CERAMICS INTERNATIONAL
·
2026
·
IF 6
Zhan-jun Yang,Mi Li,Yan-Bo Cao,Yi Wu,Qiang Xu
This study addresses the issues of the limited contact interface between the fuel and the oxidizer. A strategy for simultaneously optimizing the formulation design and the preparation process was proposed. Three types of fuels - pure aluminum, aluminum-magnesium alloy, and aluminum-silicon alloy - were selected, and polyvinylidene fluoride (PVDF) was used as the binder. Six groups of thermal reaction samples were prepared by two methods: physical mixing (PM) and electrostatic spray atomization (ES). The microstructure, combustion characteristics, thermal behavior, and product composition of the samples were systematically studied using scanning electron microscopy, X-ray diffraction, high-speed photography, infrared thermal imaging, and synchronous thermal analysis. The results showed that the alloy fuels affected the later stage of the reaction by altering the melting behavior and surface oxide layer characteristics, while electrostatic spray atomization played a key role in the early stage, functioning by shortening the mass transfer distance and enhancing the “pre-ignition” effect of polyvinylidene fluoride. The coupling of fuel formulation and preparation process enables differential modulation of the combustion performance of Al/CuO thermites. This study provides an effective strategy for developing high-performance aluminum-based thermite materials.
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JOURNAL OF NUCLEAR MATERIALS
·
2026
·
IF 3.3
Yuting Rao,Xiangju Liu,Chengtao Li,Qianwu Li,Qingliang Lv,Quantong Jiang,Nazhen Liu
B 4 C/Al neutron absorber materials are critical for the criticality safety of spent nuclear fuel wet storage, yet their corrosion-induced degradation poses a significant challenge to long-term operational reliability. This study systematically investigated the corrosion behavior and failure mechanism of a commercial B 4 C/Al composite during long-term immersion in a simulated spent fuel pool environment (2700 ppm boric acid at 40°C) via microstructural characterization and electrochemical analyses. Results indicate that the corrosion product layer exhibits a decelerating growth trend, and is mainly composed of non-protective aluminum oxides and hydroxides. Scanning kelvin probe (SKP) and in-situ scanning vibrating electrode technique (SVET) mapping revealed that preferential corrosion occurs at the interface, driven by the micro-galvanic coupling between the noble B 4 C particles (micro-cathodes) and the active Al matrix (micro-anodes). The rapid interfacial dissolution undermines the matrix support, causing the neutron-absorbing B 4 C particles to undergo mechanical loosening and detach along with the shedding of the loose corrosion product layer, thereby posing a potential risk to the material’s functional performance.
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COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2025
·
IF 8.9
Tian-Hao Xu,Xiang-Yu Meng,Song Shen,Guo-Chao Mo,Ping Shen
Inspired by natural hierarchical structures, this study presents a novel biomimetic Al/Al 2 O 3 composite featuring a gradient-heterogeneous architecture that effectively addresses the long-standing strength–toughness trade-off in metal–ceramic systems. A high-resolution vat photopolymerization 3D printing process was used to fabricate complex ceramic scaffolds with a multi-scale design, incorporating a turtle shell-inspired gradient in porosity and wall thickness, along with layered, tubular, and hexagonal cellular units derived respectively from nacre, ram horns, and beehives. Through pressure infiltration of molten aluminum, a fully interpenetrating composite with strong interfacial bonding was achieved. The resulting material exhibits a spatially tailored gradient in mechanical properties, achieving a surface strength of 634 MPa and a core energy absorption capacity of 14.36 MJ/cm 3 . In situ mechanical testing and finite element analysis reveal that multi-scale synergistic toughening mechanisms—including architecture-guided crack deflection, distributed plastic deformation, and stress redistribution—collectively contribute to the enhanced performance. This work demonstrates the potential of additive manufacturing-enabled structural programming to engineer composites with spatially optimized mechanical properties, offering a new paradigm for the design of advanced structural materials.
