Journal of Alloys and Compounds最新文献_第5页

Magnetic Metacomposites with Tunable ε'-Negative Response Achieved by Dual-Functional Phase Paradigm 双功能相模式制备具有可调谐ε负响应的磁性元复合材料

IF 6.2 2区材料科学

Journal of Alloys and Compounds Pub Date : 2025-10-05 DOI: 10.1016/j.jallcom.2025.184218

Ruoting Li, Junti Wang, Shan Chen, Yunpeng Qu, Zhenxin He

{"title":"Magnetic Metacomposites with Tunable ε'-Negative Response Achieved by Dual-Functional Phase Paradigm","authors":"Ruoting Li, Junti Wang, Shan Chen, Yunpeng Qu, Zhenxin He","doi":"10.1016/j.jallcom.2025.184218","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184218","url":null,"abstract":"Metacomposites have achieved a controllable ε'-negative (ε' < 0) response in the radio frequency band, and thus have shown attractive application prospects in fields such as antenna design, radar stealth, new filters, and sensors. Therefore, in this work, the dual-functional phase metacomposites was developed based on the composite design strategy of conductors/insulators. In it, carbon nanotube-carbon black (CNT-CB) prepared by electrostatic self-assembly process was used as the conductor phase, and magnetic ferric oxide (Fe3O4) prepared by in-situ reduction was used as the insulating phase. An ε'-negative response in the 20 MHz-1 GHz region was successfully achieved, and the ε' value has been precisely regulated at the order of 103. This is because the successful construction of the three-dimensional (3D) CNT-CB network enables the metacomposites to achieve the plasmonic oscillation effect, which is regulated by the effective carrier concentration and the damping effect of the Fe3O4 insulator. We analyzed the structure-function relationship of the metacomposites through the electrical percolation model and equivalent circuit analysis. Finally, we investigated the response characteristics of extremely weak ε'-negative (-10 < ε' < 0) metacomposites at 1 GHz frequency to electromagnetic waves through 3D radar scattering simulation and thermal infrared imaging. Our work will provide a new design paradigm of magnetic metacomposites based on dual-functional phases and offer a new perspective for in-depth clarification of the precise regulation mechanism of ε'-negative response.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"32 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145229329","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}

引用次数: 0

High-throughput investigation of diffusion properties in FCC Cu-Ni-Al-(Si, Fe) alloys and application to solidification and homogenization simulations FCC Cu-Ni-Al-(Si, Fe)合金扩散特性的高通量研究及其在凝固和均匀化模拟中的应用

IF 6.2 2区材料科学

Journal of Alloys and Compounds Pub Date : 2025-10-05 DOI: 10.1016/j.jallcom.2025.184203

Yankun Li, Xinrong Zhao, Zhi Zhang, Ying Tang, Lijun Zhang, Xiang Zhang, Chunnian He, Naiqin Zhao

{"title":"High-throughput investigation of diffusion properties in FCC Cu-Ni-Al-(Si, Fe) alloys and application to solidification and homogenization simulations","authors":"Yankun Li, Xinrong Zhao, Zhi Zhang, Ying Tang, Lijun Zhang, Xiang Zhang, Chunnian He, Naiqin Zhao","doi":"10.1016/j.jallcom.2025.184203","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184203","url":null,"abstract":"Four groups of Cu-Ni-Al-Si and six groups of Cu-Ni-Al-Fe diffusion couples were prepared, and the concentration distributions within the diffusion layers formed between 1173 K and 1273 K were measured. Using the obtained concentration profiles, the interdiffusion coefficients and mobility descriptions for the face-centered cubic (FCC) Cu-Ni-Al-(Si, Fe) systems were determined through the numerical inverse method in a high-throughput manner. The impact of compositions on the interdiffusion coefficients and relative diffusion rates within the specified composition and temperature ranges was analyzed. Subsequently, the established mobility description was utilized to simulate the solidification and homogenization heat treatment processes in Cu-10Ni-3Al (wt.%), Cu-10Ni-3Al-1Fe (wt.%), and Cu-10Ni-3Al-1Si (wt.%) alloys. The simulated concentration distribution of solutes over the dendrites indicated that Ni and Fe exhibited intra-dendrite segregation, while Al and Si demonstrated inter-dendrite segregation. The inclusion of Fe in Cu-10Ni-3Al alloys slightly increased chemical segregation, whereas the introduction of Si led to the formation of the Ni2Si phase. The addition of Fe had a minimal impact on the annealing times required to eliminate chemical segregation, while the incorporation of Si reduced the annealing times.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"20 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145226693","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}

