CERAMICS INTERNATIONAL
·
2022
·Vol. 48
·期 16
·23258-23265
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IF 5.532
Jianlong Chai,Yabin Zhu,Xing Gao,Tielong Shen,Lijuan Niu,Shufen Li,Peng Jin,Minghuan Cui,Zhiguang Wang
Al 2 O 3 /SiC ceramic composites with different SiC contents have been prepared by powder metallurgy at 1600 °C for 120 min at 30 MPa pressure. The effect of second phase particles on the microstructure and mechanical properties of composites have been studied. The results show that SiC particle has a significant impact on the matrix subjected to residual stress, and on the microstructure of the composites as well. The average grain size of alumina matrix decreases as the SiC particle content increases. Simultaneously, it has been found that the mechanical properties of the material are significantly enhanced in comparison with monolithic Al 2 O 3 . The highest strength and toughness are obtained when the SiC content is 15 vol%, and the values are 1237 MPa and 5.68 MPa m 1/2 , respectively. The mechanisms of strengthening and toughening have been discussed.
研究领域:
材料科学
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陶瓷学
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复合材料工程
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固态物理
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粉末冶金
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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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高影响因子
CERAMICS INTERNATIONAL
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2026
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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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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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高影响因子
CERAMICS INTERNATIONAL
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2026
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IF 6
Wei Shang,Changgeng Li,Jiangli Wu,Shunxing Wan,Yunjun Ruan,Xiu-Zhi Tang,Tong Guo
Driven by the increasing demands of flexible electronic devices operating in complex electromagnetic environments, the development of lightweight microwave absorbing materials with integrated flexibility, efficient absorption, and thermal stability is of great significance. Herein, a flexible silicon carbide nanofiber film (SZF) decorated with ZIF-8-derived nanoparticles is fabricated through electrospinning followed by high-temperature carbonization. Benefiting from the high aspect ratio and three-dimensional interconnected network of SiC nanofibers, the deformation stress can be effectively dissipated through fiber bending and sliding, endowing SZF with moderate mechanical flexibility. The 3D porous architecture enables incident electromagnetic waves to penetrate deeply into the SiC-based composite network, thereby promoting multiple scattering and reflection effects. Through a metal–organic framework (MOF)-derived strategy, abundant heterogeneous interfaces are introduced within the fibers, coupling the metal modification effect derived from ZIF-8 with the intrinsic dielectric properties and thermal stability of SiC. The ZIF-8-derived nanoparticles exhibit dimensions comparable to those of SiC nanofibers and are uniformly dispersed throughout the SiC matrix, reinforcing interfacial bonding and facilitating charge transport as well as multiple polarization relaxations. These synergistic effects optimize impedance matching and enhance electromagnetic attenuation through increased interfacial polarization and dielectric loss. Consequently, SZF demonstrates strong microwave absorption performance, achieving a minimum reflection loss (RLmin) of –56.29 dB at 12.58 GHz and an effective absorption bandwidth (EAB) of 5.38 GHz at a thickness of 2.5 mm. This study offers a viable strategy for designing lightweight materials that simultaneously feature flexibility, thermal robustness, and high-efficiency microwave absorption, holding great promise for advanced flexible electromagnetic protection systems.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
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IF 12.5
Qiang Zhou,Jian Wang,Yangmingxu Meng,Yi Li,Xianglong Zhao,Zexuan Meng,Jiuxi Sui,Lu Yang,Jiajia Chen,Xuanbing Wang,Ji Gong,Guangqiang Pan,Yuchan Zhang,Guangchao Zang
Silicon carbide (SiC) nanoelectrodes show promise for intracellular molecule monitoring but face challenges due to high resistance and chemical inertness, which necessitate functional surface modification to improve detection Performance. In this study, we address the bottlenecks of insufficient functional groups in nanowires prepared by traditional chemical vapor deposition (CVD) and poor conductivity of polymer modification methods, via a novel conductive functionalized hydrothermal carbon coating (HTCC) interface engineering approach. Rooted in the inherent tendency of carbon nanospheres to self-assemble and adhere tightly via intermolecular interactions during hydrothermal synthesis, the approach uniformly coats the surface of inert SiC nanowires with a hydrothermal carbon layer endowed with high conductivity, stability, and abundant functional groups. The Pt/Pd-Cs-HTCC@SiC constructed based on this strategy has been successfully applied to the in-situ monitoring of intracellular reactive oxygen species (ROS), revealing the mechanism by which glutathione (GSH) blocks tau protein phosphorylation by inhibiting the p38 mitogen-activated protein kinase (p38-MAPK) pathway, thereby alleviating the hepatotoxicity of microcystin-LR (MC-LR). This study provides a surface engineering approach for SiC nanoelectrodes and offers crucial scientific insight into the hepatotoxicity mechanisms of environmental toxins.
