Journal of Materials Science & Technology最新文献

{"title":"Engineered multifunctional nanoplatform with DNase-mimetic activity and self-supplying H2O2 capability for enhanced chemodynamic biofilm eradication","authors":"Dongxu Jia, Anzhuo Weng, Wei Yang, Xinyan Zheng, Yujuan Jia, Hu Xu, Yanxia Zhang, Qian Yu","doi":"10.1016/j.jmst.2025.10.008","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.10.008","url":null,"abstract":"Biofilm infections represent a critical global health threat, characterized by high mortality and significant resistance to conventional therapies. Chemodynamic therapy (CDT), which harnesses Fenton or Fenton-like reactions to generate bactericidal hydroxyl radicals (•OH), has emerged as a promising approach for combating planktonic bacterial infections. Nevertheless, its effectiveness against biofilms remains limited because of the protective extracellular polymeric substance (EPS) matrix and low endogenous H₂O₂ concentrations. To overcome these challenges, a cascade-activatable nanoplatform was developed, integrating deoxyribonuclease-mimetic components with self-sustaining H₂O₂ generation. The platform consists of Ce⁴⁺/nitrilotriacetic acid (NTA) complexes immobilized on amino-functionalized SiO₂ shells encapsulating CuO₂ nanodots. In the acidic microenvironment of biofilms, this nanoplatform initiates a two-pronged approach: First, the Ce⁴⁺/NTA complexes selectively degrade extracellular DNA within the EPS matrix, disrupting biofilm structure and facilitating deeper penetration; Second, CuO₂ decomposition releases substantial H₂O₂ and Cu²⁺ ions, the latter catalyzing a Fenton-like reaction that converts H₂O₂ into cytotoxic •OH radicals, inducing bacterial membrane lipid peroxidation. This combined strategy demonstrated outstanding antibiofilm performance <em>in vitro</em>, eliminating over 99.9% of both <em>Staphylococcus aureus</em> (<em>S. aureus</em>) and <em>Pseudomonas aeruginosa</em> (<em>P. aeruginosa</em>)biofilms. <em>In vivo</em> testing using an <em>S. aureus</em>-infected murine wound model demonstrated a substantial decrease in bacterial colonization alongside enhanced tissue repair kinetics, with no detectable toxicological effects. By simultaneously overcoming matrix penetration barriers and autonomously generating H₂O₂, this approach offers a robust enhancement of CDT efficacy against persistent biofilm infections.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"58 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145295457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Triple-synergistic heterostructure nanocomposite achieving superior UV stability, stimuli-responsive protection, and corrosion resistance in marine coating","authors":"Hao Li, Hao-Jie Yan, Hui-Song Hu, You-Lin Zhang, Qin-Hao Zhang, Xian-Ze Meng, Lian-Kui Wu, Fa-He Cao","doi":"10.1016/j.jmst.2025.09.053","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.09.053","url":null,"abstract":"Ultraviolet (UV) irradiation and coupled environmental degradation cause premature failure of marine coatings, thereby exacerbating metal corrosion processes. Developing coatings that integrate both weather resistance and durability remains a significant yet challenging endeavor. Herein, we report a multifunctional intelligent coating (GO-HHU-T-EP) through the triple synergistic incorporation of graphene oxide (GO), cerium-based metal-organic framework (HHU), and Tinuvin 1130 (T). The GO-HHU-T heterostructure is synthesized via a facile and sustainable strategy. Density functional theory (DFT) and molecular dynamics (MD) simulations reveal that the GO-HHU-T composite with excellent dispersibility significantly enhances the coating’s compactness. Given its UV absorption and radical scavenging mechanisms, GO-HHU-T-EP coating maintains structural integrity with 95.9% and 80.9% retention of tensile strength and interfacial adhesion after UV aging. Furthermore, GO-HHU-T-EP coating confirms outstanding corrosion resistance (<em>Z_f</em>_=0.01Hz 6.4 × 10⁹ Ω cm²) after 100-day immersion in aggressive solutions, demonstrating a 37647.1 times improvement over EP coating. The intelligent heterostructure enables active protective properties for the GO-HHU-T-EP coating via environmental stimulus responsiveness. Projected density of states (PDOS) indicates that the adsorption mechanism originates from strong hybridization interactions between Fe and Ce/O atom orbitals. This work presents a promising design strategy for next-generation marine coatings that integrate anti-UV aging, mechanical enhancement, active protection, and long-term durability.