Pub Date : 2025-04-23DOI: 10.1016/j.jallcom.2025.180547
Bingyu Yang, Hui Liu, Jiaojiao Gao, Jingjing Xu, Lingyan Pang
Non-enzyme biosensors have been widely studied due to their advantages of high stability and long service life. However, the poor selectivity and relatively high cost seriously limits the practical application. To address these challenges, the study aims to develop a high-performance, cost-effective non-enzyme glucose biosensor with enhanced selectivity and stability. Herein, a self-supporting electrochemical biosensor based on in situ growth of three-dimensional NiO nanosheet arrays on carbon cloth (CC) was fabricated through hydrothermal and calcination methods. The unique structure of the porous NiO nanosheet arrays, via the formation of C-O-Ni bonds, combined with the carbon cloth substrate, expose more reactive sites, and facilitating rapid electron transport during glucose redox reactions. The biosensor shows a broad detection range of 5-375 and 375-1400 μM, a low detection limit of 1.62 μM, a high sensitivity of 0.122 mA·μM-1·cm-2 and 0.012 mA·μM-1·cm-2. Significantly, the as-prepared biosensor shows strong catalytic activity towards glucose (C6H12O6), with an apparent Michaelis-Menten constant () of 19.61 μmol/L. Additionally, the sensor exhibits excellent selectivity, cycling stability, and reproducibility, enabling accurate quantitative detection of glucose in body fluids. Particularly, the flexible properties offer promising prospects for the development of wearable, non-invasive glucose monitoring devices.
{"title":"8 Fabrication of three dimensional NiO nanosheet arrays on carbon cloth as self-supporting non-enzyme glucose electrochemical biosensor","authors":"Bingyu Yang, Hui Liu, Jiaojiao Gao, Jingjing Xu, Lingyan Pang","doi":"10.1016/j.jallcom.2025.180547","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180547","url":null,"abstract":"Non<strong>-</strong>enzyme biosensors have been widely studied due to their advantages of high stability and long service life. However, the poor selectivity and relatively high cost seriously limits the practical application. To address these challenges, the study aims to develop a high-performance, cost-effective non-enzyme glucose biosensor with enhanced selectivity and stability. Herein, a self-supporting electrochemical biosensor based on in situ growth of three-dimensional NiO nanosheet arrays on carbon cloth (CC) was fabricated through hydrothermal and calcination methods. The unique structure of the porous NiO nanosheet arrays, via the formation of C-O-Ni bonds, combined with the carbon cloth substrate, expose more reactive sites, and facilitating rapid electron transport during glucose redox reactions. The biosensor shows a broad detection range of 5-375 and 375-1400<!-- --> <!-- -->μM, a low detection limit of 1.62<!-- --> <!-- -->μM, a high sensitivity of 0.122<!-- --> <!-- -->mA·μM<sup>-1</sup>·cm<sup>-2</sup> and 0.012<!-- --> <!-- -->mA·μM<sup>-1</sup>·cm<sup>-2</sup>. Significantly, the as-prepared biosensor shows strong catalytic activity towards glucose (C<sub>6</sub>H<sub>12</sub>O<sub>6</sub>), with an apparent Michaelis-Menten constant (<span><math><msubsup is=\"true\"><mrow is=\"true\"><mi is=\"true\">K</mi><mspace is=\"true\" width=\"1em\"></mspace></mrow><mrow is=\"true\"><mi is=\"true\">M</mi></mrow><mrow is=\"true\"><mi is=\"true\" mathvariant=\"italic\">app</mi></mrow></msubsup></math></span>) of 19.61 μmol/L. Additionally, the sensor exhibits excellent selectivity, cycling stability, and reproducibility, enabling accurate quantitative detection of glucose in body fluids. Particularly, the flexible properties offer promising prospects for the development of wearable, non-invasive glucose monitoring devices.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"69 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143862669","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 : 2025-04-23DOI: 10.1016/j.jallcom.2025.180567
Jianghai Wu, Yuchen wang, Xin Liu, Yang Hua, Pengwei Li, Qing wang, Yahui Zhang, Shengxue Yan, Jing Guo, Shao-hua Luo
