Optimizing the solidification structure and improving the mechanical performance of Al-Si alloys rely heavily on the refinement of α-Al grains and the modification of eutectic Si. However, conventional grain refiners (e.g., Al-Ti-B) and modifiers (e.g., Sr) often suffer from multiple “poisoning effects.” To address this, the development of refiners capable of simultaneously promoting α-Al grain refinement and eutectic Si modification in Al-Si alloys has emerged as a central research objective. In this study, a multifunctional Al-5La-1B inoculant with a dual-phase structure was successfully designed and synthesized using the melt reaction method. A comparative investigation was carried out to evaluate how Al-5La-1B and the conventional Al-5Ti-1B/Sr combination influence the microstructure and mechanical behavior of Al-7Si alloys. Regarding α-Al grain refinement, the Al-5La-1B inoculant exhibited a refinement efficiency of 78.1%, significantly outperforming the conventional Al-5Ti-1B (31.5%). For eutectic Si modification, the Al-7Si alloy inoculated with Al-5La-1B showed a smaller average eutectic Si size (1.46 μm) and aspect ratio (1.79), both lower than those achieved with Sr modification. Benefiting from the refined α-Al grains, transformed eutectic Si morphology, and the formation of abundant intersecting twins and stacking faults within Si, the Al-7Si alloy treated with Al-5La-1B exhibited a tensile strength of 177 MPa and yield strength of 109 MPa—enhancements of 8.6% and 7.9% compared with the Al-5Ti-1B/Sr-treated alloy. This work elucidates the underlying mechanisms of α-Al grain refinement and Si modification in Al-Si alloys and provides a short-process, cost-effective, and highly efficient strategy for the design of multifunctional inoculants.
{"title":"Synergistic Control of α-Al Grain Refinement and Eutectic Si Modification Enabled by the Novel Al-5La-1B Inoculant","authors":"Wenxin Zhai, Wei Yu, Yishan Wang, Kaixi Jiang, Yu Bai, Hai Hao","doi":"10.1016/j.jallcom.2026.186705","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.186705","url":null,"abstract":"Optimizing the solidification structure and improving the mechanical performance of Al-Si alloys rely heavily on the refinement of α-Al grains and the modification of eutectic Si. However, conventional grain refiners (e.g., Al-Ti-B) and modifiers (e.g., Sr) often suffer from multiple “poisoning effects.” To address this, the development of refiners capable of simultaneously promoting α-Al grain refinement and eutectic Si modification in Al-Si alloys has emerged as a central research objective. In this study, a multifunctional Al-5La-1B inoculant with a dual-phase structure was successfully designed and synthesized using the melt reaction method. A comparative investigation was carried out to evaluate how Al-5La-1B and the conventional Al-5Ti-1B/Sr combination influence the microstructure and mechanical behavior of Al-7Si alloys. Regarding α-Al grain refinement, the Al-5La-1B inoculant exhibited a refinement efficiency of 78.1%, significantly outperforming the conventional Al-5Ti-1B (31.5%). For eutectic Si modification, the Al-7Si alloy inoculated with Al-5La-1B showed a smaller average eutectic Si size (1.46 μm) and aspect ratio (1.79), both lower than those achieved with Sr modification. Benefiting from the refined α-Al grains, transformed eutectic Si morphology, and the formation of abundant intersecting twins and stacking faults within Si, the Al-7Si alloy treated with Al-5La-1B exhibited a tensile strength of 177<!-- --> <!-- -->MPa and yield strength of 109<!-- --> <!-- -->MPa—enhancements of 8.6% and 7.9% compared with the Al-5Ti-1B/Sr-treated alloy. This work elucidates the underlying mechanisms of α-Al grain refinement and Si modification in Al-Si alloys and provides a short-process, cost-effective, and highly efficient strategy for the design of multifunctional inoculants.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"94 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2026-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146138374","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}
The CrFeNi medium-entropy alloy (MEA) is a promising candidate for advanced engineering applications. However, its insufficient strength limits its use in structural components. To improve the strength-ductility synergy, a harmonic structure (HS) was engineered in this alloy, featuring coarse-grained “core” regions surrounded by a network of fine-grained “shell” zones, through controlled mechanical milling followed by sintering. By varying two milling parameters — filling ratio (FR) and milling time — the HS architecture and mechanical properties of alloy were precisely tuned. The results show that stepwise reductions in FR from 0.350 to 0.117 and then to 0.058 progressively modify the deformation behavior of milled powders, from incomplete peripheral deformation to substantial deformation including distortion, and