Pub Date : 2025-11-28DOI: 10.1016/j.matlet.2025.139893
Xi Wang , Yang Chen , Hanpeng Gao , Ping Liang
In this study, the enhancement mechanism of tribological properties of FeCoCrNiAl0.5-X ZrB2 (X = 10, 30 wt%) coatings was investigated using experiments and molecular dynamics simulations. Experimental results indicated that 30 wt% ZrB2 coatings exhibit superior tribological performance. As the ZrB2 content increases, a transformation from columnar to equiaxed crystals occurs, resulting in a significant reduction in adhesive wear. Molecular dynamics nano-wear simulations indicated that higher ZrB₂ content mitigates stress concentration around the friction pair and inhibits the formation of dislocation nodes. Furthermore, the increased ZrB2 content hinders slip plane activation, restricts layer slip and prevents the formation of dislocation lock.
{"title":"Enhancement mechanism of tribological properties of FeCoCrNiAl0.5-X ZrB2 coatings","authors":"Xi Wang , Yang Chen , Hanpeng Gao , Ping Liang","doi":"10.1016/j.matlet.2025.139893","DOIUrl":"10.1016/j.matlet.2025.139893","url":null,"abstract":"<div><div>In this study, the enhancement mechanism of tribological properties of FeCoCrNiAl<sub>0.5</sub>-X ZrB<sub>2</sub> (X = 10, 30 wt%) coatings was investigated using experiments and molecular dynamics simulations. Experimental results indicated that 30 wt% ZrB<sub>2</sub> coatings exhibit superior tribological performance. As the ZrB<sub>2</sub> content increases, a transformation from columnar to equiaxed crystals occurs, resulting in a significant reduction in adhesive wear. Molecular dynamics nano-wear simulations indicated that higher ZrB₂ content mitigates stress concentration around the friction pair and inhibits the formation of dislocation nodes. Furthermore, the increased ZrB<sub>2</sub> content hinders slip plane activation, restricts layer slip and prevents the formation of dislocation lock.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"406 ","pages":"Article 139893"},"PeriodicalIF":2.7,"publicationDate":"2025-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145682197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2025-11-28DOI: 10.1016/j.matlet.2025.139890
Bhavani Naga Prasanna H , S. Ratna Kumari , Dakshinamoorthy Prasanna
Traditional perovskite solar cells experience limitations in performance and stability because of the selection of transport layers. In this study, the authors evaluate the photovoltaic performance of organic (C60/PTAA) versus inorganic (WS2/Cu2O) transport layers on the performance of Rb2SnI6-based lead-free perovskite solar cells, simulated using SCAPS-1D. The organic transport layer device exhibited large band offsets, causing higher interfacial recombination, whereas the inorganic transport layer device showed a minor conduction band offset, resulting in lower recombination. With increasing absorber thickness, the PCE for inorganic (∼30 %) is slightly higher than that for organic (∼29 %). The optimized parameters highlight the advantage of inorganic transport layers for high-performance lead-free Rb2SnI6 perovskite solar cells.
