Pub Date : 2025-12-13DOI: 10.1016/j.jallcom.2025.185587
Tiantian Cao, Qiaolin Li, Gang Chen, Hongtao Guan, Chengjun Dong
Sensitive and selective acetone detection is critical for environmental monitoring and disease diagnostics, yet current sensors suffer from high operating temperatures and insufficient sensitivity. This study innovatively proposes an electrostatic self-assembly strategy to uniformly anchor small ZnFe2O4 nanoparticles (around 20 nm) onto MOF-derived one-dimensional (1D) hollow In2O3 nanotubes, leading to the successful construction of an In2O3@ZnFe2O4 core-shell heterostructure. The sensor based on In2O3@ZnFe2O4-7.5 exhibits a high response of 278 to 200 ppm acetone at 200 °C, a low detection limit of 50 ppb with response of 1.85, good stability and moisture resistance. It is believed that the excellent sensing performance mainly originated in the formation of n-n heterojunction interfaces to enhance interfacial charge transfer and the effective suppression of ZnFe2O4 aggregation. Thus, this work provides a facile strategy for the fabrication of heterojunction for gas sensors.
{"title":"1D hollow In2O3@ZnFe2O4 core-shell heterostructure for enhanced ppb-level acetone detection","authors":"Tiantian Cao, Qiaolin Li, Gang Chen, Hongtao Guan, Chengjun Dong","doi":"10.1016/j.jallcom.2025.185587","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.185587","url":null,"abstract":"Sensitive and selective acetone detection is critical for environmental monitoring and disease diagnostics, yet current sensors suffer from high operating temperatures and insufficient sensitivity. This study innovatively proposes an electrostatic self-assembly strategy to uniformly anchor small ZnFe<sub>2</sub>O<sub>4</sub> nanoparticles (around 20<!-- --> <!-- -->nm) onto MOF-derived one-dimensional (1D) hollow In<sub>2</sub>O<sub>3</sub> nanotubes, leading to the successful construction of an In<sub>2</sub>O<sub>3</sub>@ZnFe<sub>2</sub>O<sub>4</sub> core-shell heterostructure. The sensor based on In<sub>2</sub>O<sub>3</sub>@ZnFe<sub>2</sub>O<sub>4</sub>-7.5 exhibits a high response of 278 to 200 ppm acetone at 200 °C, a low detection limit of 50 ppb with response of 1.85, good stability and moisture resistance. It is believed that the excellent sensing performance mainly originated in the formation of n-n heterojunction interfaces to enhance interfacial charge transfer and the effective suppression of ZnFe<sub>2</sub>O<sub>4</sub> aggregation. Thus, this work provides a facile strategy for the fabrication of heterojunction for gas sensors.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"15 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145732203","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 : 2025-12-13DOI: 10.1016/j.jallcom.2025.185531
John Samson Khalkho, Dagarapu Benny Karunakar
The superior strength of 7075 aluminium alloys is predominantly derived from precipitation hardening. Heat treatment governs the evolution of these precipitates and when coupled with cryo-deformation offers a viable pathway to further enhance both strength and ductility. This investigation first involves developing AA7075 composites reinforced with 1, 3, 5, and 7wt.% TaC through stir casting. Following this, the study explores the impact of cryo-forging on the AA7075/5wt.% TaC composite, applying different cooling methods i.e. furnace cooling (FC), air cooling (AC), and water quenching (WQ) to optimize mechanical performance. The microstructural evolution of the processed samples was examined using FESEM-EDX, XRD, EBSD, and HRTEM, and correlated with microhardness and tensile properties. Results indicate progressive grain refinement from FC to WQ conditions, with an average grain size of 59µm, alongside increased precipitation, with an average particle size of 88nm. Among all conditions, the cryo-forged (WQ) sample exhibited the highest microhardness (197 Hv), yield strength (521MPa), and ultimate tensile strength (565MPa), while the cryo-forged (FC) condition provided superior elongation (18.7%). The enhancement in strength was primarily attributed to dislocation and precipitation strengthening, whereas improved ductility was linked to reduced grain boundary area and lower dislocation density. This study introduces a novel processing route that combines cryo-forging of TaC-reinforced AA7075 with controlled cooling to achieve substantial microstructural refinement and strength enhancement. The integrated approach yields approximately a 1.4-times increase in hardness, a 2.7-times increase in yield strength, a 2.2-times increase in UTS, and an eight-times improvement in elongation compared to the unprocessed AA7075/5wt.% TaC composite.