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2026
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IF 7.6
Sun Ruize,Liu Xiaonan,Chen Jingge,Chen Zhangguo,Zhou Jicheng,Xu Wentao
Propane direct dehydrogenation (PDH) is an important way for the high-value utilization of propane (C 3 H 8 ). However, the conventional thermal catalytic reaction process is limited by the thermodynamic equilibrium of the strong endothermic reaction, and usually needs to be operated at high temperature, which makes it difficult to balance high conversion and high selectivity. In this study, a new method of microwave catalytic dehydrogenation of C 3 H 8 to propylene (C 3 H 6 ) at low temperature and high efficiency was proposed, and Pt-ZnO/S-1 + SiC microwave catalyst was developed. It was found that microwave significantly improved the conversion and selectivity of the catalyst, and the reaction was carried out efficiently at lower temperatures. Under low temperature microwave catalysis (MCRM) at 450 ° C, the conversion of C 3 H 8 was as high as 46.4%, and the selectivity of C 3 H 6 was as high as 99.3%, which were significantly better than 18.4% conversion and 95.1% selectivity under conventional thermal catalysis (CRM). Further study shows that the microwave action reduces the apparent activation energy of the catalyst from 75.5 kJ·mol −1 under CRM to 48.7 kJ·mol −1 under MCRM. This study provides a new strategy for the low-temperature and efficient conversion of low-carbon alkanes such as C 3 H 8 and provides a new idea for the application of microwave catalytic technology in other catalytic reactions.
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高影响因子
Materials Today Communications
·
2026
·
IF 4.9
Fuwen Chen,Wei Yang,Jiong Zhao,Bin Liu,Weipeng Miao,Bozhi Li,Yafei Fan
The fabrication of high-performance SiC power devices imposes stringent requirements on low-damage and high-consistency wafer thinning processes. To address challenges associated with ultrafine abrasive dispersion and pore structure regulation in vitrified-bonded diamond grinding wheels, the present study proposed an ice-templating method to fabricate diamond grinding wheels with aligned porous structures. Effects of solid loading and glycerol content on microstructure, mechanical properties, and grinding performance of the wheels were systematically investigated. Results showed that glycerol regulated ice crystal morphology, transforming pore structure from lamellar to interconnected “bead-like” form while significantly enhancing flexural strength. Increasing solid loading reduced lamellar spacing and improved both density and strength. Grinding wheel prepared with solid loading of 60 wt% and 5 wt% glycerol exhibited excellent grinding performance on SiC wafers. It achieved surface roughness ( R a = 2.23 nm) significantly lower than that of conventionally cold-pressed wheel ( R a = 3.42 nm), while maintaining uniform surface free of obvious damage. Moreover, the subsurface damage layer thickness was reduced to 105.6 nm compared to 198.5 nm for the conventional wheel. The present study demonstrated that ice-templating method enabled simultaneous uniform dispersion of abrasives and controlled pore structure, thereby providing efficient tool solution for precision grinding of hard and brittle materials such as SiC.
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高影响因子
Materials
·
2025
·Vol. 18
·期 11
·2633
·
IF 3.2
Chenyang Wang,Lexiang Yin,Peng Li,Qing Huang
The incorporation of MAX phase interface layers into silicon carbide (SiC) composites has been shown to significantly enhance mechanical properties, particularly under irradiation conditions. However, conventional Ti-based MAX phases suffer from thermal instability and tend to decompose at high temperatures. In this work, an Sc2SnC coating was successfully synthesized onto the surface of SiC fibers (SiCf) via an in situ reaction between metals and pyrolytic carbon (PyC) in a molten salt environment. The PyC layer, pre-deposited by chemical vapor deposition (CVD), served as both a carbon source and a structural template. Characterization by SEM, XRD, and Raman spectroscopy confirmed the formation of Sc2SnC coatings with a distinctive hexagonal flake-like morphology, accompanied by an internal ScCxintermediate layer. By turning the Sc-to-Sn ratio in the molten salt, coatings with varied morphologies were achieved. ScCxwas identified as a critical intermediate phase in the synthesis process. The formation of numerous defects during the reaction enhanced element diffusion, resulting in preferential growth orientations and diverse grain structures in the Sc2SnC coating.
