Journal of Alloys and Compounds最新文献

{"title":"A novel heat treatment combining cryogenic and aging treatment for enhanced mechanical properties of extruded Mg-8Gd-3Y-0.4Zr alloy","authors":"Haoran Pang, Liwei Lu, Xingjie Liang, Gongjii Yang, Gang Liu, Lifei Wang, Hua Zhang, Yujuan Wu","doi":"10.1016/j.jallcom.2025.181919","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.181919","url":null,"abstract":"In this study, a novel heat treatment consisting of aging treatment and cryogenic treatment was conducted to process extruded Mg-8Gd-3Y-0.4Zr alloy. The microstructure characteristics were systematically investigated using scanning electron microscopy (SEM), Optical microstructure (OM), electron back-scatter diffraction (EBSD), X-Ray diffraction (XRD) and transmission electron microscope (TEM) to study their correlation with the mechanical properties. The results show that the combination of cryogenic treatment and aging treatment significantly enhances mechanical properties. The sample subjected to 1<ce:hsp sp=\"0.25\"></ce:hsp>h cryogenic treatment followed by aging treatment demonstrated the highest strength (435.5<ce:hsp sp=\"0.25\"></ce:hsp>MPa) among all tested specimens, exhibiting a strength improvement exceeding 100<ce:hsp sp=\"0.25\"></ce:hsp>MPa compared to that treated solely with 1<ce:hsp sp=\"0.25\"></ce:hsp>h cryogenic treatment. However, this was accompanied by a 12.8% reduction in ductility. This phenomenon can be attributed to the aging process, which promotes the nucleation and growth of fine Mg<ce:inf loc=\"post\">3</ce:inf>(Gd,Y) and Mg<ce:inf loc=\"post\">24</ce:inf>(Gd,Y)<ce:inf loc=\"post\">5</ce:inf> precipitates, thereby enhancing second-phase strengthening effects. Conversely, these precipitates may induce stress concentration, leading to decreased plasticity. In addition, the aging treatment following cryogenic treatment can alter grain orientation and reduce dislocation density. Samples subjected solely to cryogenic treatment exhibited more frequent activation of both prismatic &lt;c&gt; slip and pyramidal &lt;c+a&gt; slip systems, which significantly enhanced plasticity. Notably, prolonged cryogenic treatment duration may reduce strength.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"70 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144504005","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":"2.86-kV Vertical Cu2O/Ga2O3 Heterojunction Diodes with Stepped Double-layer Structure","authors":"XiaoHui Wang, MuJun Li, Yang Jiang, KangYao Wen, ChuYing Tang, FangZhou Du, Chun-Zhang Chen, ChenKai Deng, Yi Zhang, HongHao Lu, YiFan Cui, Qing Wang, HongYu Yu","doi":"10.1016/j.jallcom.2025.181672","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.181672","url":null,"abstract":"High-performance Cu<ce:inf loc=\"post\">2</ce:inf>O/β-Ga<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> heterojunction diodes (HJDs) with a notable breakdown voltage of 2860<ce:hsp sp=\"0.25\"></ce:hsp>V were achieved by employing a stepped double-layer (SDL) structure of Cu<ce:inf loc=\"post\">2</ce:inf>O. The device exhibits a turn-on voltage of 1.2<ce:hsp sp=\"0.25\"></ce:hsp>V, a specific on-resistance of 8.1 mΩ·cm<ce:sup loc=\"post\">2</ce:sup>, and a power figure-of-merit exceeding 1.0<ce:hsp sp=\"0.25\"></ce:hsp>GW/cm<ce:sup loc=\"post\">2</ce:sup>. Additionally, the HJD-SDL demonstrates consistent thermal stability, operating normally at temperatures up to 473<ce:hsp sp=\"0.25\"></ce:hsp>K. Simulation results indicate that the SDL structure, consisting of a p<ce:sup loc=\"post\">+</ce:sup> Cu<ce:inf loc=\"post\">2</ce:inf>O/p<ce:sup loc=\"post\">-</ce:sup> Cu<ce:inf loc=\"post\">2</ce:inf>O structure, significantly enhances breakdown performance by effectively suppressing the peak electric field and redistributing it within the device bulk. The temperature-dependent I–V analysis reveals the variations in electrical performance parameters underlying the forward conduction mechanism. The interface trap density at Cu<ce:inf loc=\"post\">2</ce:inf>O/Ga<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> heterojunction is determined through frequency-dependent capacitance and conductance measurements. These findings provide a promising and effective strategy for the development of Ga<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> bipolar power electronics.