引用次数: 0

Tuning Atomic Diffusion and Carrier Concentration in ITO Films via In-Situ Resistance Monitoring 通过原位电阻监测调整ITO薄膜中的原子扩散和载流子浓度

IF 6.2 2区材料科学

Journal of Alloys and Compounds Pub Date : 2025-10-05 DOI: 10.1016/j.jallcom.2025.184204

Gyuho Lee, Seonghoon Han, Hyeonyu Kim, Sehwan Song, Ju Hyeon Kim, Jinhyun Lee, Jisung Lee, Jong-Seong Bae, Okkyun Seo, Jiayi Tang, Sangmoon Yoon, Chang-woo Cho, Kyeong Tae Kang, Younjung Jo, Sungkyun Park, Dooyong Lee

{"title":"Tuning Atomic Diffusion and Carrier Concentration in ITO Films via In-Situ Resistance Monitoring","authors":"Gyuho Lee, Seonghoon Han, Hyeonyu Kim, Sehwan Song, Ju Hyeon Kim, Jinhyun Lee, Jisung Lee, Jong-Seong Bae, Okkyun Seo, Jiayi Tang, Sangmoon Yoon, Chang-woo Cho, Kyeong Tae Kang, Younjung Jo, Sungkyun Park, Dooyong Lee","doi":"10.1016/j.jallcom.2025.184204","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184204","url":null,"abstract":"We present a study on tuning atomic diffusion and carrier concentration in Sn-doped In2O3 (ITO) films using an in-situ resistance monitoring approach during post-annealing. By varying the annealing ramping rate and gas atmosphere, we decouple the effects of thermal kinetics and chemical environment on the crystallization behavior and electronic properties of amorphous ITO films. Our results reveal that crystallization and densification temperatures are predominantly governed by the ramping rate, while carrier concentration is strongly modulated by the gas atmosphere. Notably, the ITO film annealed in forming gas at low ramping rates exhibits enhanced conductivity and optical transmittance due to the oxygen vacancy-induced electron doping, as confirmed by hard X-ray photoelectron spectroscopy. Activation energies of the atomic diffusion in amorphous ITO films were quantified as 1.07 eV and 0.99 eV for crystallization and densification, respectively. Our findings introduce a robust, in-situ resistance monitoring strategy for precise control of structural and electronic properties in transparent conducting oxides, offering a scalable methodology for advanced optoelectronic device fabrication.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"5 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145226694","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}

引用次数: 0

Structure regulation of Zeolitic Imidazolate Framework-8 functionalized poly-m-phenyleneisophthalamide separator for enhancement on the comprehensive performance of lithium - ion batteries 沸石咪唑酸骨架-8功能化聚间苯二苯酰胺分离器的结构调控以提高锂离子电池的综合性能

IF 6.2 2区材料科学

Journal of Alloys and Compounds Pub Date : 2025-10-05 DOI: 10.1016/j.jallcom.2025.184211

Tongtong Zhang, Yingxue Sun, Zan Chen, Cuijia Duan, Claudia Li, Sibudjing Kawi, Yinhui Li