Iron sulfides have shown great promise as anode materials for sodium-ion batteries (SIBs) due to their high storage capacity and low cost. However, their practical implementation is hindered by significant volume expansion and poor electronic conductivity. In this investigation, ultrafine Fe1-xS nanoparticles with dual protection from iron-modified graphitic carbon nitride (g-C3N4) and sulfur/nitrogen-doped one-dimensional carbon fiber were successfully fabricated through a designed strategy. The introduction of carbon fiber significantly accelerates the transport of electrons and ions as well as the reaction dynamics. Additionally, the in-situ hybridization of iron-modified g-C3N4 encapsulated in carbon fibers during pyrolysis leads to a heterogeneous structure between g-C3N4 and Fe1-xS species. This not only restricts the growth of Fe1-xS particles, but also greatly accelerate electron and ion transport as well as reaction kinetics. The resultant g-C3N4/Fe1-xS@NSCFs-0.15 composite demonstrated a stable discharge capacity of 577 mAh g−1 after 100 cycles at 0.1 A g−1, with a retained capacity of 451 mAh g−1 after 100 cycles at 1 A g−1. Our results indicate that the dual-protection structural characteristics of the iron-modified graphitic carbon nitride and S/N-doped one-dimensional carbon fiber can enhance the electrode performance of Fe1-xS, Meanwhile, the amount of urea added is crucial for regulating the fine structure.
{"title":"Fe1-xS/Fe g-C3N4 heterostructure encapsulated into S/N-doped carbon nanofibers as an efficient anode material for sodium ion batteries","authors":"Jianghai Wu, Yuchen wang, Xin Liu, Yang Hua, Pengwei Li, Qing wang, Yahui Zhang, Shengxue Yan, Jing Guo, Shao-hua Luo","doi":"10.1016/j.jallcom.2025.180567","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180567","url":null,"abstract":"Iron sulfides have shown great promise as anode materials for sodium-ion batteries (SIBs) due to their high storage capacity and low cost. However, their practical implementation is hindered by significant volume expansion and poor electronic conductivity. In this investigation, ultrafine Fe<sub>1-x</sub>S nanoparticles with dual protection from iron-modified graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) and sulfur/nitrogen-doped one-dimensional carbon fiber were successfully fabricated through a designed strategy. The introduction of carbon fiber significantly accelerates the transport of electrons and ions as well as the reaction dynamics. Additionally, the in-situ hybridization of iron-modified g-C<sub>3</sub>N<sub>4</sub> encapsulated in carbon fibers during pyrolysis leads to a heterogeneous structure between g-C<sub>3</sub>N<sub>4</sub> and Fe<sub>1-x</sub>S species. This not only restricts the growth of Fe<sub>1-x</sub>S particles, but also greatly accelerate electron and ion transport as well as reaction kinetics. The resultant g-C<sub>3</sub>N<sub>4</sub>/Fe<sub>1-x</sub>S@NSCFs-0.15 composite demonstrated a stable discharge capacity of 577 mAh g<sup>−1</sup> after 100 cycles at 0.1 A g<sup>−1</sup>, with a retained capacity of 451 mAh g<sup>−1</sup> after 100 cycles at 1 A g<sup>−1</sup>. Our results indicate that the dual-protection structural characteristics of the iron-modified graphitic carbon nitride and S/N-doped one-dimensional carbon fiber can enhance the electrode performance of Fe<sub>1-x</sub>S, Meanwhile, the amount of urea added is crucial for regulating the fine structure.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"69 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143862667","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 : 2025-04-23DOI: 10.1016/j.jallcom.2025.180593
Xuejiao Zhang, Chuyue Xing, Jin Long, Aojie Zhang, Yu Song, Songtong Zhang, Yun Liang, Jian Hu
The commonly used polyolefin separators face challenges such as poor electrolyte wettability, severe thermal shrinkage, and significant lithium dendrite growth, which significantly limit the further development and energy density enhancement of lithium-ion batteries. Therefore, the design and fabrication of advanced separator materials with excellent wettability, high mechanical strength, and inhibition of dendrite growth are essential for the next generation of lithium-ion batteries. In this study, a novel separator is developed using Li6.4La3Zr1.4Ta0.6O12 (LLZTO), polyethylene terephthalate (PET), and Lyocell, fabricated through a wet papermaking process combined with coating technology. The LPC separator exhibits high mechanical strength (56.98 MPa), small pore size (226 nm), and thin thickness (19.63 μm). The Lyocell layer demonstrates strong affinity for the electrolyte, the PET layer enhances the separator's tensile strength, and the LLZTO layer effectively prevents internal short circuits and deterioration in battery performance. The LPC15 separator battery achieves an initial specific capacity of 184.2 mAh g-1, with a capacity retention of 96.3% after 100 cycles at 30°C and 1 C. Under -10°C and 0.2 C conditions, the initial specific capacity reaches 129.3 mAh g-1, with an impressive capacity retention of 99.6% after 100 cycles, thanks to the LLZTO layer.