研究领域:
材料科学
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复合材料
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增材制造
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机械工程
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断裂力学
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Ran Zhang,Shangjie Zhao,Qianxi Li,Ke Wang,Ke Zhang,Xiaofan Ding,Jing Zhao,Songtao Xiao
Thorium ions, known for their elevated toxicity and radioactivity, pose substantial ecological hazards, highlighting the need for efficient technologies to selectively eliminate them from water. The solid adsorption approach has gained widespread use in removing thorium ions because of its notable effectiveness, convenience, and straightforward operation. The key to this method’s success is the solid-phase adsorbent, underscoring the pressing need to develop exceptionally efficient adsorbents for thorium ion removal. Here, we present a novel in situ synthesis approach for enhancing an aluminum-based Metal-Organic Framework (Al-MOF) through the incorporation of iron oxide (Fe 3 O 4 ). The resulting Fe 3 O 4 /Al-MOF composite adsorbent demonstrates exceptional performance: (a) unparalleled adsorption capacity, achieving a remarkable Th(IV) uptake of 3058.0 mg g −1 , significantly outperforming the unmodified Al-MOF (1324.6 mg g −1 ); (b) outstanding selectivity, exhibiting high specificity for Th(IV) adsorption (SF Th/metals > 1000); (c) superb reusability, with excellent regeneration capabilities (85 % retention after 6 cycles). Through combined FT-IR and XPS analyses, we confirm that carboxylate oxygen atoms and Fe-O adsorption sites are key contributors to the Th(IV) adsorption mechanism. This work advances the design of efficient MOF-based composite adsorbents through valuable insights.
研究领域:
环境科学
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材料化学
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放射化学
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水处理
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吸附技术
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高影响因子
FUEL PROCESSING TECHNOLOGY
·
2025
·
IF 7.7
Mengxiong Li,Chuxiang Sun,Qingyu Li,Qingchun Yang,Hongxin Wang,Xu Xu
This research investigates the combustion behavior of aluminum and boron loaded gel fuel droplets (10–20 wt%) under high-temperature and high-pressure conditions. High-speed and color imaging captured the combustion process. The addition of gellant induces micro-explosions that enhance the burning rate; however, increasing particle concentration weakens this effect. At high concentrations, early particle shell formation hinders gel layer development, suppressing micro-explosions. Both micro-explosions and particle shells promote liquid-phase combustion. At low concentrations, micro-explosions dominate the enhancement, while at high concentrations, larger, early-formed particle shells are the primary contributor. Increasing ambient pressure reduces micro-explosion intensity but shortens ignition delay and raises the burning rate. Under high pressure, weak micro-explosions offer less enhancement and lead to larger particle agglomerates. Aluminum and boron gel droplets show similar liquid-phase behavior, but differ in particle combustion: aluminum ignites under all conditions, while boron requires higher pressures. The combustion process of high-concentration gel droplets under elevated conditions is divided into four stages: Stable Combustion, Particle Shell Formation, Particle Agglomerate Ignition, and Molten Particle Combustion. This staged model emphasizes the dominant role of particle shells, with minor contributions from micro-explosions.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Buhao Zheng,Bonan Gu,Qizhen Zhang,Jingxin Li,Changkun Song,Dihua Ouyang,Wenchao Zhang
Liquid metals offer a unique paradigm for modulating the performance of energetic materials due to their exceptional physicochemical properties. In this study, a novel strategy to enhance the reactivity of Al/MoO 3 thermite by incorporating liquid metal Ga was systematically investigated. Micro-scale Ga particles and Al Ga composite particles were successfully prepared via a surfactant-assisted ultrasonic dispersion method, which effectively inhibited the coalescence of liquid Ga and enabled uniform distribution within the thermite. The results demonstrated that the Ga-containing thermite exhibited excellent performance in key parameters including heat release, ignition, and combustion characteristics. Even with Ga addition accounting for only 5% of the Al mass, the AlGa5/MoO 3 thermite exhibited a 6.6% enhancement in heat release to 4023 J/g, a 29% reduction in ignition delay time to 0.72 ms, a 35% increase in burning rate to 10.2 m /s, and a 5.7% rise in peak flame temperature to 2562 °C, all compared to the baseline Al/MoO 3 thermite. Post-combustion characterization confirmed the formation of a Ga Mo intermetallic compound, which demonstrates that Ga primarily acts as a mediator by forming rapid heat-transfer channels. The findings underscore the immense potential of liquid metals as versatile additives for designing next-generation energetic materials with tailored ignition and combustion properties.
