Membranes
·
2024
·Vol. 14
·期 5
·117
·
IF 3.3
Yuqi Song,Kai Miao,Jinxin Liu,Yutang Kang,Dong Zou,Zhaoxiang Zhong
Membrane distillation (MD) is considered a promising technology for desalination. In the MD process, membrane pores are easily contaminated and wetted, which will degrade the permeate flux and salt rejection of the membrane. In this work, SiC ceramic membranes were used as the supports, and an Al2O3micro-nano structure was constructed on its surface. The surface energy of Al2O3@SiC micro-nano composite membranes was reduced by organosilane grafting modification. The effective deposition of Al2O3nanoflowers on the membrane surface increased membrane roughness and enhanced the anti-fouling and anti-wetting properties of the membranes. Simultaneously, the presence of nanoflowers also regulated the pore structures and thus decreased the membrane pore size. In addition, the effects of Al2(SO4)3concentration and sintering temperature on the surface morphology and performance of the membranes were investigated in detail. It was demonstrated that the water contact angle of the resulting membrane was 152.4°, which was higher than that of the pristine membrane (138.8°). In the treatment of saline water containing 35 g/L of NaCl, the permeate flux was about 11.1 kg⋅m−2⋅h−1and the salt rejection was above 99.9%. Note that the pristine ceramic membrane cannot be employed for MD due to its larger membrane pore size. This work provides a new method for preparing superhydrophobic ceramic membranes for MD.
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DOI
PubMed
高影响因子
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
·
2024
·Vol. 31
·期 6
·1502-1513
·
IF 3.1
Yang Bo-lin,Kuang Chang-liu,Liu Zheng-long,Yu Chao,Deng Cheng-ji,Ding Jun
ZrB 2 -based ceramic composites were prepared by spark plasma sintering using ZrB 2 powder prepared by molten salt method as raw material and SiC and nano-graphite as additives. The effects of nano-graphite addition on the physical properties and oxidation resistance of ZrB 2 -based ceramic samples were investigated. The results show that the addition of an appropriate amount of nano-graphite can effectively improve the density of ZrB 2 -based ceramic composites and improve the physical properties of the materials. The flexural strength of the ceramic sample with 8 vol.% nano-graphite reached 418.54 MPa, which was 53.14% higher than that of ZrB 2 –SiC ceramic material (273.31 MPa), and its oxidation resistance was also significantly improved. It demonstrats that the addition of an appropriate amount of nano-graphite can effectively improve the physical properties and oxidation resistance of ZrB 2 –SiC ceramic composites. Via prolonging its service life in application and promoting the development of ZrB 2 -based ceramic composites, it is of great significance for clean steel smelting.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Zijian Zhang,Xinbo He,Tao Zhang,Hongda Guan,Xuanhui Qu
The infiltration has the advantages of high efficiency and near net forming, making it the mainstream method for preparing diamond/SiC composite. However, no pressure was applied during the infiltration and the SiC matrix originated from the silicon-carbon reaction, resulting in a low diamond content and a large amount of residual silicon. This makes it difficult to further improve the properties of the composite, especially the thermal conductivity. Therefore, reaction bonded SiC (RB-SiC) was proposed as the matrix to reduce silicon content, and composition design was carried out to obtain high content of diamond. The results showed that in the prepared composite, the diamond content (61.14 vol%) reached the theoretical maximum of 90.43 %, and the silicon is only 4.79 vol%. Therefore, the thermal conductivity of composite can reach up to 665.47 W/mK. In addition, the influence of SiC particle size on phase composition, microstructure, and properties was analyzed.
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高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Hui Huang,Xiaowu Chen,Jinshan Yang,Xiangyu Zhang,Yanmei Kan,Han Luo,Xiao You,Zhiliang Hong,Shaoming Dong
The corrosion resistance of Y-Al diffused SiC ceramics (SiC-Al40Y) at 1100–1300 °C was investigated. The results show that the weight gain curves comply with the parabolic fitting formula, then the oxidation rate constant and the activation energy were calculated to be 1.653 × 10 −5 (1100 °C), 3.704 × 10 −5 (1200 °C), 9.306 × 10 −5 (1300 °C) mg 2 /cm 4 s and 154.7 kJ/mol. Compared with reported SiC (41–147 kJ/mol), the higher activation energy indicates the better corrosion-resistant performance. And it is found that the Y-Al diffusion layers can be transformed to corrosion-resistant YAlSi x O y layers under corrosive atmosphere. Eventually, based on experimental results, the corrosion-resistant mechanism is analyzed: chemical potential gradient caused by preferential oxidation of Y-Al prompts the immigration of Y-Al from matrix to surface, gradually forming a continuous Y/Al-silicate layer on the surface and thus can hinder the further corrosion of H 2 O, O 2 .