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"10 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144504003","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":"The coupling effect of heterogeneous structure and dislocations on the precipitation and corrosion behaviors of Al-Mg-Si-Cu-Zn-Fe-Mn alloys","authors":"Xiangyang Chen, Mingxing Guo, Ziteng Peng, Jinming Zhi, Jinqing Du, Tongbo Wang, Wei Zhou, Hu Wang, Huafen Lou","doi":"10.1016/j.jallcom.2025.181914","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.181914","url":null,"abstract":"The heterogeneous structured Al-Mg-Si-Cu-Zn-Fe-Mn alloy sheets with soft/hard microdomains were prepared by a novel short-flow thermomechanical route, and the coupling effects of heterogeneous structure and dislocations on the precipitation and corrosion behavior of alloy sheets was systematically examined in this work. The obtained results demonstrate that the peak aged alloy with optimized heterogeneous structure exhibits superior mechanical properties compared to those prepared using traditional route. Specifically, the yield strength reaches 346<ce:hsp sp=\"0.25\"></ce:hsp>MPa, the ultimate tensile strength attains 380<ce:hsp sp=\"0.25\"></ce:hsp>MPa, and the elongation is 13.1%, representing improvements over traditionally processed alloys. Additionally, the coupling action of heterogeneous structure and dislocations induced by pre-deformation can modify the intergranular precipitation behavior, ultimately enhancing the corresponding corrosion resistance. Furthermore, this study also investigates the intergranular precipitation behavior and corrosion mechanisms in alloys with different heterogeneous microstructures.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"9 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144503823","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":"Microstructure, Mechanical and Cyclic Ablation Properties of C/C-SiC-(Zr,Hf)C-(Zr,Hf)Si2 Composites with Embedded Architecture via Low-Temperature Reactive Melt Infiltration","authors":"Zaidong Liu, Yalei Wang, Tongqi Li, Xiang Xiong, Quanyuan Long, Junwen Liu, Zhiqiang Li, Congcong Liu","doi":"10.1016/j.jallcom.2025.181920","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.181920","url":null,"abstract":"To enhance the mechanical performance and ablation resistance of carbon fiber reinforced ceramic matrix composites, C/C-SiC-(Zr,Hf)C-(Zr,Hf)Si<ce:inf loc=\"post\">2</ce:inf> composites with embedded architectures were prepared using the porous C/C composites filling resin-derived porous carbon (RPC) as green bodies via the low-temperature reactive melt infiltration. The microstructure of the C/C-SiC-(Zr,Hf)C-(Zr,Hf)Si<ce:inf loc=\"post\">2</ce:inf> composites was examined, and a comprehensive analysis was conducted on microstructural evolution, mechanical and cyclic ablation properties. Results revealed that RPC achieved low-temperature rapid densification of C/C-SiC-(Zr,Hf)C-(Zr,Hf)Si<ce:inf loc=\"post\">2</ce:inf> composites while maintaining carbon fiber structural integrity. Simultaneously, RPC-mediated heterogeneous nucleation promoted the formation of an embedded carbide/silicide matrix with enhanced phase stability. The synergistic interplay of the intact fiber reinforcement and embedded matrix endowed the C/C-SiC-(Zr,Hf)C-(Zr,Hf)Si<ce:inf loc=\"post\">2</ce:inf> composites with superior load-bearing capacity, exhibiting flexural strengths of 300.9 ± 12.0<ce:hsp sp=\"0.25\"></ce:hsp>MPa at room temperature and 228.1 ± 7.3<ce:hsp sp=\"0.25\"></ce:hsp>MPa at 1600 °C, accompanied by stable modulus retention. Furthermore, the C/C-SiC-(Zr,Hf)C-(Zr,Hf)Si<ce:inf loc=\"post\">2</ce:inf> composites demonstrated outstanding ablation resistance during three cumulative 600<ce:hsp sp=\"0.25\"></ce:hsp>s cycles under 1900–2000 °C oxyacetylene flames, showing linear and mass ablation rates of -0.063 μm/s and 0.352<ce:hsp sp=\"0.25\"></ce:hsp>mg/s, respectively. This superior ablation resistance originates from the homogeneous biphasic protective structure facilitated by embedded architecture, featuring a thermally stable (Zr,Hf)O<ce:inf loc=\"post\">2</ce:inf> refractory layer synergistically integrated with self-healing Si-Zr-Hf-O glassy phase.