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"37 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145283535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Origin and regulation of ultrahigh electrical conductivity of graphene in copper matrix composites","authors":"Shiyu He, Yuye Zhao, Jiawen Dai, Xuanyi Wang, Wenqing Dai, Yongfeng Geng, Ruijuan Qi, Di Zhang, Ding-Bang Xiong","doi":"10.1016/j.jmst.2025.10.006","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.10.006","url":null,"abstract":"The observed highest electrical conductivity of graphene in copper matrix composites can exceed that of free-standing graphene or copper matrix by more than three orders of magnitude, because of the work function difference and corresponding electron doping effect between graphene and copper. In this work, the enhancement mechanisms of electrical conductivity of graphene are further clarified by regulating interfacial microstructures and atomic bonding states through a hot-pressed (HP) annealing process, along with analyzing corresponding variations in electrical conductivity. The effects introduced by the HP-annealing process can be directly observed through experimental characterizations, which mainly manifest as the orientation transformation of the copper matrix and an increase in the content of Cu–C bonds. This provides an effective method for regulating the key factors beneficial for electrical conductivity, and the coupling relationships among various effects have also been confirmed through calculation. The uniform orientation relationship of the matrix on both sides of graphene and the axial compressive strain introduced by HP-annealing can reduce the Cu–C layer distance, which can promote charge transfer and bonding trend, clarifying the mechanism for enhancing the electrical conductivity of graphene. This regulation is universal and applicable to various graphene with different layer numbers, and it is of significance for further enhancing the electrical conductivity of graphene-reinforced metal matrix composites.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"3 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145289193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Oxidation-creep damage assessment of Ni-based single-crystal superalloy and coated system","authors":"Haiqing Pei, Shuaishuai Wang, Hao Zhang, Haoyu Yu, Xiaoyi Shi, Yanqiu Yang, Zhixun Wen, Zhufeng Yue","doi":"10.1016/j.jmst.2025.09.059","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.09.059","url":null,"abstract":"The oxidation-creep behavior and failure mechanisms of Ni-based single-crystal superalloys, both with and without a thermal barrier coating (TBC), were investigated through a combined experimental and theoretical approach. The results indicate that TBC-coated specimens generally exhibit longer creep life. Multi-scale characterization techniques were employed to analyze the failure mechanisms. Both coated and uncoated specimens exhibited varying degrees of oxidation and shear slip. Severe oxidation was observed in uncoated specimens. The oxidation mechanism under creep loading was analyzed in detail, and then the oxidation kinetics and damage models incorporating temperature and stress effects were established. In contrast, coated specimens developed a continuous and dense thermally grown oxide (TGO) layer at the top coat (TC)/bond coat (BC) interface, effectively mitigating substrate oxidation. Based on continuum damage mechanics (CDM) and crystal plasticity (CP) theory, a creep constitutive and damage model was developed for the uncoated alloy, incorporating oxidation, defect evolution and material degradation. For the coated material, an enhanced model was established, accounting for the coordinated deformation between the coating and substrate, as well as the coating’s oxidation resistance. The Crystal plasticity finite element method (CPFEM) simulations successfully predicted the creep behavior, with computed creep life and deformation trends showing good agreement with experimental results.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"1 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145283533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Wafer-scale high-performance flexible solar-blind ultraviolet photodetectors based on a-Ga2O3 grown by MOCVD","authors":"Yu Hu, Tiwei Chen, Chen Cui, Zhucheng Li, Huanyu Zhang, Anjing Luo, Guangyuan Yu, Zijing Wang, Gaofu Guo, Dengrui Zhao, Li Zhang, Chunhong Zeng, Qi Cui, Wenhua Shi, Yiqun Wang, Xiaodong Zhang, Zhongming Zeng, Baoshun Zhang","doi":"10.1016/j.jmst.2025.10.005","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.10.005","url":null,"abstract":"Flexible ultraviolet photodetectors are widely investigated for applications in wearable electronics and environmental monitoring due to their lightweight characteristics and compatibility with complex surfaces. Amorphous gallium oxide (a-Ga₂O₃), with its wide bandgap of 4.9 eV, is highly suitable for flexible solar-blind UV detection. However, deep-level defects such as oxygen vacancies have long degraded the performance of a-Ga₂O₃-based flexible detectors. In addition, achieving large-area flexible devices remains challenging, which continues to constrain their development. Herein, an oxygen-rich design strategy is employed to shorten the device response time to 4.3/11.2 ms, suppress the dark current from 6.9 to 0.3 μA, and enhance the detector bandwidth up to 600 dB. The 4-inch wafer-scale flexible a-Ga₂O₃ detectors are realized by leveraging mechanical thinning and wet etching processes. Remarkably, the devices exhibited highly consistent performance before and after transfer, as well as under repeated bending at various angles and temperature variations. Furthermore, a large-area flexible detector array comprising 144 pixels is fabricated, and high-contrast ultraviolet imaging is successfully demonstrated. This study provides a significant reference for the development of high-performance, wafer-scale a-Ga₂O₃-based flexible detectors.