{"title":"Structure regulation of Zeolitic Imidazolate Framework-8 functionalized poly-m-phenyleneisophthalamide separator for enhancement on the comprehensive performance of lithium - ion batteries","authors":"Tongtong Zhang, Yingxue Sun, Zan Chen, Cuijia Duan, Claudia Li, Sibudjing Kawi, Yinhui Li","doi":"10.1016/j.jallcom.2025.184211","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184211","url":null,"abstract":"Safety issues remain a major barrier to the large-scale application of high-energy-density storage systems. Uneven ion flow can lead to non-uniform lithium deposition and continuous dendrite growth. These problems greatly reduce the lifespan and safety of lithium-ion batteries (LIBs). In this work, a PMIA/ZIF-8 composite separator was fabricated by in-situ growth of zeolitic imidazolate framework-8 (ZIF-8) on the surface of a poly-m-phenyleneisophthalamide (PMIA) separator prepared via non-solvent induced phase separation (NIPS). The PMIA/ZIF-8 separator exhibits outstanding electrolyte affinity (411%) and high ionic conductivity (0.81 mS cm⁻¹), which are 3.2 times and 1.53 times that of the PP separator, respectively. In terms of battery performance, the battery employing the composite separator maintains a discharge capacity of 134.5 mAh g⁻¹ after 200 cycles, significantly outperforming the cell with a PP separator (108.4 mAh g⁻¹). Furthermore, the Li||Li symmetric battery equipped with the PMIA/ZIF-8 separator achieves stable cycling for over 600 h at 1 mA cm⁻², surpassing the performance of the PP separator (200 h). This work offers a feasible strategy for developing highly safe lithium-ion battery separators capable of efficiently inhibiting lithium dendrite growth.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"8 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145226695","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}

引用次数: 0

Dual-base activation of Ipomoea Aquatica Stalk Biomass Carbon@NiS composites for high-performance supercapacitors 用于高性能超级电容器的易拉木秸秆生物质Carbon@NiS复合材料的双碱活化

IF 6.3 2区材料科学

Journal of Alloys and Compounds Pub Date : 2025-10-05 DOI: 10.1016/j.jallcom.2025.184214

Ting Yu , Siyu Ge , Zhuoran Song , Yuheng Xiao , Bing Wang , Xiaoyang Wang , Haoran Wu , Xiping Lei

{"title":"Dual-base activation of Ipomoea Aquatica Stalk Biomass Carbon@NiS composites for high-performance supercapacitors","authors":"Ting Yu , Siyu Ge , Zhuoran Song , Yuheng Xiao , Bing Wang , Xiaoyang Wang , Haoran Wu , Xiping Lei","doi":"10.1016/j.jallcom.2025.184214","DOIUrl":"10.1016/j.jallcom.2025.184214","url":null,"abstract":"<div><div>Against the background of energy crisis and increasing environmental pollution, the development of efficient and reliable electrode materials for high-performance supercapacitors has become particularly urgent. In this work, naturally layered Ipomoea aquatica stalks (IA) were used as a carbon source and co-activated with NaOH/KOH to achieve self-templated conversion of biomass, producing biomass-derived carbon (BIC) with vertical “spine-like” channels. Subsequently, by precisely controlling the deposition amount and morphology of flower-like NiS nanocrystals on the BIC surface through the in situ hydrothermal method, a BIC@NiS composite material with a multi-level pore structure, close interface bonding, and optimized hydrophilicity was successfully constructed. BIC@NiS-1 as an electrode material exhibited excellent specific capacitance (1157.8 F/g at 1 A/g) and retained 94.32 % of the capacitance after 10,000 cycles at 10 A/g current density. The assembled BIC@NiS-1//BIC asymmetric supercapacitor achieved a high energy density of 85.12 Wh/kg and a cycling stability of 73.88 % (10,000 cycles) within a voltage window of 1.8 V. This study offers a promising approach for the high-value utilization of biomass waste and lays a solid foundation for the development of supercapacitor electrode materials with both high energy density and excellent stability.</div></div>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1043 ","pages":"Article 184214"},"PeriodicalIF":6.3,"publicationDate":"2025-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145226696","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}