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"15 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144504000","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":"Microstructure, strength and corrosion resistance in an Al-Zn-Mg-Cu alloy after artificial aging and subsequent long-term natural aging","authors":"Zhimeng Sun, Shuhui Hao, Huichao Duan, Shize Zhu, Dong Wang, Linlin Li, Kui Du","doi":"10.1016/j.jallcom.2025.181915","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.181915","url":null,"abstract":"Natural aging after artificial aging is inevitable in the long-term service of Al-Zn-Mg-Cu alloy. However, the mechanism of microstructural evolution and its effect on the properties remains largely unexplored. Aberration-corrected high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) and energy dispersive X-ray spectroscopy (EDS) were employed to analyze the precipitation behavior, especially at the grain boundary, and the impact on the properties of the alloy after long-term natural aging. After natural aging, the precipitate free zone (PFZ) widens substantially, and a new Zn-rich grain boundary phase with MgZn<ce:inf loc=\"post\">3</ce:inf> structure is observed. The phase increases the hardness in conjunction with other grain boundary precipitation phases, which promotes grain boundary strengthening and subsequently enhances the mechanical properties of the alloy. In addition, the formation of Zn-rich grain boundary phase creates multiple electrochemical microcouples with other phases, the widened PFZ and the Al matrix, which increase electrochemical activity and consequently affect the corrosion properties. These results reveal the grain boundary precipitation behavior and the influence mechanism on the properties, providing valuable insights for the development of high-strength and corrosion-resistant alloys.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"48 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144504001","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":"Highly Electrically Stable Ag-Au Core-Shell Nanowires-Based Transparent Conductive Films","authors":"Kaixuan Cui, Jiaqi Shan, Yifan Xiao, Yunqi Liu, Huaxing Zhang, Xiaoyu Zhao, Jianbao Ding, Xingzhong Guo","doi":"10.1016/j.jallcom.2025.181923","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.181923","url":null,"abstract":"Silver nanowires (AgNWs) based transparent conductive films (TCFs) have emerged as highly promising alternatives to indium tin oxide (ITO) for flexible optoelectronic devices, but still face the challenge of electrical stability of AgNWs. Herein, highly electrically stable Ag-Au core-shell nanowires-based TCFs (Au@AgNWs TCFs) were fabricated by slot-die coating. Gold is uniformly grown on the surface of AgNWs by in situ reduction to construct Ag-Au core-shell structure with a gold shell thickness of 10<ce:hsp sp=\"0.25\"></ce:hsp>nm. The resultant Au@AgNWs TCF has superior optoelectronic properties with a transmittance of 92% at 550<ce:hsp sp=\"0.25\"></ce:hsp>nm and a sheet resistance of 45 Ω/sq. Compared to the uncoated AgNWs TCF, the Au@AgNWs TCF shows slightly reduced optoelectronic performance, but exhibits significantly enhanced electrical stability. Under continuous operation at 12<ce:hsp sp=\"0.25\"></ce:hsp>V, the resistance of Au@AgNWs TCF only increases by 1.4 times after 18<ce:hsp sp=\"0.25\"></ce:hsp>h, whereas the uncoated AgNWs TCF fails after just 30<ce:hsp sp=\"0.25\"></ce:hsp>min. DFT calculations on the Ag (100)/Au (111) interface confirm the structural stability with a strong adhesion of 1.49<ce:hsp sp=\"0.25\"></ce:hsp>J<ce:hsp sp=\"0.25\"></ce:hsp>m<ce:sup loc=\"post\">-</ce:sup>² and a low interfacial energy of 0.047<ce:hsp sp=\"0.25\"></ce:hsp>J<ce:hsp sp=\"0.25\"></ce:hsp>m<ce:sup loc=\"post\">-</ce:sup>². Differential charge density and DOS reveal significant charge transfer and the formation of an interfacial dipole field to strengthen interfacial bonding and suppress electromigration. CI-NEB calculations show that the Au layer significantly increases the migration barriers for Ag atoms, suppressing migration and enhancing the stability of the interface.