{"title":"The Li6.4La3Zr1.4Ta0.6O12-coated polyethylene terephthalate / Lyocell composite separator for lithium-ion batteries","authors":"Xuejiao Zhang, Chuyue Xing, Jin Long, Aojie Zhang, Yu Song, Songtong Zhang, Yun Liang, Jian Hu","doi":"10.1016/j.jallcom.2025.180593","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180593","url":null,"abstract":"The commonly used polyolefin separators face challenges such as poor electrolyte wettability, severe thermal shrinkage, and significant lithium dendrite growth, which significantly limit the further development and energy density enhancement of lithium-ion batteries. Therefore, the design and fabrication of advanced separator materials with excellent wettability, high mechanical strength, and inhibition of dendrite growth are essential for the next generation of lithium-ion batteries. In this study, a novel separator is developed using Li6.4La3Zr1.4Ta0.6O12 (LLZTO), polyethylene terephthalate (PET), and Lyocell, fabricated through a wet papermaking process combined with coating technology. The LPC separator exhibits high mechanical strength (56.98<!-- --> <!-- -->MPa), small pore size (226<!-- --> <!-- -->nm), and thin thickness (19.63 μm). The Lyocell layer demonstrates strong affinity for the electrolyte, the PET layer enhances the separator's tensile strength, and the LLZTO layer effectively prevents internal short circuits and deterioration in battery performance. The LPC15 separator battery achieves an initial specific capacity of 184.2 mAh g-1, with a capacity retention of 96.3% after 100 cycles at 30°C and 1<!-- --> <!-- -->C. Under -10°C and 0.2<!-- --> <!-- -->C conditions, the initial specific capacity reaches 129.3 mAh g-1, with an impressive capacity retention of 99.6% after 100 cycles, thanks to the LLZTO layer.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"128 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143862770","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 : 2025-04-23DOI: 10.1016/j.jallcom.2025.180591
Xiaolong Lu, Cunli Mu, Yan Lu, Junming Liu, Junying Hao, Weimin Liu
Motivated by the growing need for advanced coatings capable of withstanding extreme thermal and mechanical conditions in industries such as aerospace, automotive, and energy, this study explores the tribological behavior of high-entropy ceramics coatings at elevated temperatures. The novelty of this work lies in the comparative investigation of (CrAlVTiNb)Nx high-entropy nitrides (HENs) and (CrAlVTiNb)CNx high-entropy carbonitrides (HECNs), fabricated using high power impulse magnetron sputtering, to elucidate the interplay between material composition, structure, and performance across a wide temperature range. The HENs exhibit an FCC nitride phase structure, while the HECNs display an amorphous structure. HENs achieve a maximum nano-hardness of 34 GPa after 1-hour treatment at 400°C, decreasing to 19 GPa after 600°C treatment, whereas HECNs show a maximum of 15.6 GPa at room temperature, dropping to 1.8 GPa after 600°C treatment. HECNs demonstrate lower friction coefficients than HENs, attributed to the lubricating effect of the amorphous carbon phase and the formation of dense tribo-layers. Despite lower hardness, HECNs exhibit higher adhesion strength after 600°C treatment, enhancing tribological interaction, while the higher hardness of HENs leads to increased brittleness, limiting tribo-layers formation. This work highlights the significance of material composition and structure in optimizing coating performance under thermal stress, providing critical insights for the design of next-generation high-entropy ceramics for advanced mechanical and tribological applications.