引用次数: 0

Defects in 2D layered TMDCs materials: Influence on photoelectric properties and their applications 二维层状TMDCs材料缺陷：对光电性能的影响及其应用

IF 6.2 2区材料科学

Journal of Alloys and Compounds Pub Date : 2025-10-04 DOI: 10.1016/j.jallcom.2025.184196

Xinyue Pan, Huaiyu Qu, Kaixi Shi, Jinhua Li, Fujun Liu, Haiyan Tao, Miaomiao Zhang

{"title":"Defects in 2D layered TMDCs materials: Influence on photoelectric properties and their applications","authors":"Xinyue Pan, Huaiyu Qu, Kaixi Shi, Jinhua Li, Fujun Liu, Haiyan Tao, Miaomiao Zhang","doi":"10.1016/j.jallcom.2025.184196","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184196","url":null,"abstract":"Two-dimensional (2D) layered transition metal dichalcogenides (TMDCs) materials have the advantages of strong light-matter interaction, high carrier mobility, and adjustable band gap, which promoted the development of optoelectronic devices. However, defects will inevitably be introduced into TMDCs materials, whether naturally exfoliated or artificially synthesized. The existence of defect will change the characteristics of the material, such as band gap, light absorption, carrier mobility, etc., and further affect the performance of TMDCs-based optoelectronic devices. Therefore, it is of great significance to in-depth understanding the types, formation causes, and the effect on the photoelectric properties of materials, and apply defect engineering to high-performance optoelectronic devices. In this paper, we reviewed the research on defects in 2D TMDCs materials in recent years, focusing on the types and causes of defects, and summarizing the characterization methods of defects. Subsequently, the influence and mechanism of defects on the materials are discussed in detail. Finally, the application of defect engineering in TMDCs-based optoelectronic devices is explored. This review provides a prospective perspective for the applications of defect control in optoelectronic devices.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"45 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145216026","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}

引用次数: 0

Effects of Si doping on microstructure, mechanical properties and oxidation resistance of FeCrAl fuel cladding alloys Si掺杂对FeCrAl燃料包层合金组织、力学性能和抗氧化性能的影响

IF 6.2 2区材料科学

Journal of Alloys and Compounds Pub Date : 2025-10-04 DOI: 10.1016/j.jallcom.2025.184122

Bao Zhang, Yingjie Qiao, Yubao Zhang, Hongtao Zhao, Zhigang Li, Hongtao Huang, Wenze Li, Jiye Guo

{"title":"Effects of Si doping on microstructure, mechanical properties and oxidation resistance of FeCrAl fuel cladding alloys","authors":"Bao Zhang, Yingjie Qiao, Yubao Zhang, Hongtao Zhao, Zhigang Li, Hongtao Huang, Wenze Li, Jiye Guo","doi":"10.1016/j.jallcom.2025.184122","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184122","url":null,"abstract":"FeCrAl alloys, as nuclear fuel cladding materials, exhibit excellent oxidation resistance, low linear expansion, neutron absorption and high-temperature mechanical properties, which provide promising options for enhancing the safety and reliability of nuclear reactors. In this study, we investigate the effect of silicon (Si) doping on the microstructure, mechanical properties, and oxidation resistance of Fe13Cr6Al alloys, tailored for nuclear fuel cladding applications. Through vacuum induction melting, Si contents of 0.1, 0.2, 0.3, and 0.4 wt.% were incorporated, with a non-doped alloy serving as a benchmark. Our findings reveal that Si doping substantially refines the grain structure, particularly evident at 0.4 wt.% Si, reducing the average grain size to 19.42 μm post-annealing at 800°C. This refinement enhances the mechanical robustness of the alloy, with the 0.4Si variant achieving the highest hardness (241.8 HV), tensile strength (628 MPa at room temperature; 573 MPa at 380°C), yield strength, and elongation at break, surpassing traditional FeCrAl materials. Additionally, Si doping curtails oxidation weight gain, evidenced by a parabolic decrease with increased Si content, and augments oxidation resistance by inducing SiO2 and Al2SiO5 phases within the oxide layer. These advancements underscore the potential of Si-doped FeCrAl alloys in fortifying nuclear reactor safety through superior cladding material performance.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"12 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145226699","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}