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"93 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144503998","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 Cr content on microstructure and properties of Cu-Cr-W alloy based on theoretical and experimental analysis","authors":"Zengye Ning, Xiuqing Li, Qingxia Yang, Jingkun Liang, Tianyao Guo, Jie Wu, Huijie Liu, Dan Jia, Longwei Zhou","doi":"10.1016/j.jallcom.2025.181902","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.181902","url":null,"abstract":"Cu-W alloy has been widely applied of is due to the combination of the high melting point and high strength of W metal and the good electrical conductivity of Cu metal. In this study, the first-principles were used to construct Cu-Cr-W alloy models with different Cr ratios, and their electronic structures and elastic constants were calculated. The results show that the introduction of Cr atoms changes the energy of the electron states of Cu-3d and W-5d orbitals, promoting them to couple and form bonds more easily. Moreover, Cr-3d and W-5d orbitals can form strong bonds, resulting in an increase in the bulk modulus, Young's modulus and shear modulus of the material with the increase in the number of Cr atoms. According to this calculation trend, Cu-W alloys with different Cr contents were prepared by mechanical alloying according to the atomic ratio and sintered into billets by SPS to study their structures and properties. Experiments show that when the Cr addition reaches 4 at%, the material has the best strength and hardness. The tensile yield strength is increased by about 34.7% compared with that of the Cu-W alloy, and the tensile strength is increased by about 30.4%. Considering the combination of material strength and electrical conductivity, when the Cr addition is 1–2 at%, the material has both excellent electrical conductivity and tensile strength. In addition, an appropriate amount of Cr can refine the grains. The diffusion of Cr on the surface of W particles to form Cr<ce:inf loc=\"post\">0.5</ce:inf>W<ce:inf loc=\"post\">0.5</ce:inf> and its own hard characteristics are the main reasons for improving the tensile strength of Cu-Cr-W. By comparing the calculated elastic constants and the experimentally obtained changes in mechanical properties, it is found that the trend of the calculation results can well match the experimental results.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"87 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144504002","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":"Insights into the interfacial effects in heterostructured catalysts toward electrocatalytic oxygen evolution reaction","authors":"Bingbing Du, Juan Li, Sudan Ma, Hu Fan, Jiarui Zhao, Xunan Li, Wei Yuan, Xianxu Chu","doi":"10.1016/j.jallcom.2025.181894","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.181894","url":null,"abstract":"The oxygen evolution reaction (OER) is a crucial process in electrochemical storage and conversion devices, including water electrolysis for hydrogen production, zinc-air batteries, and fuel cells. OER encompasses complex mechanisms involving four-electron transfer steps, multi-step proton coupling, and the formation of O=O covalent bonds, all of which require substantial energy for the electrocatalyst to facilitate the reaction. Transition metal-based heterostructured catalysts exhibit stable and efficient catalytic activity for OER, benefiting from abundant resources, structural diversity, and unique synergistic effects, lattice distortion, and built-in electric field (BIEF) effects. To emphasize the importance of interfacial effects in enhancing electrocatalytic OER, we summarize recent advancements in engineering heterostructured catalysts aimed at promoting this reaction, with a particular focus on the distinctive impacts of interfacial interfaces. Furthermore, we discuss various applications of heterostructured catalysts that improve OER electrocatalysis, along with the underlying structure-activity relationships. Finally, we address the challenges and future perspectives in this fascinating field to provide insights into the design of more efficient OER electrocatalysts.