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Dry-ball-milling-assisted activation of tungsten‑molybdenum tailings and coal bottom ash: Enhancing the co-utilization into sustainable alkaline aluminosilicate binders 干球磨辅助活化钨钼尾矿和煤底灰:促进其协同利用成为可持续碱性硅酸铝粘结剂
IF 2.7 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2026-04-15 Epub Date: 2026-02-07 DOI: 10.1016/j.matlet.2026.140233
Georgy Lazorenko , Alexander Kruglikov , Vladimir Mokichev , Anton Kasprzhitskii
This study explores the dry ball milling activation of tungsten‑molybdenum tailings (TMT) and coal bottom ash (CBA) to enhance their reactivity for use in alkali-activated aluminosilicate binders. CBA-TMT mixture was activated at varying rotational speeds and durations to assess the effects on microstructure, phase composition, and the mechanical performance of the resulting binders. The optimal regime (450 rpm, 30 min) yielded a binder with a compressive strength of 52 MPa. This enhancement is attributed to significant particle size reduction, increased defect density, and surface amorphization, which synergistically enhanced the dissolution of aluminosilicate and Ca-bearing phases. The findings demonstrate that dry co-milling is an efficient, low-energy approach for activating industrial by-products, facilitating the production of sustainable high-performance cementitious materials.
本研究探讨了对钨钼尾矿(TMT)和煤底灰(CBA)进行干球磨活化,以提高它们在碱活化铝硅酸盐粘结剂中的反应性。CBA-TMT混合物在不同的转速和持续时间下被激活,以评估对所得粘合剂的微观结构、相组成和机械性能的影响。最佳工艺流程(450rpm, 30min)可获得抗压强度为52mpa的粘结剂。这种增强归因于显著的颗粒尺寸减小、缺陷密度增加和表面非晶化,这协同增强了铝硅酸盐和含钙相的溶解。研究结果表明,干式共磨是一种高效、低能耗的方法,可以激活工业副产品,促进可持续高性能胶凝材料的生产。
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引用次数: 0
Tailoring carbide precipitation to achieve strength-toughness balance of a low alloy ultra-high strength heavy-gauge hydropower steel 剪裁碳化物析出,实现低合金超高强度大规格水电钢的强韧平衡
IF 2.7 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2026-04-15 Epub Date: 2026-02-08 DOI: 10.1016/j.matlet.2026.140223
X.J. Sun , G.Y. Liu , Z.J. Xie , S. Feng , X.L. Wang , C.J. Shang
This work elucidates the temperature-dependent carbide precipitation mechanisms governing the strength–toughness balance of a low alloy 950 MPa grade heavy-gauge hydropower steel. By systematically correlating tempering temperature with microstructural evolution and mechanical response, an unconventional strengthening–toughening synergy is revealed. Tempering at 550 °C provided an increase of ∼100 MPa in yield strength but caused a slight deterioration in toughness at −60 °C compared with the as-quenched condition. However, tempering at 620 °C simultaneously enhanced yield strength by ∼50 MPa and significantly improved toughness from ∼56 J to ∼143 J. Quantitative transmission electron microscopy (TEM) demonstrated that these distinct mechanical responses originate from differences in carbide morphology and size-distribution. In 550-tempered sample, carbides predominantly exhibited an acicular morphology and an average length of ∼94.3 nm (maximum at ∼500 nm), aligning along three crystallographically directions. Tempering at 620 °C transformed the carbides into uniformly dispersed short rod-shaped precipitates with lengths of 30–50 nm. This transition suppressed brittle crack initiation while maintaining precipitation strengthening, providing synergistic improvement in strength and toughness. The findings offer new insights into carbide-controlled toughening strategies for ultra-high-strength heavy-gauge steels in hydropower applications.