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Small
·
2025
·
IF 12.1
Pengzhan Yang,Nian Li,Wei Guo,Zheng Zhang,Shudong Zhang,Jin Zhong Zhang,Zhenyang Wang
To endure extreme conditions, silica fiber aerogels are expected to maintain ultralow thermal conductivity at high temperatures. However, the weak infrared extinction capacity of SiO 2 fiber aerogels fails to effectively suppress thermal radiation, resulting in high thermal conductivity at high temperatures. Here, SiO 2 -air-SiC fibers with high extinction shells, air interlayer, and amorphous core are fabricated by low-pressure carbothermal reduction. Owing to low pressure conditions that reduce Gibbs free energy of the reaction and increase the diffusion rate of the gas molecules, the reaction can occur in seconds. With the mitigation of thermal radiation by the incorporation of SiC shell with high extinction capacity and the weakening of gas-phase heat conduction in air interlayer generated by reaction below the mean free path of gas (70 nm), the aerogel shows ultralow thermal conductivity in a wide temperature range (the thermal conductivity at 1000 °C is 0.108 W m −1 K −1 ). Meanwhile, the ultra-fast reaction rate ensures the amorphous structure of silica core, which can maintain the flexibility of the aerogel by triggering the shear band (up to 80% elastic compressive strain and bending recovery property). The combination of high-temperature thermal insulation and high flexibility shows good potential for thermal insulation applications under extreme conditions.
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Chong Shan,Zhiwei He,Erxi Wang,Xiaohui Zhao,Zhan Sui,Jianjun Cao
A biomimetic superhydrophobic surface was fabricated on single-crystal 4H-SiC using a two-step femtosecond laser processing strategy followed by surface silanization. Drawing inspiration from the micro/nanostructures of butterfly wings and shark skin, a hybrid hierarchical architecture was engineered by first generating microscale grid patterns and then inscribing small grooves within each grid cell. This morphology significantly enhanced surface roughness and provided the structural basis for wettability modulation. Systematic characterization revealed that laser-induced oxidation introduced abundant polar functional groups, resulting in superhydrophilicity, which was subsequently converted into superhydrophobicity (water contact angle ∼ 154°) via octyltriethoxysilane (OTES) modification. The resulting surface exhibited excellent robustness to processing parameters, with superhydrophobicity achieved across a wide range of laser powers (30–110 mW) and grid spacings (50–150 μ m ). EDS and XPS analyses confirmed the transformation of polar oxide species into nonpolar chemical groups following modification. Functional demonstrations showed that the fabricated surface possessed strong self-cleaning and anti-icing capabilities, with water droplets rapidly rolling off to remove contaminants and delaying ice nucleation by over threefold compared to untreated SiC. This work provides a scalable, maskless, and environmentally friendly approach to functionalize SiC surfaces, paving the way for their application in harsh environments such as aerospace, microfluidics, and power electronics.
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JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Jinfang Zhang,Panpan Li,Kaili Mao,Xindan Zhang,Rusheng Wei,Xiaofeng Li
Solid-state lithium metal batteries (SSLMBs) have emerged as promising next-generation energy storage systems, distinguished by their superior safety profile and energy density. While polyethylene oxide (PEO)-based solid polymer electrolytes (SPEs) offer notable advantages including inherent safety and manufacturing simplicity, their practical implementation in SSLMBs remains challenged by insufficient ionic conductivity and poor electrode-electrolyte interface compatibility. This investigation presents a dual-stage surface engineering strategy involving the hydroxylation of SiC and the chemical grafting of 3-(trimethoxysilyl)propyl acrylate (TPA) onto hydroxylated SiC nanoparticles, creating SiC-g-TPA hybrid fillers for PEO-based composite electrolytes. The covalent integration of TPA moieties with SiC nanoparticles improved nanofiller dispersion homogeneity within the PEO matrix, effectively suppressing polymer crystallinity while enhancing Li + transport. Furthermore, the engineered SiC-g-TPA architecture leverages abundant surface hydroxyl groups as Lewis acid sites, which synergistically interact with TFSI - anions through hydrogen-bonding. Consequently, both enhanced ionic conductivity of 2.59×10 -3 S cm -1 and an elevated Li + transference number of 0.48 were achieved at 80 °C for the PEO/SiC-g-TPA SPE, along with a wide electrochemical stability window of 5.46 V and stable constant current polarization over 600 h. Assembled LFP//Li cells employing this SPE exhibit a dendrite-free Li metal surface, excellent rate capability and cycling stability with initial discharge capacity of 150.1 mAh g -1 at 0.5 C and 142.9 mAh g -1 at 1 C as well as long cycling life over 200 cycles.