{"title":"Comparative analysis of structural, mechanical and tribological properties of high-entropy nitrides and carbonitrides coatings over a wide temperature range","authors":"Xiaolong Lu, Cunli Mu, Yan Lu, Junming Liu, Junying Hao, Weimin Liu","doi":"10.1016/j.jallcom.2025.180591","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180591","url":null,"abstract":"Motivated by the growing need for advanced coatings capable of withstanding extreme thermal and mechanical conditions in industries such as aerospace, automotive, and energy, this study explores the tribological behavior of high-entropy ceramics coatings at elevated temperatures. The novelty of this work lies in the comparative investigation of (CrAlVTiNb)N<sub>x</sub> high-entropy nitrides (HENs) and (CrAlVTiNb)CN<sub>x</sub> high-entropy carbonitrides (HECNs), fabricated using high power impulse magnetron sputtering, to elucidate the interplay between material composition, structure, and performance across a wide temperature range. The HENs exhibit an FCC nitride phase structure, while the HECNs display an amorphous structure. HENs achieve a maximum nano-hardness of 34<!-- --> <!-- -->GPa after 1-hour treatment at 400°C, decreasing to 19<!-- --> <!-- -->GPa after 600°C treatment, whereas HECNs show a maximum of 15.6<!-- --> <!-- -->GPa at room temperature, dropping to 1.8<!-- --> <!-- -->GPa after 600°C treatment. HECNs demonstrate lower friction coefficients than HENs, attributed to the lubricating effect of the amorphous carbon phase and the formation of dense tribo-layers. Despite lower hardness, HECNs exhibit higher adhesion strength after 600°C treatment, enhancing tribological interaction, while the higher hardness of HENs leads to increased brittleness, limiting tribo-layers formation. This work highlights the significance of material composition and structure in optimizing coating performance under thermal stress, providing critical insights for the design of next-generation high-entropy ceramics for advanced mechanical and tribological applications.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"24 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143862769","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 : 2025-04-23DOI: 10.1016/j.jallcom.2025.180558
Shaohe Zheng, Mingwei Wei, Shanlin Wang, Timing Zhang, Jilin Xie, Kang Wei, Min Zheng, Yuhua Chen
Ni-15Fe-Mo permalloy with a density of 99.75% was fabricated using selective laser melting (SLM) technology. The effects of process parameters and recrystallization annealing heat treatment on the microstructure, mechanical properties, and soft magnetic properties of the permalloy specimens were examined, and the correlation between microstructure evolution and properties was clarified. Microstructural changes induced by recrystallization annealing led to increased saturation magnetic induction and reduced coercivity. The enhancement of soft magnetic characteristics can be ascribed to reduced internal stresses, cellular substructural wall impediments, magnetic domain restrictions, and compositional heterogeneity. The annealing process led to a minor reduction in microhardness and tensile strength and a substantial increase in elongation. This study provides an essential technical reference for fabricating permalloy soft magnetic materials with excellent comprehensive performance using SLM technology.