本研究阐明了一种950 MPa级低合金重型水电钢的碳化物析出机制。通过系统地将回火温度与微观组织演变和力学响应相关联,揭示了一种非常规的强化-增韧协同作用。与淬火状态相比,在550℃回火时屈服强度增加了~ 100 MPa,但在- 60℃回火时韧性略有下降。然而,620°C回火同时将屈服强度提高了~ 50 MPa,并将韧性从~ 56 J显著提高到~ 143 J。定量透射电镜(TEM)表明,这些不同的力学响应源于碳化物形态和尺寸分布的差异。在550回火的样品中,碳化物主要表现为针状形态,平均长度为~ 94.3 nm(最大长度为~ 500 nm),沿三个晶体学方向排列。620℃回火使碳化物形成长度为30 ~ 50 nm的均匀分散的短棒状析出物。这种转变抑制了脆性裂纹的萌生,同时保持了析出强化,从而协同提高了强度和韧性。这一发现为水电应用中超高强度大规格钢的碳化物控制增韧策略提供了新的见解。
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引用次数: 0
Revealing hydrogen dynamics and embrittlement resistance in Cu-modified Al-Sc alloys using machine learning potential 利用机器学习潜力揭示cu改性Al-Sc合金的氢动力学和抗脆化性能
IF 2.7 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2026-04-15 Epub Date: 2026-01-29 DOI: 10.1016/j.matlet.2026.140170
Yucheng Ji , Xiaoqian Fu , Poulumi Dey , Chaofang Dong
Employing a machine learning potential tailored for the AlScCuH system, this study elucidates the dynamic behavior of atomic H in AlScCu alloys. Cu-doped Al3Sc precipitate exhibits a pronounced ability to trap H, thereby diminishing H concentration at critical regions, for instance in front of a crack tip. Such H localization at the crack tip was found to lower both critical stress and threshold strain, which results in significant degradation of the alloy's mechanical properties.
利用为AlScCuH系统量身定制的机器学习潜力,本研究阐明了AlScCu合金中原子H的动态行为。cu掺杂的Al3Sc沉淀物表现出明显的捕获H的能力,从而降低了关键区域(例如裂纹尖端前)的H浓度。发现裂纹尖端的H局部化降低了临界应力和阈值应变,导致合金力学性能显著下降。
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引用次数: 0
Modification of sulfur cathodes with Iron for enhanced metal-sulfur battery performance 铁改性硫阴极提高金属硫电池性能
IF 2.7 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2026-04-15 Epub Date: 2026-01-28 DOI: 10.1016/j.matlet.2026.140176
Khaled Faisal Qasim , Zakaria Mohamed , Osama Ragab , Hassan M. Abdel-Khabeer , D.E. El Refaay , Manal Bin Zaima , M.M. El-Desoky , E. Sheha
This study explores iron-doped sulfur cathodes to enhance the electrochemical performance of sodium- and magnesium‑sulfur batteries. Fe-doped sulfur composites were synthesized hydrothermally and characterized by XRD, FTIR, SEM-EDX, and TGA, confirming successful Fe incorporation, lattice modification, and improved thermal stability. Electrochemical tests on Na/SFe and Mg/SFe cells showed higher initial capacities (about 1280 mAh g−1 for Na and 830 mAh g−1 for Mg). Despite these improvements, both systems exhibited gradual capacity fading due to polysulfide shuttling and interfacial degradation. Warburg analysis revealed reduced diffusion coefficients after cycling, indicating growing mass-transport limitations. Overall, further electrolyte and interface optimization is required for long-term durability.
本研究探索了铁掺杂硫阴极,以提高钠硫电池和镁硫电池的电化学性能。采用水热法合成了铁掺杂硫复合材料,并通过XRD、FTIR、SEM-EDX和TGA对其进行了表征,证实了铁掺杂、晶格修饰和热稳定性的提高。电化学测试表明,Na/SFe和Mg/SFe电池的初始容量更高(Na约为1280 mAh g - 1, Mg约为830 mAh g - 1)。尽管有这些改进,但由于多硫化物穿梭和界面降解,两种体系都表现出逐渐的容量衰退。Warburg分析显示循环后扩散系数降低,表明质量输运限制增加。总体而言,需要进一步优化电解质和界面以实现长期耐用性。
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引用次数: 0
Influence of PSS molecular weight on the structure and electrochemical properties of PEDOT:PSS PSS分子量对PEDOT:PSS结构和电化学性能的影响
IF 2.7 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2026-04-15 Epub Date: 2026-02-03 DOI: 10.1016/j.matlet.2026.140208
Nanjie Wu , Kai Zhang , Hao Liu , Su Deng , Lanlan Wei , Shigui Peng , Qiao Fan , Tingting Luo , Chong Chen , Yucheng Yin , Xiang Zhang , Yufei Liu , Min He , Jie Yu
Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonic acid) (PEDOT:PSS) is a widely used conductive polymer, yet systematic studies on the influence of PSS molecular weight on its electrochemical properties remain scarce. This work systematically investigates the effects of PSS molecular weight on the structure and electrochemical performance of PEDOT:PSS. Results indicate that adjusting PSS molecular weight effectively promotes charge delocalization in PEDOT chains and enhances doping levels. At a PSS molecular weight of 30 kg/mol, PEDOT:PSS exhibits optimal comprehensive performance: its specific capacitance retention reaches 84% when current density increases from 1 A/g to 8 A/g; a capacity retention rate of 97.0% after 5000 cycles; and a maximum material conductivity of 436 S/cm. This study demonstrates that controlling the PSS molecular weight provides an effective strategy for optimizing the performance of PEDOT:PSS electrodes.
