Journal of Alloys and Compounds最新文献

{"title":"One-Pot Synthesis of Heterointerface-Engineered TiO2/C Nanospheres with NiSe2/FeSe2 Modifications for Kinetics-Enhanced Sodium-Ion Batteries","authors":"Jinkai Wang, Yiming Yong, Gengrui Liu, Yingge Xu, Yaoyao Wang, Min Wang, Boshi Liu, Zhengdong Wang, Hongkang Wang, Zongyou Yin","doi":"10.1016/j.jallcom.2025.184212","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184212","url":null,"abstract":"Despite the fact that titanium dioxide (TiO₂) is a promising anode material for sodium-ion batteries towing to its optimal working potential and exceptional structural stability, its widespread adoption is challenged by its intrinsically low electronic/ionic conductivity and modest theoretical capacity. To address these limitations, we develop a one-pot solvothermal-selenisation strategy to fabricate heterointerface-engineered TiO₂/C nanospheres with NiSe₂/FeSe₂ modifications (NFSe@TO/C). The novelty of this work lies in the multi-synergistic design: the carbon matrix not only effectively mitigates volume variations but also significantly enhances charge transfer kinetics; meanwhile, the in-situ constructed NiSe₂/FeSe₂ heterointerfaces and introduced oxygen vacancies enable a dual Na⁺ storage mechanism dominated by surface-capacitive behaviour. Consequently, the optimized NFSe@TO/C-0.1 anode delivers a high reversible capacity of 391.7 mAh g⁻¹ at 0.1<!-- --> <!-- -->A<!-- --> <!-- -->g⁻¹, which is higher than that of the pristine Se@TO/C control sample. It also exhibits exceptional long-term cycling stability with 78.9% capacity retention after 80 cycles at 0.1<!-- --> <!-- -->A<!-- --> <!-- -->g⁻¹ (and 234.4 mAh g⁻¹ after 500 cycles at 0.5<!-- --> <!-- -->A<!-- --> <!-- -->g⁻¹). This study proposes a universal design strategy integrating defect engineering, heterointerface modulation, and nanoconfinement synergy, offering new perspectives for developing advanced energy storage materials.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145235071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Achieving Triple Functionalities in Polyurethane Coatings: The Role of Ti3C2Tx-Mn2O3@Co3O4 Composite Fillers","authors":"Xu Yuan, Wei Wang, Lin Cao, Yang Han","doi":"10.1016/j.jallcom.2025.184232","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184232","url":null,"abstract":"This study reports on a multifunctional composite coating integrating noise reduction, corrosion resistance, and self-healing properties. A Ti₃C₂T_x-Mn₂O₃@Co₃O₄ ternary heterojunction filler was successfully prepared via ultrasound-assisted hydrothermal method. Owing to its semiconductor characteristics and ternary heterostructure, the composite filler exhibits an exceptional photothermal conversion performance, reaching 117.3 °C under 1<!-- --> <!-- -->W·cm⁻² NIR irradiation. The composite filler was incorporated into a polyurethane matrix to fabricate the functional coating. The composite coating demonstrates outstanding sound absorption performance, with coefficients exceeding 0.6 at frequencies of 6000<!-- --> <!-- -->Hz and above. Remarkably, it simultaneously achieves approximately 38<!-- --> <!-- -->dB attenuation of ambient noise under standard testing conditions. Finite element method (FEM) simulations confirm that even the coating with a 2.93% damage ratio achieves a 16.7% reduction in ambient noise under simulated marine conditions. The Ti₃C₂T_x-Mn₂O₃@Co₃O₄ composite filler imparts superior corrosion resistance to the composite coating through its synergistic labyrinth effect and defect filling capabilities. The composite coating maintains an impedance modulus of 3.32 × 10⁹ Ω·cm² after 50 days immersion in 3.5<!-- --> <!-- -->wt.% NaCl solution. The composite coating also exhibits a rapid self-healing ability within 100<!-- --> <!-- -->s under 1<!-- --> <!-- -->W·cm⁻² NIR irradiation through photothermally activated dynamic covalent bond reconfiguration. After multiple damaging-healing cycles, it retains up to 37<!-- --> <!