{"title":"Effect of heat treatment on microstructure evolution and magnetic properties of Ni-15Fe-Mo permalloy prepared by selective laser melting","authors":"Shaohe Zheng, Mingwei Wei, Shanlin Wang, Timing Zhang, Jilin Xie, Kang Wei, Min Zheng, Yuhua Chen","doi":"10.1016/j.jallcom.2025.180558","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180558","url":null,"abstract":"Ni-15Fe-Mo permalloy with a density of 99.75% was fabricated using selective laser melting (SLM) technology. The effects of process parameters and recrystallization annealing heat treatment on the microstructure, mechanical properties, and soft magnetic properties of the permalloy specimens were examined, and the correlation between microstructure evolution and properties was clarified. Microstructural changes induced by recrystallization annealing led to increased saturation magnetic induction and reduced coercivity. The enhancement of soft magnetic characteristics can be ascribed to reduced internal stresses, cellular substructural wall impediments, magnetic domain restrictions, and compositional heterogeneity. The annealing process led to a minor reduction in microhardness and tensile strength and a substantial increase in elongation. This study provides an essential technical reference for fabricating permalloy soft magnetic materials with excellent comprehensive performance using SLM technology.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"26 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143862772","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 : 2025-04-22DOI: 10.1016/j.jallcom.2025.180571
Zhengyu Li, Yingjie Liu, Zepeng Gao, Zihao Yin, Zihan Wang, Zhenbo Qin, Yang Zhu, Zhong Wu, Wenbin Hu
In this study, the effect of plastic deformation on the discharge performance of an aluminum–air battery (AAB) was investigated. High-purity Al anodes were processed by cold rolling (CR) under different degrees of plastic deformation and analyzed using discharge tests. The discharge voltage and specific capacity initially increased and then decreased with extended cold rolling, achieving the highest values of 1.15 V and 2682.38 mAh/gAl at 50 mA/cm2 with 60% deformation. Deformation via CR significantly affected the microstructure of the Al anode, where the preferred orientation of the crystal plane gradually changed from Al(111) to Al(200) when deformed up to 60%, and remarkable grain refinement was only observed at 80% deformation, inducing dynamic recrystallization with a change in the orientation toward Al(111). Although grain refinement can improve the discharge performance to a certain extent, preferred orientation along the Al(200) crystal plane played a dominant role in inhibiting the HER and improving the discharge performance of the AAB. Density functional theory calculation showed that Al(200) had a lower adsorption capacity for H2O compared to Al(111), thereby improving the discharge performance of the AAB.
{"title":"Effect of plastic deformation on discharge performance of Aluminum–air battery","authors":"Zhengyu Li, Yingjie Liu, Zepeng Gao, Zihao Yin, Zihan Wang, Zhenbo Qin, Yang Zhu, Zhong Wu, Wenbin Hu","doi":"10.1016/j.jallcom.2025.180571","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180571","url":null,"abstract":"In this study, the effect of plastic deformation on the discharge performance of an aluminum–air battery (AAB) was investigated. High-purity Al anodes were processed by cold rolling (CR) under different degrees of plastic deformation and analyzed using discharge tests. The discharge voltage and specific capacity initially increased and then decreased with extended cold rolling, achieving the highest values of 1.15<!-- --> <!-- -->V and 2682.38 mAh/g<sub>Al</sub> at 50<!-- --> <!-- -->mA/cm<sup>2</sup> with 60% deformation. Deformation via CR significantly affected the microstructure of the Al anode, where the preferred orientation of the crystal plane gradually changed from Al(111) to Al(200) when deformed up to 60%, and remarkable grain refinement was only observed at 80% deformation, inducing dynamic recrystallization with a change in the orientation toward Al(111). Although grain refinement can improve the discharge performance to a certain extent, preferred orientation along the Al(200) crystal plane played a dominant role in inhibiting the HER and improving the discharge performance of the AAB. Density functional theory calculation showed that Al(200) had a lower adsorption capacity for H<sub>2</sub>O compared to Al(111), thereby improving the discharge performance of the AAB.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"3 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143862675","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 : 2025-04-22DOI: 10.1016/j.jallcom.2025.180565
Cuihong Wang, Ang Zhang, Zhihua Dong, Lei Wang, Zhiying Zheng, Yuyang Gao, Huabao Yang, Dingfei Zhang, Bin Jiang
The influence of Y content on coefficient of thermal expansion (CTE) and mechanical properties for Mg-10Gd-xY (x = 0.5, 2.5, 4.5, and 6.5 wt.%) alloys are elaborated through first-principle calculations and experimental characterizations. Alloying Y is demonstrated to obviously decline the CTE and enhance the strength. The theoretical predictions of thermal expansion of Mg-Gd-Y solid solutions demonstrate that, the significant reduced contribution of lattice vibration resulted from the reduced Grüneisen parameter upon alloying with Y primarily contributes to the decline of CTE. The obviously improved strength is associated strongly with the solid solution strengthening and grain refinement caused by the segregation of alloying elements at grain boundary, the pinning effect and particle-stimulation nucleation of Mg5(Gd, Y) particles. In addition, the relatively good ductility with the elongation being above 10 % can be achieved at relatively low Y content below 2.5 wt.% owing to the enhanced activation of pyramidal <c+a> slips. Nevertheless, the ductility deteriorates with further increasing Y content due to the increased fraction and size of Mg5(Gd, Y) phase.