finally to moderate deformation. These changes correlate with shifts in the ball motion pattern from centrifugation/rolling through cataracting to cascading. The microstructural characteristics, specifically the “shell” fraction (fshell), and the alloy strength exhibit a rise-and-fall trend with decreasing FR. The optimal FR value of 0.058 promotes a favorable HS configuration with moderate fshell and a continuous “shell”, thereby enabling the alloy to achieve a superior strength-ductility balance. Prolonged milling from 50 h to 200 h thickens surface deformation layers and promotes agglomeration in the milled powders, significantly increasing fshell and undesirable lamellar structures in HS. This evolution enhances alloy strength mainly through hetero-deformation induced (HDI) strengthening, but gradually reduces ductility, as the increased HDI hardening resulting from elevated fshell fails to offset the diminished forest hardening due to grain refinement. This study identifies the optimal milling parameters for producing a strong and ductile CrFeNi alloy.
{"title":"Engineering harmonic structure in CrFeNi medium-entropy alloy via milling parameter optimization for enhanced mechanical performance","authors":"Pei Wang, Zhichao He, Zhenkai Qi, Yuqin Wu, Xiao Wu, Zhigang Yuan, Youjing Zhang, Xingwang Cheng","doi":"10.1016/j.jallcom.2026.186737","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.186737","url":null,"abstract":"The CrFeNi medium-entropy alloy (MEA) is a promising candidate for advanced engineering applications. However, its insufficient strength limits its use in structural components. To improve the strength-ductility synergy, a harmonic structure (HS) was engineered in this alloy, featuring coarse-grained “core” regions surrounded by a network of fine-grained “shell” zones, through controlled mechanical milling followed by sintering. By varying two milling parameters — filling ratio (FR) and milling time — the HS architecture and mechanical properties of alloy were precisely tuned. The results show that stepwise reductions in FR from 0.350 to 0.117 and then to 0.058 progressively modify the deformation behavior of milled powders, from incomplete peripheral deformation to substantial deformation including distortion, and finally to moderate deformation. These changes correlate with shifts in the ball motion pattern from centrifugation/rolling through cataracting to cascading. The microstructural characteristics, specifically the “shell” fraction (<em>f</em><sub>shell</sub>), and the alloy strength exhibit a rise-and-fall trend with decreasing FR. The optimal FR value of 0.058 promotes a favorable HS configuration with moderate <em>f</em><sub>shell</sub> and a continuous “shell”, thereby enabling the alloy to achieve a superior strength-ductility balance. Prolonged milling from 50<!-- --> <!-- -->h to 200<!-- --> <!-- -->h thickens surface deformation layers and promotes agglomeration in the milled powders, significantly increasing <em>f</em><sub>shell</sub> and undesirable lamellar structures in HS. This evolution enhances alloy strength mainly through hetero-deformation induced (HDI) strengthening, but gradually reduces ductility, as the increased HDI hardening resulting from elevated <em>f</em><sub>shell</sub> fails to offset the diminished forest hardening due to grain refinement. This study identifies the optimal milling parameters for producing a strong and ductile CrFeNi alloy.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"312 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2026-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146138375","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}
Pub Date : 2026-02-09DOI: 10.1016/j.jallcom.2026.186709
Abhijeet R. Kadam, R.B. Aurade, S.J. Dhoble
Oxide perovskite phosphors have attracted considerable interest for applications in solid-state lighting, particularly phosphor-converted white light-emitting diodes (pc-WLEDs), as well as spectral management in photovoltaic devices. In this work, Dy³⁺, Tb³⁺, and Eu³⁺ ions were singly doped, co-doped, and tri-doped into a LaAlO₃ host to investigate their luminescence behavior and energy transfer characteristics. The tri-doped phosphors exhibit intense and tunable multicolor emission suitable for white light generation, arising from the combined contributions of Dy³⁺, Tb³⁺, and Eu³⁺ ions, resulting in balanced white or near-white light emission under near-UV excitation. Efficient cascade energy transfer among Dy³⁺ → Tb³⁺ → Eu³⁺ ions plays a key role in enhancing emission intensity and color quality relevant to WLED applications. In addition, the optimized phosphor demonstrates potential applicability as a downconversion layer for improving light utilization in dye-sensitized solar cells. These results highlight the suitability of LaAlO₃:Dy³⁺/Tb³⁺/Eu³⁺ phosphors for pc-WLED-based solid-state lighting, with additional relevance to photovoltaic enhancement.