-- -->dB noise dissipation capacity and |Z|_0.01Hz up to 1.12×10⁹ Ω·cm². With its outstanding noise reduction, corrosion protection, and autonomous damage healing capabilities, this coating shows a tremendous application potential in marine equipment for noise control and corrosion prevention.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"4 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145229326","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation of multi-colored coatings on magnesium alloy surfaces using hydrothermal methods","authors":"Qingrong Tan, Jiyuan Zhu","doi":"10.1016/j.jallcom.2025.184238","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184238","url":null,"abstract":"With advances in technology, the importance of magnesium alloy is becoming increasingly significant, and thus its poor corrosion resistance and single color defects are becoming more and more prominent. At present, the preparation of coatings with adjustable colors on the surface of magnesium alloy has been less studied. To address this problem, a corrosion-resistant coating with a variety of distinctive colors was successfully prepared on the surface of magnesium alloy via hydrothermal method. In this paper, by varying the concentration of reagents, the regulation mechanism of the coating color was investigated, and it was found that with the increase of the concentration of hydroxide ions, the color gradually became darker, and the wavelength of the reflected light became shorter accordingly. These findings indicate a key role for hydroxide ions in the coating color transformation process. In addition, the prepared coatings were tested for adhesion and corrosion resistance. The adhesion test grade was 5B, which indicates that the prepared coating shows good adhesion and uniform color. Electrochemical and immersion experiments proved that the coating has strong corrosion resistance, the coating not only provides the magnesium substrate with bright colors but also offers stronger protection to the substrate. This enhancement significantly improves the appearance and service life of magnesium alloys, making them well-suited for large-scale applications and providing robust support for their broader utilization.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"32 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145235136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrigendum to “Effects of Rare Earth Y on Solidification Microstructure and Oxidation Resistance of Ti-42Al-5Mn Alloy” [J. Alloys Compd. 1042, (15 October 2025) 183958]","authors":"Pengjia Wang, Junjie Hao, Huaichao Zuo, Qiming He, Baoying Peng, Xiaobing Li, Kui Liu","doi":"10.1016/j.jallcom.2025.184109","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184109","url":null,"abstract":"The authors regret –","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"18 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145235001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of the structural, morphological, magnetic, optical, and dielectric properties of a novel Fe3O4@1.4-DHB nanocomposites","authors":"Muhyettin ECE, Adil UMAZ, Mehmet Şakir ECE","doi":"10.1016/j.jallcom.2025.184228","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184228","url":null,"abstract":"This study focuses on the detailed analysis of the synthesis, structural, morphological, surface textural, magnetic, optical, and electrical properties of Fe₃O₄@1,4-DHB magnetic nanocomposites (MNCs). Fe₃O₄@1,4-DHB MNCs were produced by a one-step chemical reaction process with a core-shell strategy. The average crystallite size, dislocation density, micro-strain, saturation magnetization, surface area and band gap energy values of Fe₃O₄@1,4-DHB MNCs were measured as 8.14 nm, 15.86×10^-3nm^-2, 3.74×10^-3, 41.96 emu/g, 101.96 m²/g and 4.38 eV, respectively. Fe₃O₄@1,4-DHB MNCs were determined to have an inverse spinel structure, exhibit superparamagnetic, and mesoporous characteristics. The narrow band gap of Fe₃O₄@1,4-DHB MNCs reveals that it has a wide light usage range and exhibits optical properties. The behaviors of the parameters Bode curve, dielectric constant, dielectric loss factor, loss tangent value, capacitance, admittance (susceptance, conductance), and real electric modulus, loss electric modulus of Fe₃O₄@1,4-DHB MNCs were investigated. The series resistance of Fe₃O₄@1,4-DHB MNCs was measured as 402 Ω, capacitance as 2.352×10^-11F, and charge transfer resistance as 227.3 kΩ. It was observed that increasing the frequency decreased the dielectric constant, dielectric loss factor, tanδ (after a certain value), and capacitance values. However, increasing the applied voltage (at low frequency) increased the phase angle, dielectric loss factor, tanδ values, capacitance values, and conductance values in a smooth regime. Because this nanocomposite exhibits magnetic, optical and dielectric properties, it can play an important role as a material that can be used in various applications in many branches of industry in the future.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"18 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145235068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Observation of superior magnetocaloric properties near ambient temperature in (La-Ce-Pr-Nd)10Fe90-xBx ribbons","authors":"Y. Su, G.F. Wang, J.W. Li, Y.Y. Ma","doi":"10.1016/j.jallcom.2025.184225","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184225","url":null,"abstract":"In this study, ribbons with a nominal composition of MM&lt;sub&gt;10&lt;/sub&gt;Fe&lt;sub&gt;90-&lt;em&gt;x&lt;/em&gt;&lt;/sub&gt;B&lt;sub&gt;&lt;em&gt;x&lt;/em&gt;&lt;/sub&gt; (where MM denotes mischmetal La-Ce-Pr-Nd derived from Bayan obo ore of China without a separation process) were fabricated using the melt-spinning method. The structural and magnetocaloric properties were systematically investigated by means of X-ray diffraction, scanning electron microscopy, transmission electron microscopy, differential scanning calorimetry and vibrating sample magnetometry. The results indicate that crystalline phase formation in the ribbons is significantly suppressed with increasing B content. The Curie temperature increases from 269&lt;!-- --&gt; &lt;!-- --&gt;K for &lt;em&gt;x&lt;/em&gt; = 2 to 345&lt;!-- --&gt; &lt;!-- --&gt;K for &lt;em&gt;x&lt;/em&gt; = 6, covering the room-temperature range. The ribbons show a superior magnetocaloric effect and relative cooling power (RCP) near room temperature except for &lt;em&gt;x&lt;/em&gt; = 2. With a magnetic field change of 3&lt;!-- --&gt; &lt;!-- --&gt;T, the ribbon with &lt;em&gt;x&lt;/em&gt; = 5 exhibits a maximum isothermal entropy change of &lt;span&gt;&lt;span style=\"\"&gt;&lt;/span&gt;&lt;span data-mathml='&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;mo linebreak=\"badbreak\" linebreakstyle=\"after\" is=\"true\"&gt;&amp;#x2212;&lt;/mo&gt;&lt;mi mathvariant=\"normal\" is=\"true\"&gt;&amp;#x394;&lt;/mi&gt;&lt;msub is=\"true\"&gt;&lt;mrow is=\"true\"&gt;&lt;mi is=\"true\"&gt;S&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow is=\"true\"&gt;&lt;mi is=\"true\"&gt;T&lt;/mi&gt;&lt;mo is=\"true\"&gt;,&lt;/mo&gt;&lt;mi is=\"true\"&gt;max&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;' role=\"presentation\" style=\"font-size: 90%; display: inline-block; position: relative;\" tabindex=\"0\"&gt;&lt;svg aria-hidden=\"true\" focusable=\"false\" height=\"2.663ex\" role=\"img\" style=\"vertical-align: -0.812ex;\" viewbox=\"0 -796.9 4337.6 1146.6\" width=\"10.074ex\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"&gt;&lt;g fill=\"currentColor\" stroke=\"currentColor\" stroke-width=\"0\" transform=\"matrix(1 0 0 -1 0 0)\"&gt;&lt;g is=\"true\"&gt;&lt;use xlink:href=\"#MJMAIN-2212\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;g is=\"true\" transform=\"translate(778,0)\"&gt;&lt;use xlink:href=\"#MJMAIN-394\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;g is=\"true\" transform=\"translate(1612,0)\"&gt;&lt;g is=\"true\"&gt;&lt;g is=\"true\"&gt;&lt;use xlink:href=\"#MJMATHI-53\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;/g&gt;&lt;g is=\"true\" transform=\"translate(613,-150)\"&gt;&lt;g is=\"true\"&gt;&lt;use transform=\"scale(0.707)\" xlink:href=\"#MJMATHI-54\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;g