{"title":"Organic and inorganic transport layer engineering for Rb2SnI6 perovskite solar cell: A comparative simulation study","authors":"Bhavani Naga Prasanna H , S. Ratna Kumari , Dakshinamoorthy Prasanna","doi":"10.1016/j.matlet.2025.139890","DOIUrl":"10.1016/j.matlet.2025.139890","url":null,"abstract":"<div><div>Traditional perovskite solar cells experience limitations in performance and stability because of the selection of transport layers. In this study, the authors evaluate the photovoltaic performance of organic (C60/PTAA) versus inorganic (WS<sub>2</sub>/Cu<sub>2</sub>O) transport layers on the performance of Rb<sub>2</sub>SnI<sub>6</sub>-based lead-free perovskite solar cells, simulated using SCAPS-1D. The organic transport layer device exhibited large band offsets, causing higher interfacial recombination, whereas the inorganic transport layer device showed a minor conduction band offset, resulting in lower recombination. With increasing absorber thickness, the PCE for inorganic (∼30 %) is slightly higher than that for organic (∼29 %). The optimized parameters highlight the advantage of inorganic transport layers for high-performance lead-free Rb<sub>2</sub>SnI<sub>6</sub> perovskite solar cells.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"406 ","pages":"Article 139890"},"PeriodicalIF":2.7,"publicationDate":"2025-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145682198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2025-11-28DOI: 10.1016/j.matlet.2025.139843
Zhijian Lu, Xinyan Xiao, Chao Wang, Lanjun Yang
Achieving high-strength joints in aluminium alloys remains challenging. The superior performance of AA6061 magnetic pulse welding (MPW) joints stems from a dual-scale synergy between interfacial vortices and dynamic recrystallisation (DRX). As the charging voltage increases from 16 to 20 kV, the interface evolves from a flat morphology to steady-state waves with mature Kelvin–Helmholtz instability (KHI) vortices. Electron backscatter diffraction reveals progressive broadening of a DRX-like refined band, with low-angle grain boundaries dominating at 18 kV and high-angle grain boundaries increasing at 20 kV, indicating a dynamic recovery → continuous DRX (cDRX) pathway. Transmission electron microscopy confirms an atomically clean, single-phase fcc-Al interface, indicating KHI-induced self-cleaning. Tensile and nanoindentation tests show that at ≥18 kV, the joint strength approaches the base metal, with a cross-interface ‘hardening peak’ increasing in magnitude and affected width with input energy. These improvements arise from macroscopic geometric interlocking from KHI vortices, combined with Hall–Petch and dislocation-pinning strengthening from cDRX refinement. These mechanisms enhance Al–Al MPW joints.
{"title":"Synergistic strengthening induced by interfacial vortices and dynamic recrystallisation in magnetic pulse welded aluminium alloys","authors":"Zhijian Lu, Xinyan Xiao, Chao Wang, Lanjun Yang","doi":"10.1016/j.matlet.2025.139843","DOIUrl":"10.1016/j.matlet.2025.139843","url":null,"abstract":"<div><div>Achieving high-strength joints in aluminium alloys remains challenging. The superior performance of AA6061 magnetic pulse welding (MPW) joints stems from a dual-scale synergy between interfacial vortices and dynamic recrystallisation (DRX). As the charging voltage increases from 16 to 20 kV, the interface evolves from a flat morphology to steady-state waves with mature Kelvin–Helmholtz instability (KHI) vortices. Electron backscatter diffraction reveals progressive broadening of a DRX-like refined band, with low-angle grain boundaries dominating at 18 kV and high-angle grain boundaries increasing at 20 kV, indicating a dynamic recovery → continuous DRX (cDRX) pathway. Transmission electron microscopy confirms an atomically clean, single-phase fcc-Al interface, indicating KHI-induced self-cleaning. Tensile and nanoindentation tests show that at ≥18 kV, the joint strength approaches the base metal, with a cross-interface ‘hardening peak’ increasing in magnitude and affected width with input energy. These improvements arise from macroscopic geometric interlocking from KHI vortices, combined with Hall–Petch and dislocation-pinning strengthening from cDRX refinement. These mechanisms enhance Al–Al MPW joints.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"406 ","pages":"Article 139843"},"PeriodicalIF":2.7,"publicationDate":"2025-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145682195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2025-11-28DOI: 10.1016/j.matlet.2025.139889
Jiawei Wang, Yanhua Kuang, Tao Xie, Shutong Yan, Abudusaimaiti Kali, Weilin Yan
This study investigates the protective effects of applying silicone impregnation to different cement-based concrete under salt-freezing conditions. Using the isobutyltriethoxysilane (IB) as the impregnating agent, four common types of cement-based concrete were treated: ordinary Portland cement concrete (OPC), slag Portland cement concrete (PSC), pozzolanic Portland cement concrete (PPC), and fly ash Portland cement concrete (PFC). Results show all IB-treated groups exhibit enhanced hydrophobicity and freeze-thaw (F/T) resistance, but with a key novel finding: PSC-IB and PPC-IB achieve optimal F/T performance, with mass loss <200 g/m2 after 28 cycles. PSC-IB shows a statistically significant 39.1 % improvement in relative dynamic modulus of elasticity (RDME) compared to the blank. In contrast, OPC-IB exhibits the highest contact angle (CA) of 116.0°, but its frost resistance is inferior. Energy-dispersive X-ray spectroscopy (EDS) testing reveals that the OPC-IB Ca/Si ratio is approximately 1.49, which is significantly higher than the 0.71 ratio observed in PSC-IC. This is due to the internal porous structure of OPC and its unstable hydration products, which allow water to easily penetrate and freeze during freeze-thaw cycles. This reveals that hydrophobicity alone does not determine protection efficacy; cement-based and microstructure also play an important role.