{"title":"Harnessing Multicolour Photoluminescence from Dy3+/Tb3+/Eu3+ Doped LaAlO3 for High-Performance White LEDs and Dye-Sensitized Solar Cells","authors":"Abhijeet R. Kadam, R.B. Aurade, S.J. Dhoble","doi":"10.1016/j.jallcom.2026.186709","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.186709","url":null,"abstract":"Oxide perovskite phosphors have attracted considerable interest for applications in solid-state lighting, particularly phosphor-converted white light-emitting diodes (pc-WLEDs), as well as spectral management in photovoltaic devices. In this work, Dy³⁺, Tb³⁺, and Eu³⁺ ions were singly doped, co-doped, and tri-doped into a LaAlO₃ host to investigate their luminescence behavior and energy transfer characteristics. The tri-doped phosphors exhibit intense and tunable multicolor emission suitable for white light generation<strong>,</strong> arising from the combined contributions of Dy³⁺, Tb³⁺, and Eu³⁺ ions, resulting in balanced white or near-white light emission under near-UV excitation. Efficient cascade energy transfer among Dy³⁺ → Tb³⁺ → Eu³⁺ ions plays a key role in enhancing emission intensity and color quality relevant to WLED applications. In addition, the optimized phosphor demonstrates potential applicability as a downconversion layer for improving light utilization in dye-sensitized solar cells. These results highlight the suitability of LaAlO₃:Dy³⁺/Tb³⁺/Eu³⁺ phosphors for pc-WLED-based solid-state lighting, with additional relevance to photovoltaic enhancement.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"4 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2026-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146138373","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}
Pub Date : 2026-02-09DOI: 10.1016/j.jallcom.2026.186742
Xiang Zhang, Qiang Wang, Kun Fu, Xiaolei Su
The nature of bonding (ionic vs. covalent) at the heterointerface impacts MXene-based composites’ electromagnetic performance. Modulating bonding types and their effects on charge dynamics is challenging. This study controls bonding in LaF3/Ti3C2Tx heterostructures via in-situ growth, focusing on ionic/covalent differences in charge transfer and energy dissipation. LaF3 has ionic bonding (F--La3+ electrostatic interactions), while Ti3C2Tx shows mixed metallic-covalent bonding (electron - delocalized Ti-C). At the interface, bonding disparity drives directional charge transfer (La3+-Ti3C2Tx), forming interfacial dipoles. This enhances electromagnetic loss: LaF3’s ionic bonding induces dipole polarization, and Ti3C2Tx’s covalent interactions enable conductive loss. Findings highlight bonding engineering for optimizing MXene absorbers, providing a framework for tailoring properties via interfacial bonding regulation.