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JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·
IF 3.8
Tao Luo,Jinsheng Ye,Wenyan Huang,Ke Li,Yufan Wu,Yeqi Zhu,Siqi Lan,Shengjian Mao,Zhichao Xue,Rongqian Yao
Aimed at making SiC-based composites for thermal protection components to catch up with the increasing Mach number of hypersonic vehicles, a facile strategy is proposed to fabricate lightweight SiC(Zr, rGO) nanocomposite polymer-derived ceramics (PDCs). The key technique is repyrolyzing SiC(Zr, rGO) p /polyzirconocarbosilane–vinyltriethoxysilane–graphene oxide (PZCS–VTES–GO, PZVG) blends. Highly cross-linked PZVG can effectively optimize formability of precursors, and in-situ formed Zr-containing phases are beneficial in preventing further grain growth of β-SiC and improving bonding strength within ceramic network. More interestingly, ZrOSi transition zone tightly coupled with nanocrystals helps to increase structure disorder of amorphous ceramic matrix to tough nanocomposite structure. Particularly, SiC(Zr, rGO) 1300 nanocomposite PDCs own outstanding hardness (8.10 GPa), superior fracture toughness (3.84 MPa·m 1/2 ), high ceramic yield (92.60%), and low linear shrinkage (5.00%). Zr-modification enables them to retain favorable overall performances even after 60 min of oxidation under a 1300°C butane torch flame. Timely self-healing ZrO 2 (ZrSiO 4 )/SiO 2 protective layer can enhance high-temperature oxidation resistance. Meanwhile, ZrO 2 and ZrC have a unique combination of good high-temperature stability/resistance to corrosion, strongly improving structural integrality. As demonstrated, such in-situ construction of nanocomposite system and pyrolytic mechanism open new opportunities for obtaining PDCs with superior high-temperature ablation resistance, toward emerging uses in thermal protection system of hypersonic aerospace vehicles.
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Surfaces and Interfaces
·
2025
·
IF 6.3
Juze Xie,Yangting Ou,Jiawen Yao,Tianxin Luan,Taosheng Zhang,Zhehan Li,Chufeng Sun,Jisheng Pan
The chemical mechanical polishing (CMP) of single-crystal silicon carbide (SiC) faces challenges such as low efficiency and limited service life of the polishing liquid. To address these issues, we encapsulated the Fenton reaction catalyst FeSO 4 within melaminated formaldehyde (MF) resin via in-situ polymerization to form microcapsules. During processing, when these microcapsules come into contact with the workpiece surface, they release Fe 2+ ions that participate in the reaction, generating highly oxidizing species that promote efficient interfacial chemical reactions. Compared with other catalysts like Fe 3 O 4 and Fe-C composites, FeSO 4 exists in the polishing slurry as Fe 2+ , which significantly enhances the efficiency of the Fenton reaction. This study systematically investigates the effects of various process parameters (water-oil ratio, stirring rate, core-wall ratio) on the morphology and particle size distribution of FeSO 4 microcapsules. The results demonstrate that under conditions of a water-oil ratio of 1:25, a stirring rate of 450 rpm, and a core-wall ratio of 1:2, the prepared microcapsules exhibit smooth surfaces, uniform particle sizes, and excellent dispersion properties. When the core-wall ratio decreases from 1:1 to 1:3, the permeation resistance of the microcapsules increases by approximately 1.5 times. Fourier Transform Infrared spectroscopy (FT-IR) confirms the encapsulation of FeSO 4 within MF resin. Thermogravimetric analysis (TGA) reveals the good thermal stability of the microcapsules. Friction and wear test results indicate that the wear area under FeSO 4 microcapsule conditions is 12.491 μm², representing a 30 % increase in material removal rate compared to traditional Fenton reaction catalysts.