{"title":"Research on the protective effects of different cement-based concrete surfaces using silicone impregnating agents","authors":"Jiawei Wang, Yanhua Kuang, Tao Xie, Shutong Yan, Abudusaimaiti Kali, Weilin Yan","doi":"10.1016/j.matlet.2025.139889","DOIUrl":"10.1016/j.matlet.2025.139889","url":null,"abstract":"<div><div>This study investigates the protective effects of applying silicone impregnation to different cement-based concrete under salt-freezing conditions. Using the isobutyltriethoxysilane (IB) as the impregnating agent, four common types of cement-based concrete were treated: ordinary Portland cement concrete (OPC), slag Portland cement concrete (PSC), pozzolanic Portland cement concrete (PPC), and fly ash Portland cement concrete (PFC). Results show all IB-treated groups exhibit enhanced hydrophobicity and freeze-thaw (F/T) resistance, but with a key novel finding: PSC-IB and PPC-IB achieve optimal F/T performance, with mass loss <200 g/m<sup>2</sup> after 28 cycles. PSC-IB shows a statistically significant 39.1 % improvement in relative dynamic modulus of elasticity (RDME) compared to the blank. In contrast, OPC-IB exhibits the highest contact angle (CA) of 116.0°, but its frost resistance is inferior. Energy-dispersive X-ray spectroscopy (EDS) testing reveals that the OPC-IB Ca/Si ratio is approximately 1.49, which is significantly higher than the 0.71 ratio observed in PSC-IC. This is due to the internal porous structure of OPC and its unstable hydration products, which allow water to easily penetrate and freeze during freeze-thaw cycles. This reveals that hydrophobicity alone does not determine protection efficacy; cement-based and microstructure also play an important role.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"406 ","pages":"Article 139889"},"PeriodicalIF":2.7,"publicationDate":"2025-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145682253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2025-11-28DOI: 10.1016/j.matlet.2025.139842
Sergey Belyaev , Vasili Rubanik , Vasili Rubanik jr , Natalia Resnina , Dmitry Draba , Maria Starodubova , Vladimir Kalganov , Denis Danilov
Four-layered NiTi samples were deposited by wire arc additive manufacturing (WAAM) on titanium substrate, both under or without the ultrasonic (US) assistance. It was shown that US assistance during WAAM decreased the length of dendrites more than ten times. The US assistance during WAAM decreased the volume fraction of the Ti2Ni phase from 64 to 40 % in bottom layers and from 30 to 13 % in top layers due to a decrease in substrate volume that remelted during deposition of the first layer. The B2 ↔ B19’ transformation occurred in two stages when the sample was deposited without US assistance and it occurs in a single stage when US assistance was applied to the substrate. This effect was attributed to the homogenization of the NiTi phase composition induced by US assistance during WAAM. The deposition of the sample by WAAM under US assistance significantly decreased the sample texture.
