SURFACE & COATINGS TECHNOLOGY
·
2026
·
IF 6.1
Xin Wang,Tianyu Zhang,Zihan Zhao,Wenlong Guo,An Du,Yong Wang,Ruina Ma,Yongzhe Fan,Xue Zhao,Xiaoming Cao
Zn-Al-Mg powder co-diffusion was performed on Q235 steel using a mechanical energy-assisted diffusion process. The resulting ZAM alloy diffusion coating comprised an inner Fe Zn layer composed of δ(FeZn 10 ) and Γ(Fe 11 Zn 40 ) phases, while the outer layer exhibited a multiphase structure distributed discontinuously in island-like or dot-like patterns on the δ-phase surface. The multiphase structure exhibits layered characteristics extending outward from the δ phase: an Al-rich layer composed of Al 2 O 3 and Fe Al phases; a Mg-rich layer interwoven with Mg Al phases, Mg Zn phases, and MgO; and an amorphous ZnO layer. The growth mechanism is investigated by this study, revealing that during the primary co-diffusion phase, a 20 μm Fe Zn layer formed first on the substrate. Subsequently, increased Al atoms combined with Fe atoms within the Fe Zn phase to form an Fe Al layer, thereby inhibiting Fe Zn layer growth. Finally, active Mg atoms form a Mg-rich layer on the surface of the Fe Al layer. Mg-rich layer combines with Al atoms to form a Mg Al phase and induces lattice distortion, thereby inhibiting Fe Al layer growth. Throughout the process, the removal of HCl exposes the Fe Zn layer and restores its normal growth. Eventually, under this dynamic mechanism, a complex, multi-phase outer structure is formed. The self-corrosion current (J corr ) of the ZAM diffusion coating (1.673 × 10 −5 A/cm 2 ) markedly lower than the ZA diffusion coating (5.499 × 10 −5 A/cm 2 ). While the ZAM diffusion coating exhibited a weight gain of 1.182 ± 0.075 mg/cm 2 after 120 h of oxidation at 500 °C, which was slightly higher than the ZA diffusion coating but considerably lower than Q235 steel.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Laigang Hu,Weiwei Wang,Ling Jiang,Jinru Hu,Hongxia Zhu,Mengxue Zhang,Jian Wu,Daohui Lin,Kun Yang
Exploring CO 2 adsorption under humid conditions is crucial for practical applications. Herein, ZJU-521(Al) was synthesized using low-toxicity helical secondary building units (SBUs, [Al 5 (OH) 7 (−COO) 8 ] ∞ ) and tetrakis (4-carboxyphenyl)methane (H 4 MTTB) ligand, with excellent chemical stability. Saturated CO 2 adsorption capacities of ZJU-521(Al) reach 6.19 mmol/g at 273 K and 4.52 mmol/g at 298 K, respectively, and moderate isosteric heat of 28.23 kJ/mol, enabling low-energy regeneration. Simulation results reveal two CO 2 adsorption sites on ZJU-521(Al): site I, located near the helical SBUs and interwoven with the helical SBUs, and site II, situated near the H 4 MTTB ligand. ZJU-521(Al) can effectively separate CO 2 from the CO 2 /N 2 mixture, as identified by the ideal adsorbed solution theory values of 28.81 at 273 K and 40.83 at 298 K for CO 2 /N 2 (15/85) mixture, respectively. Dynamic adsorption experiments reveal dynamic CO 2 adsorption of 0.59 mmol/g under dry conditions and 0.54 mmol/g at 80% relative humidity (RH) for ZJU-521(Al), highlighting its moisture-resistant behavior for CO 2 adsorption under humid conditions. Most adsorbed CO 2 is readily desorbed by argon purging at 14 min (dry) and 12 min (80% RH) at 298 K, respectively. Therefore, ZJU-521(Al) emerges as a promising candidate for efficient CO 2 adsorption, separation, and desorption even under humid conditions.