{"title":"Mechanistic Insights into Cryo-Deformation and Cooling Medium Induced Strengthening in AA7075-TaC Composites","authors":"John Samson Khalkho, Dagarapu Benny Karunakar","doi":"10.1016/j.jallcom.2025.185531","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.185531","url":null,"abstract":"The superior strength of 7075 aluminium alloys is predominantly derived from precipitation hardening. Heat treatment governs the evolution of these precipitates and when coupled with cryo-deformation offers a viable pathway to further enhance both strength and ductility. This investigation first involves developing AA7075 composites reinforced with 1, 3, 5, and 7<ce:hsp sp=\"0.25\"></ce:hsp>wt.% TaC through stir casting. Following this, the study explores the impact of cryo-forging on the AA7075/5<ce:hsp sp=\"0.25\"></ce:hsp>wt.% TaC composite, applying different cooling methods i.e. furnace cooling (FC), air cooling (AC), and water quenching (WQ) to optimize mechanical performance. The microstructural evolution of the processed samples was examined using FESEM-EDX, XRD, EBSD, and HRTEM, and correlated with microhardness and tensile properties. Results indicate progressive grain refinement from FC to WQ conditions, with an average grain size of 59<ce:hsp sp=\"0.25\"></ce:hsp>µm, alongside increased precipitation, with an average particle size of 88<ce:hsp sp=\"0.25\"></ce:hsp>nm. Among all conditions, the cryo-forged (WQ) sample exhibited the highest microhardness (197 Hv), yield strength (521<ce:hsp sp=\"0.25\"></ce:hsp>MPa), and ultimate tensile strength (565<ce:hsp sp=\"0.25\"></ce:hsp>MPa), while the cryo-forged (FC) condition provided superior elongation (18.7%). The enhancement in strength was primarily attributed to dislocation and precipitation strengthening, whereas improved ductility was linked to reduced grain boundary area and lower dislocation density. This study introduces a novel processing route that combines cryo-forging of TaC-reinforced AA7075 with controlled cooling to achieve substantial microstructural refinement and strength enhancement. The integrated approach yields approximately a 1.4-times increase in hardness, a 2.7-times increase in yield strength, a 2.2-times increase in UTS, and an eight-times improvement in elongation compared to the unprocessed AA7075/5<ce:hsp sp=\"0.25\"></ce:hsp>wt.% TaC composite.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"9 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145753502","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 preparation of high-performance SiC reticulated porous ceramics (SRPC) is critical to ensuring the long-term service of SiC porous media burners. Aiming to synergistically improve the strength and oxidation resistance of the SRPC with multi-layered struts, residual stress was intentionally induced within the anti-oxidation layer by adjusting the coefficient of thermal expansion (CTE). The SRPC was prepared via SiC slurry coating and vacuum infiltration of alumina composite slurry, followed by spraying of LaAlO3 slurry, whose struts included SiC skeleton, transition layers and infrared radiation coating. Results showed that the residual compressive stress generated within anti-oxidation layer when the andalusite was introduced, resulting in an enhanced strength and water-oxygen corrosion resistance. The anti-oxidation layer with ZrO2 addition was peeling off due to the formed residual tensile stress. After 10hours of water-oxygen corrosion, the compression strength of the SRPC coated with LaAlO3 coating did not decrease, which was related to the formation of rod-like whiskers in the coating. This study provides valuable guidance for the preparation of medium materials utilized in high-temperature porous medium combustion.