{"title":"Influence of Y content on thermal expansion and mechanical properties of Mg-Gd-Y alloys","authors":"Cuihong Wang, Ang Zhang, Zhihua Dong, Lei Wang, Zhiying Zheng, Yuyang Gao, Huabao Yang, Dingfei Zhang, Bin Jiang","doi":"10.1016/j.jallcom.2025.180565","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180565","url":null,"abstract":"The influence of Y content on coefficient of thermal expansion (CTE) and mechanical properties for Mg-10Gd-<em>x</em>Y (<em>x</em> = 0.5, 2.5, 4.5, and 6.5 wt.%) alloys are elaborated through first-principle calculations and experimental characterizations. Alloying Y is demonstrated to obviously decline the CTE and enhance the strength. The theoretical predictions of thermal expansion of Mg-Gd-Y solid solutions demonstrate that, the significant reduced contribution of lattice vibration resulted from the reduced Grüneisen parameter upon alloying with Y primarily contributes to the decline of CTE. The obviously improved strength is associated strongly with the solid solution strengthening and grain refinement caused by the segregation of alloying elements at grain boundary, the pinning effect and particle-stimulation nucleation of Mg<sub>5</sub>(Gd, Y) particles. In addition, the relatively good ductility with the elongation being above 10 % can be achieved at relatively low Y content below 2.5 wt.% owing to the enhanced activation of pyramidal <c+a> slips. Nevertheless, the ductility deteriorates with further increasing Y content due to the increased fraction and size of Mg<sub>5</sub>(Gd, Y) phase.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"6 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143862817","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 : 2025-04-22DOI: 10.1016/j.jallcom.2025.180583
Jiwon Seo, Seungho Song, Minhwan Park, Jangwon Byun, Beomjun Park, Chansun Park, Mee Jang, Jung-Yeol Yeom
In this study, the properties of Cs3Cu2I5 (CCI) crystals grown using the Slow Vacuum Evaporation Technique (SVET) were examined. Crystals were grown at room temperature (300 K, 27°C) under vacuum conditions, producing single crystals with maximum diameter of 13 mm over 23 days. We confirmed excellent crystallinity via X-ray diffraction (XRD), compositional uniformity via X-ray photoelectron spectroscopy (XPS), and homogeneity via electron probe micro analyzer (EPMA). UV-Vis measurements indicated a high transmittance of 83% and a bandgap of 3.64 eV. The Stokes shift of 110 nm, smaller than previously reported values, contributed to faster decay times and improved low-energy detection feasibility. Time-resolved photoluminescence (TR-PL) showed a rapid decay component (4.1 ns), accounting for 95.11% of the total decay, demonstrating superior properties compared to existing reports. The gamma-ray detection capabilities of the CCI crystals were evaluated using six radioactive sources (Am-241, Ba-133, Co-57, Na-22, Cs-137, and Mn-54), achieving excellent energy resolution, including 5.2% at 662 keV. The crystals displayed a highly linear response to gamma radiation (R² = 0.99998) with a light yield of 55,613 photons/MeV. Moreover, assessments of multiple crystals grown under identical conditions showed consistent performance with a coefficient of variation (CV) of 1.23%. These findings confirm that SVET is a highly effective and cost-efficient method for producing high-quality CCI crystals, offering significant advantages over other growth techniques.
