Journal of Materials Science & Technology最新文献_第5页

Unravelling the critical role of biomass carbon dots in atomic co-sharing Sb2S3/Sb2WO6 heterojunctions: Boosting photocatalytic water purification via precise dual-electric field 揭示生物质碳点在原子共共享Sb2S3/Sb2WO6异质结中的关键作用：通过精确的双电场促进光催化水净化

IF 10.9 1区材料科学

Journal of Materials Science & Technology Pub Date : 2025-07-04 DOI: 10.1016/j.jmst.2025.05.058

Li Zhao, Yuanping Liu, Wenwen Qu, Bing Shen, Shu Yang

{"title":"Unravelling the critical role of biomass carbon dots in atomic co-sharing Sb2S3/Sb2WO6 heterojunctions: Boosting photocatalytic water purification via precise dual-electric field","authors":"Li Zhao, Yuanping Liu, Wenwen Qu, Bing Shen, Shu Yang","doi":"10.1016/j.jmst.2025.05.058","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.05.058","url":null,"abstract":"Developing an efficient, recyclable, and sustainable photocatalyst is crucial for the removal of both inorganic and organic pollutants in water matrices. In this study, N-doped biomass carbon dots (NCDs) sensitized Sb2S3/Sb2WO6 (NCSSWO) heterostructures were constructed for simultaneously photocatalytic removals of Cr(Ⅵ) and ofloxacin under 10 W LED irradiation using an in-situ microwave-assisted ion exchange method. The optimal NCSSWO-1 exhibited superior performance for both Cr(Ⅵ) and ofloxacin elimination, yielding up to 24.1 and 1.9 times greater Cr(Ⅵ) and ofloxacin rate constants, respectively, than pristine Sb2WO6. Notably, the ability of NCSSWO-1 to remove Cr(Ⅵ) and ofloxacin in co-existing systems is evidently better than in single-pollutant systems. Experimental and theoretical analyses reveal the prominent activity is attributed to multiple roles caused by the formation of an intense dual-electric field. Specifically, the Sb–S/Sb–O bonds at Sb2S3–Sb2WO6 heterointerface endow atomic co-sharing electron channel for accelerating charge separation. Moreover, the NCDs are imperative for the charge-oriented accumulation near the Sb2WO6 side via van der Waals interactions and provide extra light-harvesting and reactive centers. Additionally, the ofloxacin decomposition process, intermediate biotoxicity, and catalytic mechanism were confirmed. This synergistic eradication strategy of constructing dual Z-scheme heterostructure via interfacial engineering offers valuable insight into developing ternary-based photocatalysts for efficient environment purification.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"684 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144566715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of alumina on Fe-Al intermetallics at the SS-Al bimetallic interface fabricated via wire arc directed energy deposition 氧化铝对丝弧定向能沉积制备的SS-Al双金属界面上Fe-Al金属间化合物的影响

IF 10.9 1区材料科学

Journal of Materials Science & Technology Pub Date : 2025-07-02 DOI: 10.1016/j.jmst.2025.06.013

Amrit Raj Paul, Jayshri Dumbre, Manidipto Mukherjee, Dilpreet Singh, Edwin LH. Mayes, Matthew R. Field, Maciej Mazur, Dong Qiu