{"title":"Improvement of the strength and water-oxygen corrosion resistance of SiC reticulated porous ceramics via residual compressive stress","authors":"Zhe Wu, Xiong Liang, Yawei Li, Jian Tie, Qinghu Wang, Liping Pan, Shaobai Sang","doi":"10.1016/j.jallcom.2025.185600","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.185600","url":null,"abstract":"The preparation of high-performance SiC reticulated porous ceramics (SRPC) is critical to ensuring the long-term service of SiC porous media burners. Aiming to synergistically improve the strength and oxidation resistance of the SRPC with multi-layered struts, residual stress was intentionally induced within the anti-oxidation layer by adjusting the coefficient of thermal expansion (CTE). The SRPC was prepared via SiC slurry coating and vacuum infiltration of alumina composite slurry, followed by spraying of LaAlO<ce:inf loc=\"post\">3</ce:inf> slurry, whose struts included SiC skeleton, transition layers and infrared radiation coating. Results showed that the residual compressive stress generated within anti-oxidation layer when the andalusite was introduced, resulting in an enhanced strength and water-oxygen corrosion resistance. The anti-oxidation layer with ZrO<ce:inf loc=\"post\">2</ce:inf> addition was peeling off due to the formed residual tensile stress. After 10<ce:hsp sp=\"0.25\"></ce:hsp>hours of water-oxygen corrosion, the compression strength of the SRPC coated with LaAlO<ce:inf loc=\"post\">3</ce:inf> coating did not decrease, which was related to the formation of rod-like whiskers in the coating. This study provides valuable guidance for the preparation of medium materials utilized in high-temperature porous medium combustion.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"14 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145753495","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 synergistic and enhanced bath smelting of primary ores with secondary resources is a key strategy to address the paradox of resource scarcity and recycling of secondary resources in zinc metallurgy. However, due to the high melting temperature of high zinc slags (Zn > 25%), bath smelting below 1250 °C has not yet been practically implemented. This study proposes a new approach for reducing the melting temperature of high zinc slags by tailoring slag composition and co-smelting secondary resources to promote synergistic melting. The melting properties and regulation mechanisms of high zinc slags were systematically investigated through FactSage thermodynamic calculations, in-situ observation using an ash fusion temperatures auto detecting system, and quenching experiments. The results reveal that CaO/SiO₂ and FeO/SiO₂ mass ratio are the primary factors influencing the melting temperature. Excessively high or low CaO/SiO₂ and FeO/SiO₂ promote the formation of high melting point phases such as zincite, spinel, willemite and melilite, thereby increasing the melting temperature. Components from secondary resources, such as B₂O₃, Na₂O and Cu₂O, can significantly reduce the content of high melting point phase in the melting process, and reduce the melting temperature, while MgO, Cr₂O₃, etc., have the opposite effect. The melting temperature of co-smelting high zinc slag with 15% sludge and 4% borax was reduced over 125 °C. In industrial pilot-scale trial exceeding 20 tons, the flow temperature of high zinc slag containing 27.08% zinc was 1118 °C. This study establishes technical foundations for low-energy and clean co-smelting of secondary resources with primary ores.