{"title":"Preparation and Microwave absorption property of LaF3/Ti3C2Tx heterostructure composite","authors":"Xiang Zhang, Qiang Wang, Kun Fu, Xiaolei Su","doi":"10.1016/j.jallcom.2026.186742","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.186742","url":null,"abstract":"The nature of bonding (ionic vs. covalent) at the heterointerface impacts MXene-based composites’ electromagnetic performance. Modulating bonding types and their effects on charge dynamics is challenging. This study controls bonding in LaF<sub>3</sub>/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> heterostructures via in-situ growth, focusing on ionic/covalent differences in charge transfer and energy dissipation. LaF<sub>3</sub> has ionic bonding (F<sup>-</sup>-La<sup>3+</sup> electrostatic interactions), while Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> shows mixed metallic-covalent bonding (electron - delocalized Ti-C). At the interface, bonding disparity drives directional charge transfer (La<sup>3+</sup>-Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>), forming interfacial dipoles. This enhances electromagnetic loss: LaF<sub>3</sub>’s ionic bonding induces dipole polarization, and Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>’s covalent interactions enable conductive loss. Findings highlight bonding engineering for optimizing MXene absorbers, providing a framework for tailoring properties via interfacial bonding regulation.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"45 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2026-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146138420","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}
Photocatalytic technology offers an environmentally friendly and energy-efficient approach to treating organic pollutants and heavy metals in water, yet its widespread application is hindered by limited photocatalytic activity and challenges in catalyst recovery. In this study, a novel Z-scheme NiS/g-C₃N₄ composite was synthesized via a hydrothermal method. The composite exhibits an enlarged specific surface area, promotes the separation of photogenerated charge carriers, and effectively suppresses their recombination. Unlike conventional photocatalysts that often favor either oxidation or reduction, the NiS/g-C3N4 composite demonstrates simultaneous and efficient photo-oxidation and photo-reduction capabilities. The kinetic rate for photocatalytic reduction of Cr(VI) is 16.6 times higher than that of pure g-C3N4. The MB degradation rate constant is about 3.9 times greater than that of pure NiS. Reaction mechanisms were elucidated through radical trapping experiments and intermediate analysis. Toxicity assays and mung bean growth experiments confirmed a significant reduction in solution toxicity after treatment. Furthermore, to address practical recovery issues, the NiS/g-C3N4 catalyst was incorporated into a polyvinylidene fluoride (PVDF) membrane. The resulting NiS/g-C3N4/PVDF composite membrane exhibited excellent photocatalytic stability over 15 hours of cyclic operation. This work provides valuable insights for designing efficient and recoverable photocatalytic systems, advancing the development of sustainable water purification technologies.
{"title":"Construction of a NiS/g-C3N4 Heterojunction for Highly Efficient Visible-Light-Driven Photocatalytic Cr(VI) Reduction and Dye Degradation","authors":"Ying-Ying Zhang, Jin-Tao Huang, Qing-Tong Dong, Quan-Liang Chen","doi":"10.1016/j.jallcom.2026.186727","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.186727","url":null,"abstract":"Photocatalytic technology offers an environmentally friendly and energy-efficient approach to treating organic pollutants and heavy metals in water, yet its widespread application is hindered by limited photocatalytic activity and challenges in catalyst recovery. In this study, a novel Z-scheme NiS/g-C₃N₄ composite was synthesized via a hydrothermal method. The composite exhibits an enlarged specific surface area, promotes the separation of photogenerated charge carriers, and effectively suppresses their recombination. Unlike conventional photocatalysts that often favor either oxidation or reduction, the NiS/g-C<sub>3</sub>N<sub>4</sub> composite demonstrates simultaneous and efficient