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"1 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145289225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Coupling AFCCX topology with volume fraction control to engineer electron beam melted high-performance lattice structures for potential orthopedic application","authors":"Wu Pan, Yu Guo, Liang-Yu Chen, Zi-Han Ge, Ze-Xin Wang, Cheng-Liang Yang, Chang-Shu Xiang, Lai-Chang Zhang, Feng-Rui Li","doi":"10.1016/j.jmst.2025.09.057","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.09.057","url":null,"abstract":"Lattice structures are renowned for their high stiffness-to-weight ratios and remarkable energy adsorption capabilities. Although both the all-face-centered cubic with x-struts (AFCCX) structure and its original counterpart (AFCC) manifest satisfactory mechanical performance, the coupling influence of volume fraction and topology on their mechanical properties remains elusive. This work employed electron beam melting to fabricate Ti-6Al-4V AFCC and AFCCX structures with volume fractions of 10%, 20%, and 30% and systematically investigated their deformation behavior. Compared to the AFCC structures, the AFCCX structures demonstrate improved mechanical properties, with the elastic modulus increasing by 1.4%–10.3%, the compressive strength increasing by 8%–12%, and the energy absorption increasing by 8.0%–14.5% (25% strain). The x-struts effectively disperse the local strains in AFCCX and suppress the expansion of the cell during deformation. Therefore, more struts in the AFCCX structure are engaged in bearing the load, leading to an augmented structural efficiency. Notably, the x-struts cannot directly sustain the external loads. They do contribute to a modest enhancement in the stiffness and strength of the structures, thereby facilitating more effective engineering. This work offers valuable concepts for the straightforward design and optimization of lattice structures.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"7 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145283539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Passive film response of Ti-6Al-4V alloy welded joints to hydrostatic pressure in simulated deep-sea environments","authors":"Yu Cui, Guo Jin, Shuangyu Du, Jun Liu, Rui Liu, Fuhui Wang, Li Liu","doi":"10.1016/j.jmst.2025.09.056","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.09.056","url":null,"abstract":"The passive films formed on distinct regions (heat-affected zone (HAZ), base metal (BM), and weld metal (WM)) of Ti-6Al-4V alloy welded joints were comparatively investigated under hydrostatic pressures of 0.1 and 15 MPa in a simulated deep-sea environment. Results demonstrate that elevated hydrostatic pressure significantly degrades the corrosion resistance of passive films, with region-dependent susceptibility following the order: HAZ &gt; BM &gt; WM. This phenomenon is attributed to the synergistic interaction between hydrostatic pressure and residual stress. Among them, the residual tensile stress in HAZ enhances the effect of hydrostatic pressure, which greatly increases the density of defects in the passive film. Conversely, the compressive residual stress in WM exerts a protective effect, mitigating the detrimental influence of hydrostatic pressure on passive film integrity. The reduction of V content in β phase in the WM region improves the stability of the passive film.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"18 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145283107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistic effects of permeated hydrogen, grain boundary type, and carbide on the intergranular oxidation of Alloy 600TT in high temperature water","authors":"Jing Nong, Zhiyuan Liu, Shichen Wei, Zanxi Ruan, Zhengqing Bai, Jian Xu, Tetsuo Shoji","doi":"10.1016/j.jmst.2025.09.055","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.09.055","url":null,"abstract":"Thermally-treated Alloy 600 (Alloy 600TT) is used for steam generator tubes in pressurized water reactors. The significant difference in the dissolved hydrogen content between the two sides of the tubes promotes H permeation through the tube wall. The impacts of permeated H on the intergranular