{"title":"Lowering melting temperatures of high zinc slag derived from co-smelting of primary ores and secondary resources: regulation method and mechanisms","authors":"Jiawei Lu, Liyuan Chai, Xiaobo Min, Yong Ke, Yun Li, Yunyan Wang, Xin Wang, Yiming Liu, Cong Peng","doi":"10.1016/j.jallcom.2025.185594","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.185594","url":null,"abstract":"The synergistic and enhanced bath smelting of primary ores with secondary resources is a key strategy to address the paradox of resource scarcity and recycling of secondary resources in zinc metallurgy. However, due to the high melting temperature of high zinc slags (Zn > 25%), bath smelting below 1250 °C has not yet been practically implemented. This study proposes a new approach for reducing the melting temperature of high zinc slags by tailoring slag composition and co-smelting secondary resources to promote synergistic melting. The melting properties and regulation mechanisms of high zinc slags were systematically investigated through FactSage thermodynamic calculations, in-situ observation using an ash fusion temperatures auto detecting system, and quenching experiments. The results reveal that CaO/SiO₂ and FeO/SiO₂ mass ratio are the primary factors influencing the melting temperature. Excessively high or low CaO/SiO₂ and FeO/SiO₂ promote the formation of high melting point phases such as zincite, spinel, willemite and melilite, thereby increasing the melting temperature. Components from secondary resources, such as B₂O₃, Na₂O and Cu₂O, can significantly reduce the content of high melting point phase in the melting process, and reduce the melting temperature, while MgO, Cr₂O₃, etc., have the opposite effect. The melting temperature of co-smelting high zinc slag with 15% sludge and 4% borax was reduced over 125 °C. In industrial pilot-scale trial exceeding 20 tons, the flow temperature of high zinc slag containing 27.08% zinc was 1118 °C. This study establishes technical foundations for low-energy and clean co-smelting of secondary resources with primary ores.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"66 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145732612","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 : 2025-12-13DOI: 10.1016/j.jallcom.2025.185578
Rohit Raina, Mohan L. Verma, Nabaparna Chakraborty, Kamni, Pankaj Biswas
A novel red emitting Eu3+ doped KSrB5O9 phosphors were successfully prepared using combustion method. The powder X-ray diffraction (pXRD) confirmed the single-phase monoclinic structure of prepared phosphors. The substitution of Eu3+ ions at Sr2+ sites create a charge imbalance, which is compensated by the creation of Sr2+ vacancies. Elemental composition and the oxidation states of the constituent elements present in the prepared phosphor was confirmed by X-ray photoelectron spectroscopy (XPS) and energy dispersive X-ray spectroscopy (EDX). Under excitation wavelength of 392nm, prepared phosphor samples exhibit a strong emission band centred at 618nm corresponding to hypersensitive transition 5D0→7F2. At 5mol % concentration of Eu3+ maximum luminescence intensity is observed. The photometric studies of the 5mol % Eu3+ doped KSrB5O9 phosphor indicates that the emission is in red region with outstanding colour purity of 99%. Tauc’s equation was used to determine the optical bandgap of prepared phosphor samples. The optical indirect and direct band gap for 5mol % Eu3+ doped KSrB5O9 phosphor was found to be 3.79eV and 4.49eV respectively. The band structure and partial density of states for undoped KSrB5O9 were investigated using density functional theory (DFT) analysis. The Judd-Ofelt intensity parameters calculated using PL emission spectra indicate covalent bonding character between Eu3+ ion and its surrounding ligands, as well as lack of symmetry around the Eu3+ ion site. Other radiative properties such as branching ratio exceeding 50% and high stimulated emission cross section were also estimated using JO parameters. All these observations indicate that the prepared phosphor is promising candidate for red emission, making it well-suited for use in photonic applications like lasers, displays and imaging.