{"title":"Influence of ultrasonic assistance during wire arc additive manufacturing on the structure, texture and martensitic transformation in the NiTi shape memory alloy","authors":"Sergey Belyaev , Vasili Rubanik , Vasili Rubanik jr , Natalia Resnina , Dmitry Draba , Maria Starodubova , Vladimir Kalganov , Denis Danilov","doi":"10.1016/j.matlet.2025.139842","DOIUrl":"10.1016/j.matlet.2025.139842","url":null,"abstract":"<div><div>Four-layered NiTi samples were deposited by wire arc additive manufacturing (WAAM) on titanium substrate, both under or without the ultrasonic (US) assistance. It was shown that US assistance during WAAM decreased the length of dendrites more than ten times. The US assistance during WAAM decreased the volume fraction of the Ti<sub>2</sub>Ni phase from 64 to 40 % in bottom layers and from 30 to 13 % in top layers due to a decrease in substrate volume that remelted during deposition of the first layer. The B2 ↔ B19’ transformation occurred in two stages when the sample was deposited without US assistance and it occurs in a single stage when US assistance was applied to the substrate. This effect was attributed to the homogenization of the NiTi phase composition induced by US assistance during WAAM. The deposition of the sample by WAAM under US assistance significantly decreased the sample texture.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"406 ","pages":"Article 139842"},"PeriodicalIF":2.7,"publicationDate":"2025-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145682202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2025-11-28DOI: 10.1016/j.matlet.2025.139892
Junjie Ren , Qianqing Yang , Ye Li , Xinlan Liu , Yihao Zhang
This study integrated molecular dynamics with Monte Carlo simulations to examine radiation-induced defects in Ni30Fe and Ni45Fe alloys under 1 MeV neutron irradiation. The prior studies on neutron irradiation in NiFe alloys did not adequately account for the proportional distribution and average energy of primary knock-on atoms. In contrast, this study provides a more accurate representation of residual point defects and vacancy cluster formation by incorporating these previously overlooked factors. The findings not only align more closely with experimental observations but also offer a clearer microscopic explanation for the macroscopic changes observed in neutron-irradiated NiFe alloys.
{"title":"Point defects and vacancy clusters formed in nickel-iron alloys due to neutron irradiation","authors":"Junjie Ren , Qianqing Yang , Ye Li , Xinlan Liu , Yihao Zhang","doi":"10.1016/j.matlet.2025.139892","DOIUrl":"10.1016/j.matlet.2025.139892","url":null,"abstract":"<div><div>This study integrated molecular dynamics with Monte Carlo simulations to examine radiation-induced defects in Ni<img>30Fe and Ni<img>45Fe alloys under 1 MeV neutron irradiation. The prior studies on neutron irradiation in Ni<img>Fe alloys did not adequately account for the proportional distribution and average energy of primary knock-on atoms. In contrast, this study provides a more accurate representation of residual point defects and vacancy cluster formation by incorporating these previously overlooked factors. The findings not only align more closely with experimental observations but also offer a clearer microscopic explanation for the macroscopic changes observed in neutron-irradiated Ni<img>Fe alloys.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"406 ","pages":"Article 139892"},"PeriodicalIF":2.7,"publicationDate":"2025-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145682254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2025-11-28DOI: 10.1016/j.matlet.2025.139856
Cheng Hai Wang , Li Hong Chang , Rong Kun Fang , Chang Bao Han , Quan Jiang , Hui Yan
Nanoporous calcium silicate (PCS) with well-developed pore structure was prepared by hydrothermal method, and PCS modified cement-based thermal insulator (PMCI) with low thermal conductivity and non-combustible property was prepared by pressing molding process. The decrease in thermal conductivity of PMCI is mainly due to introduction of a large number of micro-nanopores by PCS. PMCI exhibit excellent fire resistance performance because of special structure and the endothermic effect of PCS at high temperature.