oxidation behavior of nickel-based Alloy 600TT in high-temperature water environments were investigated through a dual-exposure test with in-situ H charging and comprehensive microstructural characterization. A total of 24 cross-sections of grain boundaries (GBs) were observed, and the results reveal that permeated H significantly accelerates oxidation, particularly at random high-angle GBs, whereas coherent twin boundaries demonstrate greater resistance. The semi-continuous distribution of intergranular carbides creates heterogeneous oxidation initiation susceptibility along the grain GB surfaces with distinct oxidation susceptibilities. Without permeated H, carbides form a protective chromium-rich oxide layer. However, H disrupts this protection by inducing oxide amorphization and interfacial voids, ultimately leading to the oxidation acceleration and oxide degradation. These findings reveal the complex interactions between permeated H, GBs, and carbides in intergranular degradation and have significant implications for understanding the GB degradation mechanisms of steam generator tubes in pressurized water reactor environments.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"125 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145283109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Layer-thickness-dependent unusual strain hardening of Ti/Ti6Al4V laminated composites: An in situ cryogenic EBSD study","authors":"Yang Zhang, Zhibin Chen, Zhuangzhuang Liu, Hao Wu, Guohua Fan","doi":"10.1016/j.jmst.2025.10.002","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.10.002","url":null,"abstract":"Heterogeneous laminated composites present a promising approach to overcome the strength-ductility trade-off in structural materials. However, their deformation mechanisms under cryogenic conditions are not yet fully understood, which hinders their application in low-temperature environments. Here, we design Ti/Ti6Al4V laminated composites with tailored layer thicknesses and report an unusual strain-hardening behavior at 77 K, mediated by interfacial-constraint-induced {10−12} twins. Through <em>in situ</em> cryogenic electron backscatter diffraction, we for the first time correlate the twin dynamics at cryogenic temperatures with the layer thickness (serving as the key structural parameter for laminated composites) and the width of the interface-affected zone (serving as the key physical parameter for interfacial mechanics). This correlation leads to the key finding that a strong interfacial constraint is generated when the softer titanium layer is fully covered by two neighboring interface-affected zones, potentially triggering unique behaviors such as the unusual strain hardening observed in this study. Thus, our work provides a generalizable strategy for designing high-performance cryogenic laminates and advances the potential applications in aerospace and energy systems operating in extreme environments.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"37 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145283537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Revealing the tensile behaviour of half-Heusler thermoelectric materials across varying temperatures","authors":"Yanyan Lu, Yani Jing, Pengxin Zhang, Qingfeng Song, Shengqiang Bai, Lidong Chen, Wenzhi Wang","doi":"10.1016/j.jmst.2025.10.004","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.10.004","url":null,"abstract":"Half-Heusler (HH) materials exhibit high thermoelectric performance, offering strong potential for efficient and reliable conversion of thermal-to-electrical energy. Comprehensive characterisation of the mechanical properties at operating temperatures is crucial for the practical application of such materials. Herein, the temperature-dependent tensile responses and failure mechanisms of p-type Zr_0.5Hf_0.5CoSb_0.8Sn_0.2 and n-type Zr_0.5Hf_0.5NiSn_0.985Sb_0.015 HHs were systematically investigated. High-temperature mechanical tests revealed that the tensile strength and elastic modulus of both HHs decreased with increasing temperature. The p-type HH retained its elastic load-bearing capacity throughout the tested temperature range (300–1100 K), whereas the tensile behaviour of the n-type HH transitioned from linear (at 300, 500, and 700 K) to nonlinear (at 900 and 1100 K). Micro-fractographic characterisation confirmed that oxidation and segregation intensified in both HHs at elevated temperatures, with the n-type HH exhibiting a greater reduction in grain boundary strength than the p-type HH. Temperature-dependent stress–strain relationships were established for both HHs to accurately describe their tensile responses. These findings provide valuable insights for designing reliable thermoelectric devices for engineering applications.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"81 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145283110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}