{"title":"DFT and Judd–Ofelt Analysis of a Novel Red-Emitting Eu3+ Doped KSrB₅O₉ Phosphor for Photonic Applications","authors":"Rohit Raina, Mohan L. Verma, Nabaparna Chakraborty, Kamni, Pankaj Biswas","doi":"10.1016/j.jallcom.2025.185578","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.185578","url":null,"abstract":"A novel red emitting Eu<ce:sup loc=\"post\">3+</ce:sup> doped KSrB<ce:inf loc=\"post\">5</ce:inf>O<ce:inf loc=\"post\">9</ce:inf> phosphors were successfully prepared using combustion method. The powder X-ray diffraction (pXRD) confirmed the single-phase monoclinic structure of prepared phosphors. The substitution of Eu<ce:sup loc=\"post\">3+</ce:sup> ions at Sr<ce:sup loc=\"post\">2+</ce:sup> sites create a charge imbalance, which is compensated by the creation of Sr<ce:sup loc=\"post\">2+</ce:sup> vacancies. Elemental composition and the oxidation states of the constituent elements present in the prepared phosphor was confirmed by X-ray photoelectron spectroscopy (XPS) and energy dispersive X-ray spectroscopy (EDX). Under excitation wavelength of 392<ce:hsp sp=\"0.25\"></ce:hsp>nm, prepared phosphor samples exhibit a strong emission band centred at 618<ce:hsp sp=\"0.25\"></ce:hsp>nm corresponding to hypersensitive transition <ce:sup loc=\"post\">5</ce:sup>D<ce:inf loc=\"post\">0</ce:inf>→<ce:sup loc=\"post\">7</ce:sup>F<ce:inf loc=\"post\">2</ce:inf>. At 5<ce:hsp sp=\"0.25\"></ce:hsp>mol % concentration of Eu<ce:sup loc=\"post\">3+</ce:sup> maximum luminescence intensity is observed. The photometric studies of the 5<ce:hsp sp=\"0.25\"></ce:hsp>mol % Eu<ce:sup loc=\"post\">3+</ce:sup> doped KSrB<ce:inf loc=\"post\">5</ce:inf>O<ce:inf loc=\"post\">9</ce:inf> phosphor indicates that the emission is in red region with outstanding colour purity of 99%. Tauc’s equation was used to determine the optical bandgap of prepared phosphor samples. The optical indirect and direct band gap for 5<ce:hsp sp=\"0.25\"></ce:hsp>mol % Eu<ce:sup loc=\"post\">3+</ce:sup> doped KSrB<ce:inf loc=\"post\">5</ce:inf>O<ce:inf loc=\"post\">9</ce:inf> phosphor was found to be 3.79<ce:hsp sp=\"0.25\"></ce:hsp>eV and 4.49<ce:hsp sp=\"0.25\"></ce:hsp>eV respectively. The band structure and partial density of states for undoped KSrB<ce:inf loc=\"post\">5</ce:inf>O<ce:inf loc=\"post\">9</ce:inf> were investigated using density functional theory (DFT) analysis. The Judd-Ofelt intensity parameters calculated using PL emission spectra indicate covalent bonding character between Eu<ce:sup loc=\"post\">3+</ce:sup> ion and its surrounding ligands, as well as lack of symmetry around the Eu<ce:sup loc=\"post\">3+</ce:sup> ion site. Other radiative properties such as branching ratio exceeding 50% and high stimulated emission cross section were also estimated using JO parameters. All these observations indicate that the prepared phosphor is promising candidate for red emission, making it well-suited for use in photonic applications like lasers, displays and imaging.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"14 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145753521","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}
CdS, as one of the representative narrow-bandgap semiconductor photocatalyst for hydrogen production from water splitting, suffers from rapid recombination of photogenerated charge carriers, which limits its practical applications. To address this issue, metal alloy/CdS system with tunable surface stain was proposed. In this study, PdRux cubic nanoalloys (~10nm) were synthesized and deposited on 2D-CdS. Comprehensive characterizations, including XRD, TEM, XPS, TRPL, ESR, photoelectrochemical measurements, and density functional theory (DFT) calculations, were employed to systematically investigate the charge transfer behavior and the strain-induced electronic structure modulation. The PdRux nanoalloys exhibits a high work function, leading to interfacial Schottky barrier formation, effectively minimizing charge carrier recombination. Additionally, strain effects shift the d-band center of Pd downward by 0.019eV, optimizing the hydrogen adsorption free energy (ΔGH*) to +0.14eV, thereby reducing the hydrogen evolution reaction barrier. The optimized 2.0% PdRu0.02/CdS achieved an outstanding hydrogen evolution rate of 84.64mmol·g-1·h-1 under visible light (λ > 420nm), representing a 665% improvement over pristine CdS. This study provides both experimental and theoretical insights for designing highly efficient and stable alloy/semiconductor photocatalytic systems, offering a promising strategy for advancing solar-driven hydrogen production.