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FirePhysChem
·
2023
·
IF 0
Jun Wang,Jie Chen,Wei Cao
Introducing additional oxidizers in aluminized explosives is an effective way to improve energy performance by enhancing the secondary combustion reaction. In this work, perfluorocarbon as oxidizer has been introduced into TATB/Al based energetic materials to improve combustion reaction and energy output performance. The uniform TATB/Al/perfluorocarbon composites are prepared through acoustic resonance mixed technology, and the energy and pressure output performance are fully studied in air blast and underwater explosion. A significantly exothermic peak derived from the reaction between fluorine and Al is observed between 540 and 580℃ for TATB/Al/perfluorocarbon. The heat of explosion of TATB/Al/perfluorocarbon is increased first and then decreased with F/Al ratio from 0 to 0.608. The highest heat of explosion is 6021 J/g for TATB/Al/perfluorocarbon with F/Al ratio of 0.274. Furthermore, the enhanced working capacity, the significantly enlarged fireball and relatively high overpressure are obtained for TATB/Al/perfluorocarbon. More importantly, the shock impulse and first bubble oscillation time of TATB/Al/perfluorocarbon have been increased by 23.2% and 21.18% during underwater explosion, respectively. The results further illustrate that adding perfluorocarbon is a feasible approach to enhance energy output due to combustion reaction between fluorine and Al, which can be applied in explosives and propellants.
研究领域:
化学工程
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材料科学
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爆炸力学
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MATERIALS CHEMISTRY AND PHYSICS
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2022
·
IF 4.778
Qingsong Deng,Zhou Gong,Wenjie Mou,Zhenmin Wang,Zhengchao Xie,Yukun Chen
Nowadays, metal-polymer composites are used to reduce automobile's weight. However, welding nonpolar polymers to metals is difficult due to the lack of polar groups in molecular chains . The paper put forward an innovative strategy to solve this problem: by adding magnesium methacrylate (MDMA) changes the physical and chemical properties of polypropylene (PP)/ethylene-propylene-diene terpolymer (EPDM) TPV, which improves the compatibility of TPVs and metals. Moreover, the simulation experiments are carried out on plate vulcanization machine. It is found that the addition dosage and order of MDMA have a certain effect on the welding strength . Furthermore, friction stir welding (FSW) replicates the results of simulation experiments, and the ultimate tensile shear strength of P7-E3M1/aluminum alloy (AA6061-T6) reaches 24 MPa. Finally, the welding strength variation regularity with time shows that the properties of metal-TPVs become stable after 10 days. This work introduces a feasible and effective strategy that can be applied to weld various metals to polymers.
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CATALYSIS TODAY
·
2022
·
IF 6.562
Bin Kang,Ming Li,Zhaoying Di,Xiaonan Guo,Ying Wei,Jingbo Jia,Runduo Zhang
Series of ZSM-5 zeolites with diverse contents and locations of Al pairs were synthesized, and Co 2+ ions were subsequently anchored at the Al pairs of ZSM-5 zeolites by wet ion-exchange with H protons. The Co-ZSM-5 sample derived from the mixtures of AlCl 3 and TEOS of Si/Al=30.3 showed the best de N 2 O performance. Analysis on Co (Ⅱ) ion exchange capacity demonstrated the content of Al pairs followed the sequence: AlCl 3 (0.84) > Al(NO 3 ) 3 (0.73) > aluminum isopropoxide (0.65) and TEOS (0.84) > silicic acid (0.57). More Al pairs coordinated with protons or cobalt ions were essentially associated with better performances for N 2 O catalytic dissociation. Moreover, Si source had a significant effect on the location of Al pairs determined by UV–vis–DRS of bare Co (Ⅱ), Al pairs of ZSM-5 zeolite synthesized from TEOS were enriched in the sinusoidal channel (γ site), whereas those synthesized from silicic acid were concentrated in the channel intersections (6-MRs β site). The theoretical calculation revealed that the O 2 desorption at γ-site Co 2+ of ZSM-5 zeolite required to overcome less energy barrier (23.8 kcal/mol) than that at β-site one.