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SURFACE & COATINGS TECHNOLOGY
·
2025
·
IF 6.1
Jingsi Wang,Shuang Liu,Guibin Lou,Ya Chen,Haozhe Pang,Yachao Song,Syed Mesum Raza Naqvi,Kai Zhou,Zongjun Tian,Muhammad Ali Nasir,Dongsheng Wang,Lida Shen
High infrared emissivity coatings have important engineering value in aerospace and electronic devices. In this study, a new method for preparing high infrared emissivity coatings using magnetic field-assisted jet electrodeposition was prepared. The magnetic field-assisted jet electrodeposition technique can be used to prepare coatings with rough structures, and the infrared emissivity of nickel particle coatings can reach 0.80 at a magnetic field intensity of 100 mT, which is significantly improved compared with the nickel coatings (0.155) prepared by conventional electrodeposition. A nickel-based SiC composite coating with high infrared emissivity was prepared by combining magnetic field-assisted jet electrodeposition with SiC particles. Compared with the nickel particle coating, the infrared emissivity of the nickel-based SiC composite coating is further improved. At a concentration of 6 g/L SiC particles, the infrared emissivity of the nickel-based SiC composite coating reached 0.94. The synergistic effect of magnetic field-assisted jet electrodeposition and SiC particles can realize the nickel coatings into coatings with high infrared emissivity.
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高影响因子
POLYMER COMPOSITES
·
2025
·
IF 4.7
Yuting Qiu,Qingnan Meng,Chi Zhang,Mu Yuan,Xinyue Mao,Sifan Wang,Shiyin Huang
In this study, a wear-resistant epoxy resin (EP) composite coating incorporating surface-modified silicon carbide (SiC) particles was developed. The SiC particles were functionalized through sequential thermal oxidation and silane coupling agent (KH550) modification to yield SiC@SiO 2 -KH550 hybrid fillers. The influence of filler addition and content on the tribological properties was investigated with a pin-on-disk wear tester, whereas the wear morphology was analyzed by scanning electron microscopy (SEM). The results indicate that the neat EP coatings primarily exhibit an adhesive wear mechanism, whereas the composite coatings show a mixed wear mechanism involving adhesion, abrasion, and delamination. The composite coating with 20 wt% SiC@SiO 2 -KH550 filler achieved optimal tribological performance, with reductions in wear rate by 80% and 26% compared to neat EP and unmodified SiC/EP systems, respectively. The enhanced wear resistance is mainly attributed to the modified SiC particles, which promote the formation of transfer films with excellent mechanical properties and a larger area ratio through improved interfacial bonding and dispersion.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Rui Li,Dong Zou,Jinxin Liu,Zhaoxiang Zhong,Weihong Xing
High-temperature gas-solid separation applications demand ceramic membranes with both exceptional mechanical integrity and superior gas permeance, yet conventional processing methods struggle to achieve this balance due to inherent trade-offs between porosity and strength. To address this challenge, a novel emulsion-templating approach was developed for fabricating lightweight porous silicon carbide ceramic membranes (PSCM) with controlled pore architecture and enhanced transport properties. The fabrication strategy employed oil-in-water emulsions stabilized by Tween 80 surfactant, where systematic optimization of surfactant concentration, solid content, and oil-to-water ratios enabled precise control over droplet size and final pore structure. Comprehensive characterization revealed that optimal processing conditions (55 wt% solid content, 1200 °C sintering) produced membranes with 78.5 % porosity and robust flexural strength, and exceptional gas permeance of 188.6 m 3 ·m −2 ·h −1 ·kPa −1 . Performance benchmarking demonstrated superior Darcy’ permeability coefficients compared to conventional porous ceramics at similar porosity levels. High-temperature dust filtration testing at 300 °C using 0.3 μm alumina particles achieved 99.99 % removal efficiency with moderate pressure drop, while long-term stability evaluation confirmed excellent regeneration capability through pulse cleaning cycles. The emulsion-templating methodology successfully overcomes traditional processing limitations, enabling simultaneous optimization of mechanical integrity and transport efficiency for demanding industrial gas cleaning applications.
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