photo-oxidation and photo-reduction capabilities. The kinetic rate for photocatalytic reduction of Cr(VI) is 16.6 times higher than that of pure g-C<sub>3</sub>N<sub>4</sub>. The MB degradation rate constant is about 3.9 times greater than that of pure NiS. Reaction mechanisms were elucidated through radical trapping experiments and intermediate analysis. Toxicity assays and mung bean growth experiments confirmed a significant reduction in solution toxicity after treatment. Furthermore, to address practical recovery issues, the NiS/g-C<sub>3</sub>N<sub>4</sub> catalyst was incorporated into a polyvinylidene fluoride (PVDF) membrane. The resulting NiS/g-C<sub>3</sub>N<sub>4</sub>/PVDF composite membrane exhibited excellent photocatalytic stability over 15<!-- --> <!-- -->hours of cyclic operation. This work provides valuable insights for designing efficient and recoverable photocatalytic systems, advancing the development of sustainable water purification technologies.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"23 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2026-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146138376","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}
Alkaline water electrolysis for hydrogen production is limited by sluggish oxygen evolution reaction (OER) process. NiFe-layered double hydroxide (NiFe-LDH) represents a highly promising OER catalyst. However, its inferior stability and inadequate catalytic activity hinder its ability to meet the requirements of industrial water electrolysis. Herein, we synthesized MoO42− intercalated NiFe-LDH (Mo-NiFe LDH-0.10) with nanoflower-like crystalline/amorphous hybrid architecture via a simple ambient-temperature reduction strategy. Benefiting from the synergistic regulation of catalyst morphology, crystal structure, and electronic structure by MoO42– intercalation, Mo-NiFe LDH-0.10 delivers outstanding catalytic properties with an OER overpotential of merely 350 mV at 100 mA cm–2 and exceptional long-term durability. Experiments and theoretical calculations demonstrate that intercalated MoO42− anions function as dynamic mediators, facilitating Ni sites reconstruction and accelerating OER through a potential-dependent dual-pathway mechanism. As a performance validation, the assembled anion exchange membrane water electrolysis (AEMWE) achieves 1.0 A cm–2 at a cell voltage of 2.08 V and operates stably for 200 h at 0.5 A cm–2. This study establishes a facile and scalable strategy for fabricating OER electrocatalysts with synergistically optimized morphology and microstructure, thereby facilitating the development of AEMWE technology.
{"title":"Synergistic Regulation of Morphology and Microstructure in NiFe-Based Catalysts via Molybdate Oxyanion Intercalation for Enhanced Alkaline Water Electrooxidation","authors":"Yonggan Wu, Lina Jiang, Wenbo Wei, Yongshang Zhang, Lulu Du, Lixiang Wang, Kin-tak Lau, Linsen Zhang","doi":"10.1016/j.jallcom.2026.186752","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.186752","url":null,"abstract":"Alkaline water electrolysis for hydrogen production is limited by sluggish oxygen evolution reaction (OER) process. NiFe-layered double hydroxide (NiFe-LDH) represents a highly promising OER catalyst. However, its inferior stability and inadequate catalytic activity hinder its ability to meet the requirements of industrial water electrolysis. Herein, we synthesized MoO<sub>4</sub><sup>2−</sup> intercalated NiFe-LDH (Mo-NiFe LDH-0.10) with nanoflower-like crystalline/amorphous hybrid architecture via a simple ambient-temperature reduction strategy. Benefiting from the synergistic regulation of catalyst morphology, crystal structure, and electronic structure by MoO<sub>4</sub><sup>2–</sup> intercalation, Mo-NiFe LDH-0.10 delivers outstanding catalytic properties with an OER overpotential of merely 350<!-- --> <!-- -->mV at 100<!-- --> <!-- -->mA<!-- --> <!-- -->cm<sup>–2</sup> and exceptional long-term durability. Experiments and theoretical calculations demonstrate that intercalated MoO<sub>4</sub><sup>2−</sup> anions function as dynamic mediators, facilitating Ni sites reconstruction and accelerating OER through a potential-dependent dual-pathway mechanism. As a performance validation, the assembled anion exchange membrane water electrolysis (AEMWE) achieves 1.0<!-- --> <!-- -->A<!-- --> <!-- -->cm<sup>–2</sup> at a cell voltage of 2.08<!-- --> <!-- -->V and operates stably for 200<!-- --> <!-- -->h at 0.5<!-- --> <!-- -->A<!-- --> <!-- -->cm<sup>–2</sup>. This study establishes a facile and scalable strategy for fabricating OER electrocatalysts with synergistically optimized morphology and microstructure, thereby facilitating the development of AEMWE technology.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2026-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146138419","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}