{"title":"High Performance Gamma-ray Spectrometer Based on Cs3Cu2I5 single crystal grown by Room-Temperature Vacuum Solvent-evaporation Method","authors":"Jiwon Seo, Seungho Song, Minhwan Park, Jangwon Byun, Beomjun Park, Chansun Park, Mee Jang, Jung-Yeol Yeom","doi":"10.1016/j.jallcom.2025.180583","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180583","url":null,"abstract":"In this study, the properties of Cs<sub>3</sub>Cu<sub>2</sub>I<sub>5</sub> (CCI) crystals grown using the Slow Vacuum Evaporation Technique (SVET) were examined. Crystals were grown at room temperature (300<!-- --> <!-- -->K, 27°C) under vacuum conditions, producing single crystals with maximum diameter of 13<!-- --> <!-- -->mm over 23 days. We confirmed excellent crystallinity via X-ray diffraction (XRD), compositional uniformity via X-ray photoelectron spectroscopy (XPS), and homogeneity via electron probe micro analyzer (EPMA). UV-Vis measurements indicated a high transmittance of 83% and a bandgap of 3.64<!-- --> <!-- -->eV. The Stokes shift of 110<!-- --> <!-- -->nm, smaller than previously reported values, contributed to faster decay times and improved low-energy detection feasibility. Time-resolved photoluminescence (TR-PL) showed a rapid decay component (4.1<!-- --> <!-- -->ns), accounting for 95.11% of the total decay, demonstrating superior properties compared to existing reports. The gamma-ray detection capabilities of the CCI crystals were evaluated using six radioactive sources (Am-241, Ba-133, Co-57, Na-22, Cs-137, and Mn-54), achieving excellent energy resolution, including 5.2% at 662<!-- --> <!-- -->keV. The crystals displayed a highly linear response to gamma radiation (R² = 0.99998) with a light yield of 55,613 photons/MeV. Moreover, assessments of multiple crystals grown under identical conditions showed consistent performance with a coefficient of variation (CV) of 1.23%. These findings confirm that SVET is a highly effective and cost-efficient method for producing high-quality CCI crystals, offering significant advantages over other growth techniques.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"108 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143862717","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 : 2025-04-22DOI: 10.1016/j.jallcom.2025.180568
Biao Zhang, Boyuan Cheng, Shihang Cao, Zhen Liu, Hao Wang, Quan Ju
The present work investigates the effect of solution treatment at 1140-1250 ℃ on the microstructure evolution and tensile properties of GH3230 superalloy. The results show that grain growth kinetics were synergistically controlled by the carbide pinning effect and solute drag effect. With the increase in temperature/time, the grains showed a parabolic coarsening trend, and the volume fraction of M6C carbides decreased significantly leading to the weakening of the pinning effect. The quantitative analysis of the Gibbs interfacial excess values after 1200 ℃ solution treatment showed that the significant segregation of W (+15.34 atom/nm²) and Mo (+3.74 atom/nm²) elements at grain boundaries produces a strong solute drag effect. Accordingly, a kinetic model for the coupling of carbide pinning and W, Mo solute drag was developed, and the predicted grain sizes are in good agreement with the experimental values. The tensile properties results show that with the temperature increase from 1140 ℃ to 1250 ℃, the yield strength decreases from 370 MPa to 348 MPa, while the elongation remains stable (about 44%). Quantitative analysis of the strengthening mechanism confirms that the increase in solution temperature enhances the solid solution strengthening, but weakens the grain boundary strengthening and carbide particle strengthening.
{"title":"Effect of solution treatment on microstructure and tensile properties of GH3230 superalloy","authors":"Biao Zhang, Boyuan Cheng, Shihang Cao, Zhen Liu, Hao Wang, Quan Ju","doi":"10.1016/j.jallcom.2025.180568","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180568","url":null,"abstract":"The present work investigates the effect of solution treatment at 1140-1250 ℃ on the microstructure evolution and tensile properties of GH3230 superalloy. The results show that grain growth kinetics were synergistically controlled by the carbide pinning effect and solute drag effect. With the increase in temperature/time, the grains showed a parabolic coarsening trend, and the volume fraction of M<sub>6</sub>C carbides decreased significantly leading to the weakening of the pinning effect. The quantitative analysis of the Gibbs interfacial excess values after 1200 ℃ solution treatment showed that the significant segregation of W (+15.34 atom/nm²) and Mo (+3.74 atom/nm²) elements at grain boundaries produces a strong solute drag effect. Accordingly, a kinetic model for the coupling of carbide pinning and W, Mo solute drag was developed, and the predicted grain sizes are in good agreement with the experimental values. The tensile properties results show that with the temperature increase from 1140 ℃ to 1250 ℃, the yield strength decreases from 370<!