引用次数: 0

Fabrication, structural, and mechanical characterization of Y2O3-reinforced Apatite-Wollastonite glass-ceramics for biomedical and radiation shielding applications 用于生物医学和辐射屏蔽应用的y2o3增强磷灰石-硅灰石玻璃陶瓷的制造、结构和力学表征

IF 6.2 2区材料科学

Journal of Alloys and Compounds Pub Date : 2025-10-04 DOI: 10.1016/j.jallcom.2025.184201

M.S. Al-Buriahi, Jamila S. Alzahrani, Usman Iliyasu, Norah Alomayrah, Erhan İbrahimoğlu

{"title":"Fabrication, structural, and mechanical characterization of Y2O3-reinforced Apatite-Wollastonite glass-ceramics for biomedical and radiation shielding applications","authors":"M.S. Al-Buriahi, Jamila S. Alzahrani, Usman Iliyasu, Norah Alomayrah, Erhan İbrahimoğlu","doi":"10.1016/j.jallcom.2025.184201","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184201","url":null,"abstract":"Fabrication of Apatite-Wollastonite AW glass ceramics with varying Y2O3 of 2, 4, and 8 wt.% into the composition (CaO, SiO2, P2O5, MgO, Al2O3, CaF2) was synthesized via powder metallurgy (P/M) process. The structural analysis using X-ray diffraction (XRD) revealed the pristine AW glass-ceramic were composed of wollastonite and fluorapatite phases, which underwent structural transformation with Y2O3 addition, including Y substitution for Ca at 8 wt.% Y2O3, decreased wollastonite with an increased fluorapatite and Ca-Y-P phases, and the emergence of YPO4 phase. Energy-dispersive spectroscopy (EDS) results indicate the presence of Si, Al, Ca, Mg, P, F, and O elements in the structure. The density and hardness of the proposed samples were found to increase from 2.86 g/cm3 to 2.99 g/cm3 and 570 to 618 HV0.1 for the undoped and doped with 8 wt.% Y2O3 concentrations. The radiation attenuation properties of the Y2O3-doped Apatite-Wollastonite (AW) glass ceramics using Phy-X/PSD and PHITS show an enhancement depending on the additive concentrations. The linear attenuation coefficient (LAC) and mass attenuation coefficient (MAC) increase from 1.9447 to 4.67899 cm-1 and from 0.6799 to 1.5649 cm-1 at 0.05 MeV for the undoped AW and doped AW with Y2O3 8 wt.%. The half-value layer decreased and the effective atomic number increased with the addition of Y2O3. These results indicate that the AW glass ceramics doped with Y2O3 are promising candidates for biomedical applications.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"8 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145216021","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}

引用次数: 0

Promoting single-step shearing to improve the strength-ductility synergy in an Al-Cu-Li alloy 促进单步剪切提高铝铜锂合金的强度-塑性协同效应

IF 6.3 2区材料科学

Journal of Alloys and Compounds Pub Date : 2025-10-04 DOI: 10.1016/j.jallcom.2025.184193