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"35 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144503815","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":"Dual-Metal Synergy in CoFe-MOF Electrocatalysts for Industrial Oxygen Evolution Reaction with High Current Density","authors":"Rongfang Li, Jianjun Wang, Bowen Guo, Jiaxin Zhang, Yuhao Sun, Jiayue Wang, Heng Zhang, Wenqiang Li, Xun Feng","doi":"10.1016/j.jallcom.2025.181892","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.181892","url":null,"abstract":"The development of cost-effective and long-lasting electrocatalysts for the oxygen evolution reaction (OER) continues to pose a pivotal challenge in enabling scalable energy conversion systems. Herein, a novel CoFe-MOF/NF electrocatalyst was prepared through a one-step solvothermal approach by utilizing 2,5-thiophenedicarboxylic acid (TDC) as a sulfur-rich ligand. Structural and spectroscopic analyses confirmed that Fe incorporation alter the electronic structure of Co, while the thiophene-derived ligand facilitates delocalized electron transfer via S→Fe coordination. The optimized CoFe-MOF/NF exhibits outstanding OER performance, attaining ultralow overpotentials of 336<ce:hsp sp=\"0.25\"></ce:hsp>mV at an industrial-grade current density of 1000<ce:hsp sp=\"0.25\"></ce:hsp>mA<ce:hsp sp=\"0.25\"></ce:hsp>cm<ce:sup loc=\"post\">-2</ce:sup> in 1.0<ce:hsp sp=\"0.25\"></ce:hsp>M KOH, surpassing commercial RuO<ce:inf loc=\"post\">2</ce:inf> and pristine Co-MOF/NF. Remarkably, it sustains stable operation for 100<ce:hsp sp=\"0.25\"></ce:hsp>h at 1000<ce:hsp sp=\"0.25\"></ce:hsp>mA<ce:hsp sp=\"0.25\"></ce:hsp>cm<ce:sup loc=\"post\">-2</ce:sup>, with post-test characterization revealing surface reconstruction into active (oxy)hydroxide species. Density functional theory (DFT) analyses indicate that incorporating Fe moves the d-band center of Co sites closer to the Fermi level. This adjustment enhances *OH desorption and decreases the energy barrier associated with the rate-determining step. This work highlights a synergistic strategy combining bimetallic electronic regulation and ligand engineering to design high-performance MOF electrocatalysts for industrial OER applications.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"18 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144503924","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, characterization and cytocompatibility of Fe3O4@yttrium silicate: Samarium nanoparticles with tunable magneto-luminescent properties","authors":"Fatma Unal, Ezgi Yucel, Zeynep Cemre Orsel, Mehmet Fatih Akyel, Batur Ercan","doi":"10.1016/j.jallcom.2025.181885","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.181885","url":null,"abstract":"Magneto-luminescent nanomaterials integrate magnetic control and optical traceability, offering unique advantages for biomedical and photonic applications. In this study, Fe<ce:inf loc=\"post\">3</ce:inf>O<ce:inf loc=\"post\">4</ce:inf>@Yttrium Silicate:Samarium core@shell nanoparticles (NPs) were synthesized via a modified Stöber method and systematically characterized to evaluate their structural, magnetic, optical, and biological performance. X-ray diffraction and electron microscopy confirmed the formation of a crystalline Fe<ce:inf loc=\"post\">3</ce:inf>O<ce:inf loc=\"post\">4</ce:inf> core surrounded by an amorphous a rare-earth- doped silicate shell. With increasing Sm content, a clear enhancement in photoluminescence intensity and a reduction in optical band gap (down to 4.48 eV for 2.5 % Sm) were observed, indicating optically tunable characteristics of the nanoparticles. Meanwhile, superparamagnetic behavior was retained, although saturation magnetization decreased slightly with higher dopant levels due to 4f-3d orbital interactions. Importantly, <ce:italic>in vitro</ce:italic> cytocompatibility assessments using L929 fibroblasts revealed no significant difference in cellular viability upon the culture with nanoparticle extracts over 5 days compared to the untreated controls, even at the highest Sm concentration, and SEM imaging demonstrated preserved cellular morphology across all sample groups. These results indicate that the Fe<ce:inf loc=\"post\">3</ce:inf>O<ce:inf loc=\"post\">4</ce:inf>@YS:2.5Sm formulation provides an optimal balance between magnetic functionality, optical performance, and biological safety. This unique combination of properties makes the synthesized nanoparticles potential candidates for advanced theranostic applications, targeted drug delivery, and photonic technologies such as photothermal therapy and optoelectronics. Their ability to simultaneously offer magnetic guidance, optical traceability, and excellent cytocompatibility underscores their potential for use in multifunctional biomedical platforms where performance, precision, and safety are equally critical.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"14 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144503824","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}