-- --> <!-- -->MPa to 348<!-- --> <!-- -->MPa, while the elongation remains stable (about 44%). Quantitative analysis of the strengthening mechanism confirms that the increase in solution temperature enhances the solid solution strengthening, but weakens the grain boundary strengthening and carbide particle strengthening.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"6 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143857954","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}
Halide perovskite nanocrystals (NCs) including CsPbBr3 as the most typical composition, have attracted widespread attention due to their excellent photovoltaic properties. However, CsPbBr3 NCs encounter the serious problem of instability and luminescent quenching when removing protection from their colloidal solution. Herein, a facile room-temperature saturation recrystallization process is employed to form CsPbBr3 NCs with an average particle size of ∼1.8 nm on the surface of Cs4PbBr6 support through adjusting Cs/Pb molar ratios (1−10). Interestingly, CsPbBr3/Cs4PbBr6 powders with Cs/Pb ratio = 7 exhibit an ultra-high quantum yield of ∼98 %. Accordingly, the photoluminescence intensity of CsPbBr3/Cs4PbBr6 powders with Cs/Pb ratio = 7 is greatly enhanced by about 2900-fold higher than the sample with a Cs/Pb ratio of 1 due to the formation of CsPbBr3/Cs4PbBr6 heterojunction structure. Subsequently, CsPbBr3/Cs4PbBr6 powders are encapsulated in a SBA-15 mesoporous silica and calcined at 700ºC to improve water-resistance properties, which can keep stable in water for more than 100 days. These CsPbBr3/Cs4PbBr6-SBA-15 composites show potential applications in white light-emitting diodes, display light sources, and flexible luminescent films in the field of wearable devices. This work provides a facile way to achieve ultra-high quantum yield through the formation of CsPbBr3/Cs4PbBr6 heterojunctions.
{"title":"Room-temperature saturation recrystallization of CsPbBr3/Cs4PbBr6 heterojunction structure with quantum yield of ∼98 % for backlight displays and wearable devices","authors":"Cong He, Chunwen Ye, Meng Wu, Shiwei Yang, Peiyuan Zhuang, Jiawei Song, Yanjie Zhang","doi":"10.1016/j.jallcom.2025.180576","DOIUrl":"10.1016/j.jallcom.2025.180576","url":null,"abstract":"<div><div>Halide perovskite nanocrystals (NCs) including CsPbBr<sub>3</sub> as the most typical composition, have attracted widespread attention due to their excellent photovoltaic properties. However, CsPbBr<sub>3</sub> NCs encounter the serious problem of instability and luminescent quenching when removing protection from their colloidal solution. Herein, a facile room-temperature saturation recrystallization process is employed to form CsPbBr<sub>3</sub> NCs with an average particle size of ∼1.8 nm on the surface of Cs<sub>4</sub>PbBr<sub>6</sub> support through adjusting Cs/Pb molar ratios (1−10). Interestingly, CsPbBr<sub>3</sub>/Cs<sub>4</sub>PbBr<sub>6</sub> powders with Cs/Pb ratio = 7 exhibit an ultra-high quantum yield of ∼98 %. Accordingly, the photoluminescence intensity of CsPbBr<sub>3</sub>/Cs<sub>4</sub>PbBr<sub>6</sub> powders with Cs/Pb ratio = 7 is greatly enhanced by about 2900-fold higher than the sample with a Cs/Pb ratio of 1 due to the formation of CsPbBr<sub>3</sub>/Cs<sub>4</sub>PbBr<sub>6</sub> heterojunction structure. Subsequently, CsPbBr<sub>3</sub>/Cs<sub>4</sub>PbBr<sub>6</sub> powders are encapsulated in a SBA-15 mesoporous silica and calcined at 700ºC to improve water-resistance properties, which can keep stable in water for more than 100 days. These CsPbBr<sub>3</sub>/Cs<sub>4</sub>PbBr<sub>6</sub>-SBA-15 composites show potential applications in white light-emitting diodes, display light sources, and flexible luminescent films in the field of wearable devices. This work provides a facile way to achieve ultra-high quantum yield through the formation of CsPbBr<sub>3</sub>/Cs<sub>4</sub>PbBr<sub>6</sub> heterojunctions.</div></div>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1027 ","pages":"Article 180576"},"PeriodicalIF":5.8,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143857955","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：