聚(3,4-乙烯二氧噻吩):聚(苯乙烯磺酸)(PEDOT:PSS)是一种应用广泛的导电聚合物,但关于PSS分子量对其电化学性能影响的系统研究还很少。本文系统地研究了PSS分子量对PEDOT:PSS结构和电化学性能的影响。结果表明,调整PSS分子量可有效促进PEDOT链中的电荷离域,提高掺杂水平。在PSS分子量为30 kg/mol时,PEDOT:PSS表现出最佳的综合性能:电流密度从1 a /g增加到8 a /g时,其比电容保持率达到84%;5000次循环后容量保持率97.0%;材料电导率最大可达436s /cm。本研究表明,控制PSS分子量是优化PEDOT:PSS电极性能的有效策略。
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引用次数: 0
A new type of PMMA-based fully dielectric tunable strongly coupled system in the mid-infrared region 一种基于pmma的中红外全介质可调谐强耦合系统
IF 2.7 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2026-04-15 Epub Date: 2026-02-03 DOI: 10.1016/j.matlet.2026.140215
Huaiying Jiang , Bin Wang , Shang Wang
A hybrid system based on a fully dielectric metamaterial surface composed of polymethyl methacrylate (PMMA) was investigated. When quasi-bound state coherently coupled with the resonance peak generated by the stretching vibration of the CO bonds in PMMA molecules. This research opened new avenues for materials and science in the fields of polariton chemistry, hypersensitive sensing, nonlinear optical enhancement.
研究了由聚甲基丙烯酸甲酯(PMMA)构成的全介电超材料表面的杂化体系。当准束缚态与PMMA分子中CO键的拉伸振动产生的共振峰相干耦合时。该研究为极化化学、超敏传感、非线性光学增强等领域的材料和科学研究开辟了新的途径。
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引用次数: 0
Remarkably eco-friendly engineering of a promising sustainable metal mesh-based water/oil separator 非常环保的工程,一个有前途的可持续金属网基水/油分离器
IF 2.7 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2026-04-15 Epub Date: 2026-02-02 DOI: 10.1016/j.matlet.2026.140188
Meizi Tian , Ge Liu , Prince Nema Kollie , Xiaogang Guo
Promising metal meshes with controlled porosity and tunable structures offer significant advantages in various water/oil (W/O) separation applications. However, current fabrication methods are not environmentally friendly and often generate serious pollution. Herein, inspired by lotus leaves and rose petals, we first designed a W/O separator based on stainless-steel mesh via an in-situ protocol involving chemical etching, environmentally friendly fatty-acid modification, and microwave curing under mild conditions. FESEM, EDX, FT-IR, and XRD analyses confirmed that the separator possesses a stable, relatively uniform rough surface with low surface energy. The product exhibits a water contact angle >150°, outstanding anti-wetting performance, W/O separation efficiency >98%, and long-term durability. This work sheds new light on the design of an eco-friendly and feasible technique for W/O separation.
具有可控孔隙度和可调结构的金属网在各种水/油(W/O)分离应用中具有显著优势。然而,目前的制造方法并不环保,往往会产生严重的污染。本文以荷叶和玫瑰花瓣为灵感,首先采用化学蚀刻、环保脂肪酸改性、温和条件下微波固化的原位工艺,设计了一种基于不锈钢网的W/O分离器。FESEM, EDX, FT-IR和XRD分析证实,该分离器具有稳定,相对均匀的粗糙表面,表面能低。产品具有150°的水接触角、优异的抗湿性能、98%的水/水分离效率和长期耐用性。这项工作为设计一种环保可行的水/水分离技术提供了新的思路。
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引用次数: 0
Effect of tool pin modification on formation quality of Al/steel FSW joints under zero offset condition 刀销改性对零偏移条件下Al/钢FSW接头成形质量的影响
IF 2.7 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2026-04-15 Epub Date: 2026-02-03 DOI: 10.1016/j.matlet.2026.140212
Yuankun Jing , Song Gao , Lei Shi , Ming Zhai , Qipeng Yin , Wei Zhao , Sachin Kumar
This work shows how adding raised blocks to stir tools improves their performance compared to regular tools in zero-offset friction stir welding of 6061-T6 aluminum and Q235 steel. The raised blocks keep the welding steady, give smoother welds, help the metals join better, and make the weld much stronger: 140, 154, and 120 MPa at 300, 600, and 900 rpm, compared to 59.3, 102, and 98.3 MPa with the regular tool. Putting raised blocks on the tool makes it cut the steel better, helps the metals mix and flow well, and gives better welds, all without wearing the tool out faster. This shows the clear benefits of using this tool change to improve welding quality.