Pub Date : 2026-02-09DOI: 10.1016/j.jallcom.2026.186751
Xiaoyun Zhang, Ying Cui, Tao Qin, Muxin Liu, Jinlong Ge
The sluggish kinetics of the oxygen evolution reaction (OER) impede the development of water splitting for hydrogen production. Replacing the anodic oxygen evolution reaction by urea oxidation reaction (UOR) can reduce the thermodynamic equilibrium potential and improve the hydrogen production efficiency. In this work, a NiFe-LDH/CuO heterostructure was constructed via a two-step electrochemical deposition process for both OER and UOR. The nanorod-sheet NiFe-LDH/CuO showed fast electron transfer rate for the CuO nanorod and exposed more active sites for the NiFe-LDH nanosheet. The electron redistribution and d-band center optimization induced by the heterostructure of NiFe-LDH/CuO as revealed by DFT calculation. The synthesized heterostructure catalyst only required overpotential of 238 mV for OER and potential of 1.231 V for UOR, respectively.
{"title":"In-situ growth of NiFe-LDH/CuO nanorod-sheet heterostructure for oxygen evolution reaction and urea oxidation reaction","authors":"Xiaoyun Zhang, Ying Cui, Tao Qin, Muxin Liu, Jinlong Ge","doi":"10.1016/j.jallcom.2026.186751","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.186751","url":null,"abstract":"The sluggish kinetics of the oxygen evolution reaction (OER) impede the development of water splitting for hydrogen production. Replacing the anodic oxygen evolution reaction by urea oxidation reaction (UOR) can reduce the thermodynamic equilibrium potential and improve the hydrogen production efficiency. In this work, a NiFe-LDH/CuO heterostructure was constructed via a two-step electrochemical deposition process for both OER and UOR. The nanorod-sheet NiFe-LDH/CuO showed fast electron transfer rate for the CuO nanorod and exposed more active sites for the NiFe-LDH nanosheet. The electron redistribution and d-band center optimization induced by the heterostructure of NiFe-LDH/CuO as revealed by DFT calculation. The synthesized heterostructure catalyst only required overpotential of 238<!-- --> <!-- -->mV for OER and potential of 1.231<!-- --> <!-- -->V for UOR, respectively.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"59 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2026-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146138377","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}
Pub Date : 2026-02-08DOI: 10.1016/j.jallcom.2026.186715
Nahui Ding, Lifeng Zhang, Jin Zhang, Guoxin Zhang, Lei Wang, Xiaojuan Lai
{"title":"Hierarchical and heterostructured MnS/MoS2@C nanorods for stable sodium-ion storage","authors":"Nahui Ding, Lifeng Zhang, Jin Zhang, Guoxin Zhang, Lei Wang, Xiaojuan Lai","doi":"10.1016/j.jallcom.2026.186715","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.186715","url":null,"abstract":"","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"94 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2026-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146138442","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}
Pub Date : 2026-02-08DOI: 10.1016/j.jallcom.2026.186703
Ziheng Qu, Liwei Lu, Yiquan Li, Ruicheng Mao, Haoran Pang, Gang Liu, Yujuan Wu, Lei Jing
{"title":"Microstructural analysis and tensile properties of Mg-1.8Nd-0.4Zr-0.3Ca alloy processed by asymmetric upsetting shear extrusion","authors":"Ziheng Qu, Liwei Lu, Yiquan Li, Ruicheng Mao, Haoran Pang, Gang Liu, Yujuan Wu, Lei Jing","doi":"10.1016/j.jallcom.2026.186703","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.186703","url":null,"abstract":"","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"98 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2026-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146138437","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}