{"title":"PdRux/CdS: A Visible-Light-Driven Water Splitting Photocatalyst Based on Strain Engineering and Interface Modulation","authors":"Liuying Xiong, Yangbo Ma, Miao Fa, Yihui Zhang, Xiying Li, Shuaishuai Zhou, Wei Chen, Liqun Mao","doi":"10.1016/j.jallcom.2025.185596","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.185596","url":null,"abstract":"CdS, as one of the representative narrow-bandgap semiconductor photocatalyst for hydrogen production from water splitting, suffers from rapid recombination of photogenerated charge carriers, which limits its practical applications. To address this issue, metal alloy/CdS system with tunable surface stain was proposed. In this study, PdRu<ce:inf loc=\"post\"><ce:italic>x</ce:italic></ce:inf> cubic nanoalloys (~10<ce:hsp sp=\"0.25\"></ce:hsp>nm) were synthesized and deposited on 2D-CdS. Comprehensive characterizations, including XRD, TEM, XPS, TRPL, ESR, photoelectrochemical measurements, and density functional theory (DFT) calculations, were employed to systematically investigate the charge transfer behavior and the strain-induced electronic structure modulation. The PdRu<ce:inf loc=\"post\"><ce:italic>x</ce:italic></ce:inf> nanoalloys exhibits a high work function, leading to interfacial Schottky barrier formation, effectively minimizing charge carrier recombination. Additionally, strain effects shift the d-band center of Pd downward by 0.019<ce:hsp sp=\"0.25\"></ce:hsp>eV, optimizing the hydrogen adsorption free energy (ΔG<ce:inf loc=\"post\">H*</ce:inf>) to +0.14<ce:hsp sp=\"0.25\"></ce:hsp>eV, thereby reducing the hydrogen evolution reaction barrier. The optimized 2.0% PdRu<ce:inf loc=\"post\">0.02</ce:inf>/CdS achieved an outstanding hydrogen evolution rate of 84.64<ce:hsp sp=\"0.25\"></ce:hsp>mmol·g<ce:sup loc=\"post\">-1</ce:sup>·h<ce:sup loc=\"post\">-1</ce:sup> under visible light (λ > 420<ce:hsp sp=\"0.25\"></ce:hsp>nm), representing a 665% improvement over pristine CdS. This study provides both experimental and theoretical insights for designing highly efficient and stable alloy/semiconductor photocatalytic systems, offering a promising strategy for advancing solar-driven hydrogen production.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"154 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145753499","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}
A gradient nanostructure (GNS) was fabricated on Zr-1.5Hf-0.15 O by the ultrasonic surface rolling process (USRP). The strengthening mechanisms and microstructural evolution of the GNS were systematically investigated by combining experimental characterization and the crystal plasticity finite element method (CPFEM). A graded structural layer approximately 350 μm thick was formed on the Zr-1.5Hf-0.15 O surface, as revealed by microstructural analysis following USRP treatment. The yield strength of GNS Zr-1.5Hf-0.15 O (GNS-Zr) increased by 16.7% compared to the coarse-grained Zr-1.5Hf-0.15 O (CG-Zr), with a concurrent uniform elongation of ~26.4%. The contribution of grain refinement strengthening, dislocation strengthening and twinning-induced strengthening to the overall strength in GNS-Zr was quantified by using the mixing principle. Notably, the CPFEM results effectively captured the stress-strain behavior of both the GNS and CG structures. Compared to the CG structure, the surface layer of the GNS structure exhibits higher microscopic stress, while its core region demonstrates greater plastic strain. Furthermore, the CPFEM results indicated that multiple deformation modes were activated in the GNS-Zr, which not only coordinates the deformation but also provides higher strain hardening. Finally, the effect of the slip system on texture evolution was explored by combining the in-grain misorientation axis (IGMA) and CPFEM. The results showed that the (0001) basal texture remains stable after tension due to the activation of considerable prismatic slips.