这项工作表明,在6061-T6铝和Q235钢的零偏移搅拌摩擦焊接中,与普通工具相比,在搅拌工具中添加凸起块如何提高其性能。凸起的焊块保持焊接稳定,焊缝更光滑,有助于金属更好地连接,并使焊缝更坚固:在300、600和900转时,焊接强度为140、154和120兆帕,而常规工具的焊接强度为59.3、102和98.3兆帕。在工具上放置凸起的块可以更好地切割钢,帮助金属混合和流动,并提供更好的焊接,所有这些都不会更快地磨损工具。这显示了使用这种工具改变来提高焊接质量的明显好处。
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引用次数: 0
Enhancing microwave absorption performance of graphite via FeCl3 intercalation and post heat treatment 通过FeCl3插层和后处理提高石墨的微波吸收性能
IF 2.7 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2026-04-15 Epub Date: 2026-01-26 DOI: 10.1016/j.matlet.2026.140162
Xu Jia, Hao Tian, Qiqi Jia, Lei Wang, Xiaoyan Yuan, Yi Liu
Graphite exhibits exceptional physicochemical properties, making it a promising candidate for microwave absorption. However, achieving effective impedance matching and a broad absorption bandwidth remains challenging. Herein, a FeCl3 graphite intercalation compound (FeCl3-GIC) was first synthesized via a molten salt method and then converted to FeCl2-GIC through heat treatment. The resulting FeCl2-GIC exhibits remarkable microwave absorption characteristics, with a minimum reflection loss of −42.57 dB and an effective absorption bandwidth of 5.04 GHz, outperforming its FeCl3-GIC precursor. This enhancement is attributed to the unique two-dimensional interlayer structure, the improved magnetic properties imparted by the FeCl2 intercalant, and the synergistic effects among polarization, conduction, and magnetic loss mechanisms. This work provides a viable strategy for designing high-efficiency microwave absorbers based on graphite intercalation compounds.
石墨表现出特殊的物理化学性质,使其成为微波吸收的有希望的候选者。然而,实现有效的阻抗匹配和宽的吸收带宽仍然是一个挑战。本文首先通过熔盐法合成FeCl3石墨插层化合物(FeCl3- gic),然后通过热处理将其转化为FeCl2-GIC。所得FeCl2-GIC具有显著的微波吸收特性,最小反射损耗为- 42.57 dB,有效吸收带宽为5.04 GHz,优于其FeCl3-GIC前体。这种增强归因于独特的二维层间结构,FeCl2插入剂赋予的磁性能的改善,以及极化、传导和磁损失机制之间的协同效应。本研究为设计基于石墨插层化合物的高效微波吸收剂提供了一种可行的策略。
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引用次数: 0
Quantitative study on the initiation grain boundary cracks in Mg-Gd-Y alloys driven by intergranular deformation incompatibility Mg-Gd-Y合金晶间变形不相容引发晶界裂纹的定量研究
IF 2.7 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2026-04-15 Epub Date: 2026-01-25 DOI: 10.1016/j.matlet.2026.140125
Qingqiang Chen, Shunlong Li, Fei Wang, Yanhua Zhao, Yuqin Yan, Jie Sun
Crack initiation in an extruded Mg-Gd-Y alloy under uniaxial tension was quantitatively investigated in this study. The results found that microcracks preferentially nucleate at triple junctions and propagate nearly perpendicular to the tensile axis (<10° deviation). Statistical analysis shows that higher Strain Compatibility Factor (mk) values promote slip transfer across grain boundaries, while larger mk differences between boundaries at triple junctions enhance cracking susceptibility. Such strain incompatibility causes dislocation pile-ups and local strain concentration, driving microcrack formation and eventual macroscopic fracture along grain boundaries. This study establishes a quantitative link between the mk factor and crack initiation, providing a predictive criterion for intergranular fracture in high-strength magnesium alloys.
定量研究了挤压Mg-Gd-Y合金在单轴拉伸作用下的裂纹萌生。结果发现,微裂纹优先在三结处成核,并沿拉伸轴方向垂直扩展(偏离<;10°)。统计分析表明,较高的应变相容性系数(mk)有利于晶界间的滑移传递,而较大的三结晶界间的mk差异则增强了裂纹敏感性。这种应变不相容导致位错堆积和局部应变集中,驱动微裂纹形成,最终沿晶界发生宏观断裂。本研究建立了mk因子与裂纹起裂之间的定量联系,为高强镁合金晶间断裂提供了预测依据。
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引用次数: 0
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