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DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Guanjie Zeng,Xiaozhong Huang,Jiyang Li,Jianling Yue,He Zhang,Xiu-Zhi Tang
Creating multifunctional materials that can serve in extreme environments is of critical importance but also a formidable challenge. Herein, we present a simple technique that combines carbothermic reduction and organic template carbonization to produce multifunctional SiC/C hybrid fabrics from inexpensive cotton mats. The obtained fabrics display high resilience to high/low temperature, anti-oxidation, and chemical assault is exhibited. Additionally, the fabric's ultralow thermal conductivity results in superior thermal insulation performance. Notably, these in situ-generated SiC nanowires considerably improve the ductility of the ceramic fabric. The compression strength and the breaking elongation increased by 39% and 2.6%, respectively, as compared to the SiC fabric without grown nanowires. When employed as an electromagnetic interference shielding material, it exhibits an excellent EMI shielding capability with a SE value of 40 dB. This research advances not just the usability of flexible ceramic fabrics in severe environments, but also the creation of fine structures in ceramic materials.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Hui Mei,Hao Li,Zhipeng Jin,Liangjun Li,Dou Yang,Chengyu Liang,Laifei Cheng,Litong Zhang
A lightweight thermal protection/insulation integrated sandwich structure for the aerospace thermal protection system (TPS) was developed with the aim of achieving superior mechanical strength and thermal insulation properties. On the one hand, the lattice frameworks of silicon carbide (SiC) ceramic thermally insulated components with body-centered lattice core (BCLC) were fabricated by selective laser sintering (SLS) 3D printing technology; on the other hand, the sol–gel process was applied to fill quartz fibers reinforced silica (Q f /SiO 2 ) aerogel into the hollow parts of the BCLCs to form a sandwich structure, thus further enhancing the mechanical and thermal insulation properties. To explore the impact of lattice core structure gradient on performance, we designed two types of BCLCs, single-layer one and double-layer one. By comparing the properties of the sandwich structures with the BCLCs, it was found that after the hot surface temperature was kept at 1000℃ for 1500 s, the backside temperature of the single-layer and double-layer sandwich structures decreased by 69.15℃ and 112.73℃, respectively, implying that the thermal insulation efficiency increased by 8.75 % and 13.85 %, respectively. Remarkably, it was precisely due to the filling of the Q f /SiO 2 aerogels that the compressive strength of the single-layer and double-layer sandwich structures reached 119.41 MPa and 35.16 MPa, respectively, which were successfully improved by 238.56 % and 256.23 %, respectively, in comparison with the BCLCs structures. Consequently, this study provides an efficient and reliable method for the preparation of thermal protection/insulation integrated components by using 3D printing technology combined with the sol–gel method, which has broader significance among academic and industrial communities.
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2022
·
IF 6.364
Hao Xiong,Anze Shui,Qingliang Shan,Mei Cai,Xiuan Xi,Bin Du
The SiO 2 layer preferentially generated on the surface of silicon carbide abrasives in Polishing Porcelain stoneware tile Residues (PPR) is corroded by silicate liquid during firing, resulting in continuous oxidation and foaming of silicon carbide, which makes the PPR difficult to be reused. The PPR is fired to form a silicate liquid that wraps micron silicon carbide in it. In this work, it is possible to study the corrosion of silicate to silicon carbide at high temperature by using two ( Ceramic-SiC ) and three ( Ceramic-SiO 2 -SiC ) layer structure model to simulate the corrosion of silicate to silicon carbide. The corrosion mechanism of SiC in PPR by silicate liquid during firing is revealed that the corrosion rate at its two sides (interfaces) determines the ultimate change in the thickness of the corrosion layer between the ceramic and the SiO 2 layer. Importantly, the corrosion layer thickness with time on the silicate-SiO 2 cross-section periodically presents wave-like changes, which can be attributed to the ionic migration between layers and the rate at which cations cross the corrosion layer when studying the three-layer model.
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高影响因子
危险品化学品经营许可证（带存储）