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Journal of Cleaner Production
·
2021
·
IF 9.297
Aamir Hanif,Mingzhe Sun,Tianqi Wang,Shanshan Shang,Daniel C.W. Tsang,Jin Shang
NO 2 is a potent air pollutant because of its deleterious effects on human beings and other organisms. The state-of-the-art catalysis-based deNO x techniques (e.g., selective catalytic/non-catalytic reduction) are incapable of ambient NO 2 abatement due to their low efficiency at temperatures below 300 °C. It is thus conceivable to directly capture NO 2 from the atmosphere by selective adsorption on porous materials. This work reports the rational development and demonstration of the Mg–Al layered double hydroxides (LDHs) and their derived mixed metal oxides (MMO), using environmentally benign solvents , as high-capacity adsorbents for ambient NO 2 abatement. By boosting the densities of accessible basic sites using layer delamination strategies, the highest NO 2 adsorption capacity of 8.52 mmol/g was achieved by the delaminated LDH material (LDH-AM), which was substantially higher than other popular and robust adsorbents, such as zeolites (0.36–3 mmol/g) and carbon-based adsorbents (2–6 mmol/g). Using Fourier transform infrared spectroscopy and powder X-ray diffraction, it was revealed that NO 2 adsorption occurs on the surface M-OH basic sites and within the layers by simultaneously replacing the interlayer CO 3 2− ions of LDH. This work affords not only promising, durable, and scalable adsorbents for ambient NO 2 removal but also a strategy to develop adsorbents with high density of basic sites for capture of other pollutant acid gases from the environment.
研究领域:
材料科学
·
环境科学
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高影响因子
Journal of Material Cycles and Waste Management
·
2023
·Vol. 25
·期 4
·2485-2497
·
IF 3.1
Wei Jie,Liu Zhanwei,Yan Hengwei,Yang Wanzhang
Herein, fluorine fixation, nitrogen removal, and the alkaline solution recovery of alumina were studied using calcium-based high-temperature soda roasting. In addition, the effects of roasting conditions, dissolution conditions, and additives (carbon alkali and calcium salt) on fluorine fixation and alumina recovery were studied. The results show that when the roasting temperature was 1100 ℃ and the roasting time was 2 h, the dissolution temperature was 80 °C, while the dissolution time was 20 min. The ratio of soda to dross was 1.0, and 30 wt% CaCO 3 had been added as a fluorine fixing agent. The Al extraction rate from aluminum dross (AD) reached 86.21%, the denitrification rate reached 99.54%, the concentration of soluble fluoride ion was reduced to 0.111 g·L −1 , and the fluoride fixation rate was 75.04 wt%. CaF 2 is the main component of the leaching residue, which can be added as an insulation material for electrolysis. Alkaline oxidation roasting and calcium-based fluoride fixation are effective methods to separate aluminum, fluoride, and nitrogen. This study provides a new method for the safe and efficient utilization of AD.
研究领域:
化学工程
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环境科学
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材料科学
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DOI
高影响因子
COMPOSITE INTERFACES
·
2023
·
IF 2.6
Fayu Li,Jinwei Yin,Dongxu Yao,Yongfeng Xia,Hanqin Liang,Yu-Ping Zeng
The poor wettability between the ceramic reinforcements and the metal matrix makes it difficult to realize the densification process of composites, which is severely detrimental to their mechanical properties. To improve the mechanical properties of Al matrix composites (AMCs) reinforced by β-Si3N4 whiskers (β-Si3N4w), we prepare TiN coating on the surface of β-Si3N4w via molten salt process, remarkably strengthening the interface bonding between Al matrix and β-Si3N4w. By optimizing the coating layer thickness, the bending strength of AMCs reinforced by TiN-coated β-Si3N4w reaches 439 MPa at 850°C, exhibiting remarkable enhancement relative to the composites without TiN coating (335MPa). Meanwhile, the interfacial test shows that TiN-coated β-Si3N4w is well bonded with the Al matrix, and no interfacial defects were detected. Moreover, the TiN coating with appropriate thickness can efficiently alleviate the agglomeration of β-Si3N4w, promote the densification of AMCs, and modify the Al/β-Si3N4w interface.