{"title":"Cementitious composites with low thermal conductivity by incorporating nanoporous calcium silicate for energy efficient buildings","authors":"Cheng Hai Wang , Li Hong Chang , Rong Kun Fang , Chang Bao Han , Quan Jiang , Hui Yan","doi":"10.1016/j.matlet.2025.139856","DOIUrl":"10.1016/j.matlet.2025.139856","url":null,"abstract":"<div><div>Nanoporous calcium silicate (PCS) with well-developed pore structure was prepared by hydrothermal method, and PCS modified cement-based thermal insulator (PMCI) with low thermal conductivity and non-combustible property was prepared by pressing molding process. The decrease in thermal conductivity of PMCI is mainly due to introduction of a large number of micro-nanopores by PCS. PMCI exhibit excellent fire resistance performance because of special structure and the endothermic effect of PCS at high temperature.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"406 ","pages":"Article 139856"},"PeriodicalIF":2.7,"publicationDate":"2025-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145682265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2025-11-28DOI: 10.1016/j.matlet.2025.139891
Yu Zhao , Jing Zhu , Chao Zeng
This study addresses the challenge of significant residual stress in thick LiCoO2 cathodes for all-solid-state thin-film lithium batteries during high-temperature annealing, which leads to cracking and performance degradation. We propose a solution utilizing titanium nitride (TiN) as an interfacial buffer layer. By depositing TiN layers of varying thicknesses (6, 12, and 18 nm) on substrates, we systematically investigated their effects on the microstructure, residual stress, and electrochemical performance of ∼10 μm thick LiCoO2 films. Results indicate that a 12 nm TiN layer is optimal, inducing a unique bilayer structure in LiCoO2: a lower layer with (003) orientation and an upper layer with (104) orientation, effectively mitigating stress concentration. The corresponding full cell exhibits minimal hysteresis voltage (∼158 mV) and excellent rate capability (86 % capacity retention at 3.5C). This work provides an effective interface-engineering strategy for stress management in thick-film electrodes.
{"title":"TiN interfacial layer induces stress release and crystallographic orientation control in LiCoO2 films to enhance electrochemical performance","authors":"Yu Zhao , Jing Zhu , Chao Zeng","doi":"10.1016/j.matlet.2025.139891","DOIUrl":"10.1016/j.matlet.2025.139891","url":null,"abstract":"<div><div>This study addresses the challenge of significant residual stress in thick LiCoO<sub>2</sub> cathodes for all-solid-state thin-film lithium batteries during high-temperature annealing, which leads to cracking and performance degradation. We propose a solution utilizing titanium nitride (TiN) as an interfacial buffer layer. By depositing TiN layers of varying thicknesses (6, 12, and 18 nm) on substrates, we systematically investigated their effects on the microstructure, residual stress, and electrochemical performance of ∼10 μm thick LiCoO<sub>2</sub> films. Results indicate that a 12 nm TiN layer is optimal, inducing a unique bilayer structure in LiCoO<sub>2</sub>: a lower layer with (003) orientation and an upper layer with (104) orientation, effectively mitigating stress concentration. The corresponding full cell exhibits minimal hysteresis voltage (∼158 mV) and excellent rate capability (86 % capacity retention at 3.5C). This work provides an effective interface-engineering strategy for stress management in thick-film electrodes.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"406 ","pages":"Article 139891"},"PeriodicalIF":2.7,"publicationDate":"2025-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145682252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2025-11-28DOI: 10.1016/j.matlet.2025.139888
Yuling Zhang , Bin Cui , Huilong Xin , Yirong Chen , Zhaojun Jia
Local hypoxia and bacterial infection critically impede osseointegration of titanium implants in large, vasculature-impaired bone defects. To address this, we engineered a multifunctional coating integrating tannic acid (TA) and calcium peroxide (CaO2) onto anodized titanium substrate via a one-pot interfacial synthesis, where TA acted as a chemical anchor that mediated the nucleation and stabilized the oxygen-generating CaO2 within TiO2 nanotubes (TNT). Material characterization confirmed the successful fabrication of a TNT-TA-CaO2 composite coating, which demonstrated sustained oxygen release and effectively alleviated hypoxia in preosteoblasts, while achieving ∼95% antibacterial efficacy against Staphylococcus aureus. This work offers a facile integrated strategy to endow implants with self‑oxygenating and antibacterial capabilities to bolster bone regeneration in hostile microenvironments.