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JOURNAL OF RARE EARTHS
·
2016
·Vol. 34
·期 4
·428-434
·
IF 2.188
Hao TANG,Hui DENG,Qingbo REN,Dingzhou CAI,Yiming REN,Lang SHAO,Yongde YAN,Milin ZHANG
The electrochemical behavior of Pr(III) and formation process of Pr-Al intermetallics were investigated by different electrochemical methods. The reduction of Pr(III) ion to metallic Pr is an one-step three-electrons reaction. The reversibility of Pr(III)/Pr(0) system was evaluated by cyclic voltammograms with different scan rates. The co-reduction of Pr(III) and Al(III) ions formed three different Pr-Al intermetallics at electrode potentials around −1.40, −1.80, and −1.95 V vs. Ag/AgCl at 723 K, respectively. Open-circuit chronopotentiometry and electromotive force (emf) measurements were carried out to estimate the relative molar Gibbs energies of Pr for the formation of different Pr-Al intermetallics in the temperature range of 723–843 K. The activities of Pr in the Pr-Al intermetallic compounds were calculated.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2022
·
IF 3.428
Yan Fu,Ye Li,Jun Zhang,Dongxue Liu,Chang Liu,Yi Ke
Antimony is a new type of pollutant with potential toxicity and carcinogenicity. Therefore, the restoration of antimony-contaminated water has attracted wide attention from all over the world. In this research, we synthesized chloride intercalated Ni-Al layered double hydroxide (Ni-Al LDH) with a good laminated structure by co-precipitation and ion exchange. We investigated the adsorption performance of Ni-Al LDH for Sb(V) in a one-component system for the first time through a series of batch experiments. The effect of key process variables, such as pH, reaction temperature, adsorbent dosage, contact time and initial concentration on the adsorption was studied in single-factor experiments separately. The reaction rapidly reached adsorption equilibrium within 30 min and it maintained the antimony removal rate at about 91% at the optimum reaction conditions. Multiple models were applied to fit the adsorption isotherm, kinetic and thermodynamic data to describe the adsorption behaviors of Sb(V) on Ni-Al LDH. A perfect fit between the Langmuir model and isothermal adsorption experimental data confirmed a maximum adsorption capacity of material could be up to 142.86 mg/g. SEM-EDS, XPS, and other characterization analyses demonstrated that ion exchange and ligand exchange are the primary mechanisms for triggering the adsorption process. It proved the excellent regeneration performance of the material by data from five stable adsorption/desorption cycles. It could be demonstrated that Ni-Al LDH could be an applicable adsorbent for the removal of Sb(V) .
研究领域:
环境科学
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材料化学
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水处理
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吸附技术
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污染物去除
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Chuandong Wu,Jian Zhang,Guoqiang Luo,Qiang Shen,Zhanghua Gan,Jing Liu,Lianmeng Zhang
To provide insight into interfacial segregation and precipitates behavior in the ultrafine grained Al-based metal matrix composites , AA7075/B 4 C composite was selected as the model system. The bulk composite was synthesized via cryomilling, field assistant sintering and followed heat treatment. The segregation layer of MgO was observed to increase from ∼15 nm to 20–25 nm during heat treatment due to faster solute diffusion caused by the Al/B 4 C interface and large volume fraction of grain boundaries. In addition to the segregation, representative TEM results show that the spherical GP zone and platelet η′ precipitates distribute in grain interior, while several coarser η precipitates located at LAGB and HAGB with the orientation relationship of (0001)//(1 1 ( _ ) 1) and [10 1 ( _ ) 0] η //[110] Al . However, the precipitates at LAGB exhibit finer size relative to those at HAGB, which could be ascribed to the higher accumulation of solute atoms at HAGB to favor the growth and coarsening of the precipitation during heat treatment.
研究领域:
材料科学
·
金属基复合材料
·
微观组织演化
·
物理冶金
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高影响因子
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