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DOI
高影响因子
Surfaces and Interfaces
·
2026
·
IF 6.3
Yuezhong Zhang,Shiliang Jiang,Bin Li,Guoyong Wang,Shaohua Zhang,Pengpeng Wu,Baosheng Liu
Despite aluminum alloys are widely employed in concrete environments, such as in nuclear spent fuel casings and concrete formwork, they remain susceptible to severe corrosion and adhesion caused by concrete, which considerably shortens their service life. The development of low-adhesion superhydrophobic coatings offers a highly promising strategy to enhance both corrosion resistance and anti-adhesion performance. Here, a low-adhesion superhydrophobic coating is fabricated on 6061 aluminum alloy via a facile and scalable spray-coating process. A robust epoxy-based composite reinforced with hydrophobic SiO 2 and glass fibers (GF) is employed, achieving a water contact angle of 156.2°. A glass fiber skeleton interwoven with SiO 2 nanoparticle constitutes a micro‑nano hierarchical structure, which together with low surface energy established a stable Cassie–Baxter state. This hierarchical structure traps an air cushion at the interface, significantly reducing the actual contact area between corrosive media and the substrate. As a result, the coating effectively resists adhesion from both dry cement powder and wet cement slurry, demonstrating notable self-cleaning and anti-adhesion performance. Electrochemical tests conducted in simulated concrete interstitial solution showed that the low-frequency impedance modulus of the superhydrophobic coating increased by more than four orders of magnitude, with a protection efficiency of 99.85%. Moreover, the low adhesion superhydrophobic coating also possesses outstanding mechanical durability, thermal stability, and chemical stability. Therefore, the low-adhesion coating shows great potential for the durable application of aluminum alloy in concrete environment.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Deping Xia,Wei Wang,Jingzhou Liu,Hualin Lin,Sheng Han
The Mg/Al hydrotalcite with different morphologies was prepared under mild conditions through a coprecipitation process. The sulfur- and phosphorus-free MA2 nanosheets were used in combination with MoDTC to improve the low load-bearing capacity and unsatisfactory tribological properties of organic molybdenum in PAO8. Especially, the 2.0 wt % MA2 nanosheets combined with 2.0 wt % MoDTC demonstrated the highest friction performances in PAO8. The results indicated that the synergistic effect between MA2 and MoDTC contributes to the formation of a stable tribofilm composed of MoS2, MgO, Al2O3, MoO3, Fe2(SO4)3, Fe2O3, and Fe3O4. This tribofilm not only could effectively protect the friction interface and provide friction-reducing and antiwear effects but also possess high film-forming rates (PB value) and load-bearing capacity.
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高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2022
·Vol. 24
·期 8
·4925-4934
·
IF 3.945
B. Meng,Q. S. Fu,X. H. Chen,G. S. Gong,C. Chakrabarti,Y. Q. Wang,S. L. Yuan
A series of polycrystalline NiCr2−xAlxO4 (0.1 ≤ x ≤ 0.25) spinel ceramics have been synthesized using a sol–gel method. DC magnetization measurements are carried out at different temperatures and magnetic fields. A novel magnetization reversal has been observed in the field cooling process for the x = 0.2 sample, which can be ascribed to the competition between two magnetic sublattices due to their different temperature dependences. The magnetic interaction evolution, related to the complex magnetic properties, is revealed by exchange constants that have been estimated according to ferrimagnetic Curie–Weiss fitting and mean field theory. The fitting result confirmed the evolution of antiferromagnetic and ferromagnetic components with Al substitution, which is supported by the observations from the isothermal magnetization measurements. The positive and negative values of the magnetic moment can be utilized for storage applications based on the results of magnetic switching effect measurements.
研究领域:
材料科学
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磁学与磁性材料
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陶瓷
·
固体物理
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Yang Nan,Wen Li,Shaojie Li,Qi Wei,Weiping Li
Aluminum coating is a potential candidate for cadmium coating replacement due to its excellent corrosion resistance and nontoxicity. Among the fabrication methods of Al coating, plating Al via ionic liquids has drawn major attention of researchers because of the superiority of controllability, stability and low energy consumption. However, the evolution rules of plating aluminum on high-strength steel via pulse current modes at room temperature requires deeper investigation. In this work, pulse current density and pulse duty factor are regulated to reveal the plating patterns of Al on 300M high-strength steel in AlCl 3 -EMIC (2:1 in mole) ionic liquid. It is found that higher current density can significantly facilitate the nucleation of Al grains and the compactness of morphology, while an enlarged pulse duty factor tends to result in more regular Al crystals. When the current density and the pulse duty factor are fixed at 20 mA cm −2 and 80 %, the densest and most uniform aluminum coating is obtained. The component of Al coating is verified to be pure Al crystals with good adhesion and the plating process achieves a high current efficiency of 97.27 %. Under the protection of Al coating, the impedance and galvanic corrosion current density of 300M steel substrate are optimized by two orders of magnitude, and the corrosion current density is markedly decreased from 5.58 μA cm −2 to 0.77 μA cm −2 .
