite ceramics. At the same time, the quantity of internal pores in the composite ceramics was reduced, and the relative densities increased, so the flexural strength and hardness of the composite ceramics could be effectively improved. The quantity of microcracks and large aspect ratio second phase particles decreased with an increase in sintering pressure, which adversely affected the fracture resistance characteristics of the composite ceramics. In addition, the growth of B 4 C grains was hindered by TiB 2 and SiC generated by in-situ reactions, thus improving the mechanical characteristics of the composite ceramics. Comprehensive analysis showed that the composite ceramics had the best comprehensive mechanical properties when the sintering pressure was 80 MPa, displaying a relative density of 98.65%, a Vickers hardness of 30.71 GPa, a flexural strength of 531.19 MPa, and a fracture toughness of 5.78 MPa m 1/2 .
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Ao Han,Gang Wang,Wei Wang,Yu Zhao,Rujie He,Caiwang Tan
Negative coefficient of thermal expansion (Sr 0.2 Ba 0.8 )TiO 3 (SBT) nanoparticles are produced by ball milling and twice sintering process and coated with Cu foam (Cu f ) as an interlayer for brazing SiC and Nb. The influence of SBT content on the microstructural, shear strength, and fracture mechanism of SiC/Nb joints is investigated. In particular, SBT/Cu f foam is utilized to modify the coefficient of thermal expansion of the AgCuTi/SBT/Cu f /AgCuTi composite filler, resulting in a reduction of residual stresses in the joints. The residual stresses at the joints are calculated as well as analyzed the mechanism of residual stress relief by SBT. Following the introduction of the interlayer, the maximum shear strength of the joint is approximately 72 MPa, which is 164 % higher than the performance of the joint with uncoated SBT.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·Vol. 107
·期 10
·6821-6832
·
IF 3.5
Huihui Zhang,Guocheng Ma,Haibo Wu,Ming Yuan,Xuejian Liu,Zhengren Huang
SiC-based porous ceramic wave-absorbing materials have attracted much attention due to their excellent properties such as low density, high-temperature resistance, and oxidation resistance. In this work, the impedance matching of SiC ceramics is improved by introducing Si 3 N 4 wave-transparent phase, and the dielectric loss capability of SiC ceramics is enhanced by introducing FeSi wave loss phase. To achieve a balance between impedance matching and absorption loss in porous ceramics, different molar contents of Al were introduced into FeSi to tailor electromagnetic parameters. The effects of introducing FeAl x Si 1− x on the phase composition, microstructure, dielectric loss, and microwave absorption mechanism of SiC–Si 3 N 4 porous ceramics were systematically investigated. When FeAl 0.25 Si 0.75 is added, the minimum reflection loss of the porous ceramics is as low as −58.02 dB, and the flexural strength is as high as 87.23 MPa. The presence of Al promotes the transformation of the Si 3 N 4 crystal and the generation of Al 2 O 3 . The introduction of FeAl 0.25 Si 0.75 into SiC–Si 3 N 4 has constructed “inductor–capacitor–resistance” microcircuit, which enhances polarization loss, conductivity loss, and magnetic loss, and realized the double enhancement of the mechanical and wave-absorbing properties of porous ceramics.
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Xiangzhi Xue,Zheng Liang,Jian Zhou,Huiqin Zhang,Qilin Gu,Zhaoxiang Zhong,Weihong Xing
Brine purification process using ceramic membrane has the advantages of short process, high filtration precision, low cost and long life. Silicon carbide (SiC) ceramic membranes are featured by excellent hydrophilicity and unique negatively charged surface. This work focused on the application of low-temperature reaction bonded SiC membranes in brine purification, and commercial SiC membranes prepared by the recrystallisation method were also adopted for comparison. Under low-energy conditions (transmembrane pressure ≤0.1 MPa, crossflow velocity ≤2 m·s -1 ), the low-temperature reaction bonded SiC membranes exhibited higher stable flux and superior antifouling performance (i.e., lower flux decline), attributed to the formation of a cake layer on the membrane surface. However, at high pressures (>0.1 MPa) and velocities (>2 m·s -1 ), some precipitated particles entered the pores of reaction bonded SiC membranes, resulting minor pore blockage, reducing permeability. Interestingly, the gradually increased initial permeate flux observed in cycling filtration was attributed to the increased surface hydrophilicity of SiC membranes. Therefore, low-temperature reaction bonded SiC membranes can provide a high-efficient and energy-saving brine purification process in the chlor-alkali industry.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）