Chunhui Liu , Na Liang , Peipei Ma , Sheng Ding , Lihua Zhan , Jianwei Li

{"title":"Promoting single-step shearing to improve the strength-ductility synergy in an Al-Cu-Li alloy","authors":"Chunhui Liu , Na Liang , Peipei Ma , Sheng Ding , Lihua Zhan , Jianwei Li","doi":"10.1016/j.jallcom.2025.184193","DOIUrl":"10.1016/j.jallcom.2025.184193","url":null,"abstract":"<div><div>This study investigates the correlation between strength-ductility synergy and precipitate-dislocation interactions during tensile deformation in a peak-aged Al-Cu-Li alloy, with and without pre-deformation. The solution-treated and peak-aged (ST-PA, T6 temper) specimen exhibits a yield strength of 554 MPa but limited ductility (3.1 % elongation to failure). Pre-deformation (2–8 %) doubles elongation while modestly enhancing strength. Although pre-deformation negligibly alters grain structure, it narrows precipitate-free zones (PFZs). Microstructural analysis reveals that plate-like T1 precipitates with high aspect ratios dominate strengthening. Pre-deformation effectively refines these precipitates, reducing the proportion of multilayer T1 precipitates (2–3 unit-cell thickness) from 46 % to < 20 %. During tensile straining, multilayer T1 precipitates undergo either large-displacement shearing or rotation by bypassing dislocations, inducing matrix distortion and significant local dislocation accumulation. In contrast, monolayer T1 precipitates with a thickness of one unit-cell facilitate single-step shearing with a displacement of only one atomic layer, promoting uniform dislocation slip and suppressing Orowan loop formation. Additional shearing of δ′/θ′/δ′ precipitates in pre-deformed alloys further mitigates local stress concentration. These findings provide mechanistic insights for enhancing uniform deformation capacity and offer guidelines for optimizing precipitation to achieve optimized strength-ductility balance in Al-Cu-Li alloys.</div></div>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1043 ","pages":"Article 184193"},"PeriodicalIF":6.3,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145216023","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}

引用次数: 0

Yellow to Orange-red Tunable Broadband-emitting (Ca, Sr)O:Ce3+ Solid Solution Phosphors for Plant Growth Application 黄至橘红色可调谐宽带发射（Ca, Sr）O:Ce3+固溶体荧光粉，用于植物生长

IF 6.2 2区材料科学

Journal of Alloys and Compounds Pub Date : 2025-10-04 DOI: 10.1016/j.jallcom.2025.184195

Chunxu Bao, Cancan Li, Yuhua Wang, Takatoshi Seto

{"title":"Yellow to Orange-red Tunable Broadband-emitting (Ca, Sr)O:Ce3+ Solid Solution Phosphors for Plant Growth Application","authors":"Chunxu Bao, Cancan Li, Yuhua Wang, Takatoshi Seto","doi":"10.1016/j.jallcom.2025.184195","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184195","url":null,"abstract":"The application of light conversion materials provides a new approach to improving plant photosynthetic efficiency and promoting plant growth. We have prepared (Ca, Sr)O:Ce3+ phosphors and observed two unique phenomena within them: 1) the red shift of Ce3+ emission from 568 nm (CaO:Ce3+) to 600 nm (Ca0.2Sr0.8O:Ce3+) while the excitation remains unchanged (470 nm); 2) self-luminescence from the (Ca, Sr)O host lattice. Structural refinement data prove that the emission red shift is due to the expansion of the lattice resulting in a more relaxed coordination environment, while an idea of looser excitation state curve was consistent with a phenomenon “invariance of excitation energy”. Evidence from the fluorescence lifetime ultimately confirms that the self-luminescence of the host lattice should be attributed to color centers within the lattice. Considering the red light ratio and emission intensity, Ca0.7Sr0.3O:Ce3+ is the most suitable phosphor. In the Chlorella growth experiment, the experimental group using the Ca0.7Sr0.3O:Ce3+ light conversion film achieved a final OD value 21% higher than the blank control group. All the above results indicate that the sunlight conversion films prepared from Ca0.7Sr0.3O:Ce3+ phosphors have great potential in promoting plant growth.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"55 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145216159","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}

引用次数: 0