研究领域:
材料科学
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电化学
·
腐蚀工程
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DOI
高影响因子
Scientific Reports
·
2017
·Vol. 7
·期 1
·1-9
·
IF 4.259
Yang Fan,Kang Xiaoli,Luo Jiangshan,Yi Zao,Tang Yongjian
In this paper, a solvent/non-solvent synthetic approach has been utilized in preparing a new nanoenergetic material KClO 4 @Al/CuO by coating Al/CuO nanocomposites particles with a layer of nanoscale oxidizer KClO 4 . The coating process and mechanism are discussed. The composites of Al/CuO are uniformly mixed by mechanical ball milling process and CuO acts as a catalytic metallic oxide. The ternary mixtures KClO 4 @Al/CuO were characterized by X-ray diffraction (XRD) and the results reveal that after ball-milling and chemical synthesis process, the phase compositions haven’t changed. Scan electron microscopy (SEM) images show that these energetic nanocomposites consist of small clusters of Al/CuO that are in intimate contact with a continuous and clear-cut KClO 4 layer (100–400 nm). In a Scanning transmission electron microscopy (STEM) elemental map, high K/Cl intensity on the perimeter of the nanoparticles and high Cu/Al content in the interior powerfully demonstrated the KClO 4 @Al/CuO core-shell nanostructure. Electrical ignition experiments and pressure cell test prove that these nanoenergetic composites are more sensitive to ignition with much higher burning rate than traditional formulations (conventional counterparts). To quantify the enhancement of thermal behavior, Thermogravimetry (TG) and Differential scanning calorimetry (DSC) were performed and the results show that the burning rate of these energetic nanocomposites nearly tripled.
研究领域:
材料科学
·
含能材料
·
纳米技术
·
热分析
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高影响因子
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
·
2016
·Vol. 26
·期 1
·51-60
·
IF 1.094
Hu Jiaoyu,Liu Jun,Wang Chunxia,Tang Xin
The core/shell nano-TiN-coated Al powders (TiN/Al) were prepared and added into A356 alloy by ultrasonic-assisted casting method in this work. The results show that TiN/Al has a better dispersion in A356 matrix and a stronger strengthening effect than TiN without the core/shell structure. With the addition of TiN/Al, most of the coarse primary α-Al dendrites of A356 turn into equiaxial. After T6 heat treatment, it is found that eutectic silicon in A356 with TiN/Al becomes columnar or globular in shape and smaller in size, which causes a greatly enhanced elongation of 11.7%. The results also suggest that the addition of nanoparticles can affect the precipitation behaviors and change the shapes and sizes of the precipitation.
研究领域:
材料科学
·
金属材料
·
凝固技术
·
复合材料
·
材料加工工程
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DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2026
·
IF 3.3
Wang Jiajun,Miao Yuanyuan,Wang Peng,Tao Xiaoxia,Bo Fan,Xu Yunzhao,Zhao Lingling,Zhang Caihang,Chen Yang,Tan Li,Tsubaki Noritatsu
For the industrially promising reaction of CO 2 hydrogenation toward methanol, Cu/Zn/Al-based catalysts present a potential candidate, where the surface active structure dictates the catalytic performance, guiding ongoing research into structure–activity relationships. Herein, a series of CuZn x Al y (where the mol ratio of Zn/Cu = x , mol ratio of Al/Cu = y ) catalysts with varying compositions was synthesized via a coprecipitation method. Physicochemical characterization revealed that a small amount of Al (CuZn 0.56 Al 0.04 ) enhanced the specific surface area, improved the dispersion of Cu and Zn species, and optimized the Cu + /Cu 0 ratio, as evidenced by N 2 physisorption, XRD, and XPS analyses. In contrast, excessive Al content (CuZn 0.23 Al 0.83 ) led to a decline in surface area, pore volume, and surface exposure of active Cu and Zn species. Catalytic performance tests showed that CuZn 0.56 Al 0.04 achieved the highest CO 2 conversion (16.2%), methanol selectivity (56.3%), and methanol space–time yield (STY) (438 g MeOH kg cat −1 h −1 ), outperforming that of the commercial CuZnAl catalyst. In situ DRIFTS studies confirmed that methanol synthesis proceeded via a formate (HCOO) mediated pathway, with the optimal catalyst demonstrating superior efficiency in converting key intermediates (HCO 3 *, CO 3 *, HCOO*) to the final product. The study establishes that tailored Al content is crucial for modulating catalyst surface properties and ultimately promoting catalytic performance for methanol synthesis from CO 2 . Graphical abstract An optimal Al content in co-precipitated CuZn x Al y catalysts optimizes the surface active structure, enabling efficient CO 2 -to-methanol hydrogenation via the formate pathway.
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