In order to develop high-entropy alloys (HEAs) with excellent combined magnetic and mechanical properties, the effects of heat treatment on the microstructure, mechanical properties and magnetic properties of Fe3Co3NiAl0.4Ti0.1 HEAs and their potential mechanisms are systematically investigated in this study. The results reveal a reversible phase transformation from a single FCC phase to an FCC/BCC dual-phase structure and back to a single FCC phase upon heat treatment. Following 700 °C annealing, the alloys are characterized by a homogeneous fine-grained FCC/BCC dual-phase microstructure with an average grain size of 2.31 µm and a retained dislocation density as high as 7.23×1014 m⁻². Fe3Co3NiAl0.4Ti0.1 HEAs treated at 700 °C after cold rolling exhibits excellent synergies between mechanical and magnetic properties. The yield strength, ultimate tensile strength and elongation reach 191.6 MPa, 845.2 MPa and 18.1%, respectively. This high strength originates from the linear superposition of grain boundary strengthening, dislocation strengthening and precipitation strengthening via the Orowan mechanism. In addition, Fe3Co3NiAl0.4Ti0.1 HEAs accompany a high saturation magnetization of 150.5 emu/g. However, the coercivity increases markedly to 5506.8 A/m, which is primarily attributed to the strong pinning of magnetic domain walls by the refined grains. Additionally, high dislocation density contributes synergistically to the enhanced coercivity through a strain-induced "strengthened grain-boundary" mechanism, where dislocations at grain boundaries generate internal stress that impedes the motion of magnetic domain walls.
{"title":"Synergistic mechanical-magnetic properties in Fe3Co3NiAl0.4Ti0.1 high-entropy alloys with FCC/BCC dual-phase structure","authors":"Gaoxiang Wei, Zhiqin Wen, Jing Wang, Jiyuan Huang, Suzhen Kang, ZhiChong Wang, Liangyong Qin, Cancheng Han, Yuhong Zhao","doi":"10.1016/j.jallcom.2026.186720","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.186720","url":null,"abstract":"In order to develop high-entropy alloys (HEAs) with excellent combined magnetic and mechanical properties, the effects of heat treatment on the microstructure, mechanical properties and magnetic properties of Fe<sub>3</sub>Co<sub>3</sub>NiAl<sub>0.4</sub>Ti<sub>0.1</sub> HEAs and their potential mechanisms are systematically investigated in this study. The results reveal a reversible phase transformation from a single FCC phase to an FCC/BCC dual-phase structure and back to a single FCC phase upon heat treatment. Following 700 °C annealing, the alloys are characterized by a homogeneous fine-grained FCC/BCC dual-phase microstructure with an average grain size of 2.31<!-- --> <!-- -->µm and a retained dislocation density as high as 7.23×10<sup>14<!-- --> </sup>m⁻². Fe<sub>3</sub>Co<sub>3</sub>NiAl<sub>0.4</sub>Ti<sub>0.1</sub> HEAs treated at 700 °C after cold rolling exhibits excellent synergies between mechanical and magnetic properties. The yield strength, ultimate tensile strength and elongation reach 191.6<!-- --> <!-- -->MPa, 845.2<!-- --> <!-- -->MPa and 18.1%, respectively. This high strength originates from the linear superposition of grain boundary strengthening, dislocation strengthening and precipitation strengthening via the Orowan mechanism. In addition, Fe<sub>3</sub>Co<sub>3</sub>NiAl<sub>0.4</sub>Ti<sub>0.1</sub> HEAs accompany a high saturation magnetization of 150.5<!-- --> <!-- -->emu/g. However, the coercivity increases markedly to 5506.8<!-- --> <!-- -->A/m, which is primarily attributed to the strong pinning of magnetic domain walls by the refined grains. Additionally, high dislocation density contributes synergistically to the enhanced coercivity through a strain-induced \"strengthened grain-boundary\" mechanism, where dislocations at grain boundaries generate internal stress that impedes the motion of magnetic domain walls.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"5 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2026-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146138379","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：