is=\"true\" transform=\"translate(498,0)\"&gt;&lt;use transform=\"scale(0.707)\" xlink:href=\"#MJMAIN-2C\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;g is=\"true\" transform=\"translate(695,0)\"&gt;&lt;use transform=\"scale(0.707)\" xlink:href=\"#MJMAIN-6D\"&gt;&lt;/use&gt;&lt;use transform=\"scale(0.707)\" x=\"833\" xlink:href=\"#MJMAIN-61\" y=\"0\"&gt;&lt;/use&gt;&lt;use transform=\"scale(0.707)\" x=\"1334\" xlink:href=\"#MJMAIN-78\" y=\"0\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;/g&gt;&lt;/g&gt;&lt;/g&gt;&lt;/svg&gt;&lt;span role=\"presentation\"&gt;&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;mo is=\"true\" linebreak=\"badbreak\" linebreakstyle=\"after\"&gt;−&lt;/mo&gt;&lt;mi is=\"true\" mathvariant=\"normal\"&gt;Δ&lt;/mi&gt;&lt;msub is=\"true\"&gt;&lt;mrow is=\"true\"&gt;&lt;mi is=\"true\"&gt;S&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow is=\"true\"&gt;&lt;mi is=\"true\"&gt;T&lt;/mi&gt;&lt;mo is=\"true\"&gt;,&lt;/m","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"79 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145235069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanistic insights into alloying-induced microstructural evolution and stability of TiAl alloys","authors":"Boyang Gao, Zhongmin Xiao, Xingyu Xiao, Hangyu Yue, Hongbo Guo, Hui Peng","doi":"10.1016/j.jallcom.2025.184233","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184233","url":null,"abstract":"The drive for higher service temperatures, together with advances in additive manufacturing (AM), motivates efforts to improve the high-temperature microstructural stability of TiAl alloys. This study investigates the mechanisms by which Hf and Zr additions affect the formation and stability of lamellar structures at 1100 °C, as well as their impact on the mechanical properties of a Ti-48Al-2Cr-based alloy (at. %), using a 2Nb-containing alloy as a reference. Hf alloying alone refined the lamellar structure and enhanced compressive strength at 700 °C for as-homogenized TiAl alloy. However, it also intensified Cr segregation, which facilitated the formation of coarsened γ phase via the B2 phase during annealing at 1100 °C. Zr alloying produced the finest lamellar colonies and spacing in the as-homogenized alloy, yet it promoted an undesirable network-like <strong>γ</strong> structure prone to cracking under load. Notably, the combined Hf+Zr addition mitigated these adverse effects, yielding an optimal balance of hardness, high-temperature strength, and structural stability. The exceptional thermal stability of the Hf- and Zr-co-alloyed TiAl alloy is attributed to a higher equilibrium α-phase fraction at 1100 °C, a reduced driving force for phase transformation due to lattice distortion, and decreased diffusion coefficients and α₂/γ interfacial energy. Although the materials were produced by casting and controlled heat treatments, the 1100 °C anneal reproduces the thermal environment encountered in AM builds. Accordingly, these mechanistic insights and alloying guidelines identified here are directly informative for tailoring TiAl alloys to withstand AM-related thermal histories.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"123 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145235067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Mg and Li content on the precipitation behavior, mechanical properties and corrosion resistance of cast Al-Li-Mg-Cu alloys","authors":"Wenyuan Wang, Zepeng Zha, Shuai Zhang, Dongshen Huo, Guoying Sui, Chao Chen, Zhenqiang Wang","doi":"10.1016/j.jallcom.2025.184208","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184208","url":null,"abstract":"This study investigates the microstructure evolution, precipitation, mechanical properties, and corrosion resistance of two cast Al-Li-Mg-Cu alloys (1.3Li-4.8Mg and 1.8Li-6.6Mg) during artificial aging at 160 ºC. Simultaneous increases in Mg and Li contents significantly refine the as-cast structure and influence element segregation at grain boundaries. The 1.8Li-6.6Mg alloy demonstrates enhanced precipitation of δ′ (Al₃Li) and β (Al₃Mg₂) phases, leading to superior hardness and strength but reduced ductility due to widened precipitate-free zones and grain boundary precipitation. Conversely, the 1.3Li-4.8Mg alloy features competitive precipitation of T₁ (Al₂CuLi) and S′ (Al₂CuMg) phases, enhancing strength during peak aging but reducing corrosion resistance due to preferential anodic dissolution. The study highlights composition-dependent corrosion mechanisms, driven by potential gradients and phase distribution, offering valuable guidance for optimizing Al-Li-Mg-Cu alloys for aerospace and structural applications.