{"title":"Oxygen-supplying self-disinfecting titanium osteoimplants via polyphenol-mediated in-situ growth of CaO2 in TiO2 nanotubes","authors":"Yuling Zhang , Bin Cui , Huilong Xin , Yirong Chen , Zhaojun Jia","doi":"10.1016/j.matlet.2025.139888","DOIUrl":"10.1016/j.matlet.2025.139888","url":null,"abstract":"<div><div>Local hypoxia and bacterial infection critically impede osseointegration of titanium implants in large, vasculature-impaired bone defects. To address this, we engineered a multifunctional coating integrating tannic acid (TA) and calcium peroxide (CaO<sub>2</sub>) onto anodized titanium substrate via a one-pot interfacial synthesis, where TA acted as a chemical anchor that mediated the nucleation and stabilized the oxygen-generating CaO<sub>2</sub> within TiO<sub>2</sub> nanotubes (TNT). Material characterization confirmed the successful fabrication of a TNT-TA-CaO<sub>2</sub> composite coating, which demonstrated sustained oxygen release and effectively alleviated hypoxia in preosteoblasts, while achieving ∼95% antibacterial efficacy against <em>Staphylococcus aureus</em>. This work offers a facile integrated strategy to endow implants with self‑oxygenating and antibacterial capabilities to bolster bone regeneration in hostile microenvironments.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"406 ","pages":"Article 139888"},"PeriodicalIF":2.7,"publicationDate":"2025-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145682203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2025-11-27DOI: 10.1016/j.matlet.2025.139885
Kathiravan S., Gobi Saravanan Kaliaraj
Refractory alloys have played a prominent role, particularly in aerospace applications, for the past few decades. The present study examines the isothermal oxidation resistance of refractory alloy Ta10W at 800 °C and 1000 °C. Electrochemical impedance spectroscopy (EIS) coupled muffle furnace examined the oxidation resistance of Ta10W. A detailed understanding of oxidation kinetics was explored by phase and chemical analysis using X-ray diffraction and X-ray photoelectron spectroscopy (XPS) at. Surface morphology of oxide products was identified using scanning electron microscopy (SEM) as rock. According to the EIS data, the charge transfer resistance values vary over time based on the oxide growth and kinetics is fitted for parabolic fitting as like weight loss due to oxidation.
{"title":"Assessing the oxidation resistance of Ta10W in static high-temperature environments through in-situ EIS and ex-situ kinetic study in high ramping rate (100 °C/ min) for aerospace applications”","authors":"Kathiravan S., Gobi Saravanan Kaliaraj","doi":"10.1016/j.matlet.2025.139885","DOIUrl":"10.1016/j.matlet.2025.139885","url":null,"abstract":"<div><div>Refractory alloys have played a prominent role, particularly in aerospace applications, for the past few decades. The present study examines the isothermal oxidation resistance of refractory alloy Ta10W at 800 °C and 1000 °C. Electrochemical impedance spectroscopy (EIS) coupled muffle furnace examined the oxidation resistance of Ta10W. A detailed understanding of oxidation kinetics was explored by phase and chemical analysis using X-ray diffraction and X-ray photoelectron spectroscopy (XPS) at. Surface morphology of oxide products was identified using scanning electron microscopy (SEM) as rock. According to the EIS data, the charge transfer resistance values vary over time based on the oxide growth and kinetics is fitted for parabolic fitting as like weight loss due to oxidation.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"406 ","pages":"Article 139885"},"PeriodicalIF":2.7,"publicationDate":"2025-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145622347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号