采用超声表面轧制法（USRP）在Zr-1.5Hf-0.15 O表面制备了梯度纳米结构（GNS）。采用实验表征和晶体塑性有限元相结合的方法，系统研究了GNS的强化机理和微观组织演变。经USRP处理后，在Zr-1.5Hf-0.15 O表面形成了约350 μm厚的渐变组织层。GNS Zr-1.5Hf-0.15 O （GNS- zr）的屈服强度比粗晶Zr-1.5Hf-0.15 O （CG-Zr）提高了16.7%，同时均匀伸长率为~26.4%。采用混合原理量化了GNS-Zr中晶粒细化强化、位错强化和孪晶强化对整体强度的贡献。值得注意的是，CPFEM结果有效地捕获了GNS和CG结构的应力-应变行为。与CG结构相比，GNS结构的表层表现出更高的微观应力，而其核心区域表现出更大的塑性应变。此外，CPFEM结果表明，GNS-Zr中激活了多种变形模式，不仅协调了变形，而且提供了更高的应变硬化。最后，结合晶内取向轴（IGMA）和CPFEM，探讨滑移系统对织构演化的影响。结果表明，（0001）基底织构在拉伸后仍保持稳定，这是由于大量棱柱滑移的激活。
{"title":"Mechanical response of gradient nanostructured Zr-1.5Hf-0.15O under tensile deformation: experimental and CPFEM modeling study","authors":"Jinping Wang, Conghui Zhang, Kangkai Song, Shuaiyang Liu, Wenguang Zhu, Ruixuan Tian","doi":"10.1016/j.jallcom.2025.185581","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.185581","url":null,"abstract":"A gradient nanostructure (GNS) was fabricated on Zr-1.5Hf-0.15<!-- --> <!-- -->O by the ultrasonic surface rolling process (USRP). The strengthening mechanisms and microstructural evolution of the GNS were systematically investigated by combining experimental characterization and the crystal plasticity finite element method (CPFEM). A graded structural layer approximately 350 μm thick was formed on the Zr-1.5Hf-0.15<!-- --> <!-- -->O surface, as revealed by microstructural analysis following USRP treatment. The yield strength of GNS Zr-1.5Hf-0.15<!-- --> <!-- -->O (GNS-Zr) increased by 16.7% compared to the coarse-grained Zr-1.5Hf-0.15<!-- --> <!-- -->O (CG-Zr), with a concurrent uniform elongation of ~26.4%. The contribution of grain refinement strengthening, dislocation strengthening and twinning-induced strengthening to the overall strength in GNS-Zr was quantified by using the mixing principle. Notably, the CPFEM results effectively captured the stress-strain behavior of both the GNS and CG structures. Compared to the CG structure, the surface layer of the GNS structure exhibits higher microscopic stress, while its core region demonstrates greater plastic strain. Furthermore, the CPFEM results indicated that multiple deformation modes were activated in the GNS-Zr, which not only coordinates the deformation but also provides higher strain hardening. Finally, the effect of the slip system on texture evolution was explored by combining the in-grain misorientation axis (IGMA) and CPFEM. The results showed that the (0001) basal texture remains stable after tension due to the activation of considerable prismatic slips.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"14 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145732239","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 : 2025-12-13DOI: 10.1016/j.jallcom.2025.185548
Lichong Ye, Jin Zhang, Chen Shi, Chunnan Zhu, Dongfeng Shi, Guoqing Wang
{"title":"Deformation Mechanism, Crack Behavior and Microstructural Evolution of 2195 Al-Li alloy at High-Temperature","authors":"Lichong Ye, Jin Zhang, Chen Shi, Chunnan Zhu, Dongfeng Shi, Guoqing Wang","doi":"10.1016/j.jallcom.2025.185548","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.185548","url":null,"abstract":"","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"59 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145730790","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 : 2025-12-13DOI: 10.1016/j.jallcom.2025.185588
Jie Shao, Zhixing Ye, Huan Chen, Qiuping Chen, Kongyang Yu, Jun Shen, Zhaojun Mo
{"title":"Improved Compositional Homogeneity by Zone Melting Combined with Controlled Annealing: A Route to Enhanced Magnetocaloric Performance in All-d-Metal Ni-Co-Mn-Ti Heusler Alloys","authors":"Jie Shao, Zhixing Ye, Huan Chen, Qiuping Chen, Kongyang Yu, Jun Shen, Zhaojun Mo","doi":"10.1016/j.jallcom.2025.185588","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.185588","url":null,"abstract":"","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"151 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145730796","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}
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