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"115 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145229309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis and characterization of divalent ion-modified ZnF2–AlF3-based glass for mid-infrared fiber applications","authors":"Wenkai Zhao, Ruite Liu, Longfei Zhang, Yiguang Jiang, Long Zhang","doi":"10.1016/j.jallcom.2025.184220","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184220","url":null,"abstract":"In this study, a novel five-component fluoride glass system based on ZnF₂ and AlF₃ was designed, and its glass-forming region was identified. Low field strength elements such as Ca, Pb, and Mg were introduced to enhance glass-forming ability, in accordance with the “confusion principle.” The thermal, optical, mechanical, and chemical properties of the modified glasses were systematically evaluated. Among the modifying ions, Ca²⁺ proved most effective, significantly enhancing thermal stability. The optimized composition, 27ZnF₂–30AlF₃–12SrF₂–13BaF₂–10YF₃–8CaF₂ (mol%), demonstrated excellent comprehensive properties, including high thermal stability (∆T = 108 °C), broad transmission spectra (~7.6<!-- --> <!-- -->µm), low phonon energy (605<!-- --> <!-- -->cm^–1), and excellent chemical stability. A large-size, transparent Ca-modified glass sample was successfully fabricated. This new fluoride glass system presents a viable alternative for the development of optical fibers for high-power laser transmission.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"51 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145235003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Excellent S-band Microwave Absorption of 3D Ni/NPCF@CS Composite Material","authors":"Sain Bux Jamali, Tauqeer Haidar Qamar, Sibt ul Hassan, Nouman Ahmed, Ijaz Ahmad, Pengkun Xia, Shakeel Ahmad, Shengxiang Huang, Lianwen Deng","doi":"10.1016/j.jallcom.2025.184230","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184230","url":null,"abstract":"The escalating demand for effective electromagnetic interference shielding, particularly in the challenging low-frequency microwave range such as S-band, underscores the need for advanced high-performance electromagnetic absorbing materials. Herein, three-dimensional (3D) nickel/nitrogen-doped porous carbon foam decorated with carbon spheres (3D Ni/NPCF@CS) was synthesized for S-band microwave absorption. This unique design capitalizes on the synergistic interplay between the highly conductive and porous 3D carbon skeleton, the magnetic properties of encapsulated Ni nanoparticles, and the enhanced interfacial polarization provided by the conductive polypyrrole coating. This engineered hierarchical architecture created abundant heterogeneous interfaces and microwave loss pathways. Detailed electromagnetic analysis revealed that the optimized Ni/NPCF@CS composite material exhibited exceptional reflection loss (RL) performance of -57.8<!-- --> <!-- -->dB at 3.44<!-- --> <!-- -->GHz. The dominant absorption mechanisms, including dielectric loss from dipole polarization, conductive loss, and magnetic loss from Ni nanoparticles, were thoroughly investigated and discussed. This study provides valuable insights into the development of 3D-foam-based microwave-absorbing materials, particularly for their practical implementation in the S-band.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"49 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145235010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}