{"title":"Effect of alumina on Fe-Al intermetallics at the SS-Al bimetallic interface fabricated via wire arc directed energy deposition","authors":"Amrit Raj Paul, Jayshri Dumbre, Manidipto Mukherjee, Dilpreet Singh, Edwin LH. Mayes, Matthew R. Field, Maciej Mazur, Dong Qiu","doi":"10.1016/j.jmst.2025.06.013","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.06.013","url":null,"abstract":"The development of a high-quality stainless steel (SS)-aluminium (Al) bimetallic transitionally graded structure (TGS) via metal additive manufacturing process has been challenging due to the formation of brittle and crack-prone Iron (Fe)- Al intermetallic compounds (IMCs) at the bimetallic interface. However, it has been observed that the addition of ternary alloying elements can significantly improve the metallurgical and mechanical properties of these IMCs. This study investigates the intricate influence of alumina particles on the SS-Al interface, uncovering insights into melt pool forces, tri-layered IMC formation, nano-grained IMC layers, and an inverse Hall-Petch relationship. Three thin-walled SS-Al structures were deposited via wire arc directed energy deposition (WA-DED), incorporating varying alumina content levels (20, 30, and 40 mg/mm). Alumina decomposition released elemental and gaseous oxygen, affecting IMC layer thickness. Oxygen content at the interface increased with alumina concentration (from 20 mg/mm to 40 mg/mm), which in turn altered Marangoni and buoyancy forces, significantly impacting the IMC thickness and respective grain size. Energy dispersive X-ray spectroscopy and electron back-scattered diffraction analyses revealed FeAl, Fe2Al5, and FeAl3 layers, with Fe2Al5 layer thickness increasing with alumina content. The nanometric grain size of Fe2Al5 and FeAl3 (∼77.69 nm and 52.68 nm) were observed at the bimetallic interface of lower alumina content (20 mg/mm) which justifies their respective hardness with the inverse Hall-Petch relationship. These findings provide valuable insights into interface dynamics and offer quantitative data for optimising SS-Al structures in diverse applications.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"19 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144533885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design and modification strategies of covalent organic frameworks for photocatalytic hydrogen/hydrogen peroxide production 光催化制氢/过氧化氢共价有机框架的设计与修饰策略

IF 10.9 1区材料科学

Journal of Materials Science & Technology Pub Date : 2025-07-02 DOI: 10.1016/j.jmst.2025.06.015

Yuhao Yan, Lei Hao, Zhiqiang Ren, Rongchen Shen, Guijie Liang, Peng Zhang, Yuan Teng, Difa Xu, Xin Li

{"title":"Design and modification strategies of covalent organic frameworks for photocatalytic hydrogen/hydrogen peroxide production","authors":"Yuhao Yan, Lei Hao, Zhiqiang Ren, Rongchen Shen, Guijie Liang, Peng Zhang, Yuan Teng, Difa Xu, Xin Li","doi":"10.1016/j.jmst.2025.06.015","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.06.015","url":null,"abstract":"Amidst escalating environmental degradation and energy crises, the pursuit of renewable energy alternatives to fossil fuels has become a global imperative. Covalent organic frameworks (COFs), as emerging crystalline porous materials, demonstrate exceptional capabilities in solar-to-chemical energy conversion through the generation of clean fuels like molecular hydrogen (H2) and hydrogen peroxide (H2O2). The development of efficient semiconductor photocatalysts is pivotal for advancing next-generation energy technologies. This study presents a systematic analysis of the four critical rate-determining steps in COFs photocatalysis: (1) photon absorption, (2) exciton dissociation, (3) charge carrier diffusion and complexation, and (4) surface redox reactions. The kinetic constraints and thermodynamic barriers associated with H2/H2O2 production by COFs-based photocatalytic systems are critically evaluated, with particular emphasis on advanced regulation strategies: (i) enhancing light-harvesting through conjugated structure optimization and external sensitization, (ii) promoting exciton dissociation via Förster resonance energy transfer and localized electronic structure modulation, (iii) strengthening charge separation via crystallinity engineering and polarized field enhancement, and (iv) increasing surface active sites through microenvironment tailoring and cocatalyst integration while reducing reaction energy barriers via pH optimization. Finally, current challenges and future design paradigms for constructing COFs with enhanced photocatalytic performance are critically analyzed, with special consideration of stability-activity trade-offs and scalable synthesis protocols.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"170 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144533884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Black g-C3N4-based hydrogel for water evaporation and photothermal persulfate activation 黑色g- c3n4基水凝胶用于水蒸发和光热过硫酸盐活化

IF 10.9 1区材料科学

Journal of Materials Science & Technology Pub Date : 2025-07-02 DOI: 10.1016/j.jmst.2025.06.014

Wei Huang, Xiyuan Gao, Lei Sun, Haojie Chen, Pengnian Shan, Yu Shen, Shunhong Zhang, Lijing Wang, Changyu Lu, Weilong Shi

{"title":"Black g-C3N4-based hydrogel for water evaporation and photothermal persulfate activation","authors":"Wei Huang, Xiyuan Gao, Lei Sun, Haojie Chen, Pengnian Shan, Yu Shen, Shunhong Zhang, Lijing Wang, Changyu Lu, Weilong Shi","doi":"10.1016/j.jmst.2025.06.014","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.06.014","url":null,"abstract":"Integrating the evaporation of seawater at the interface with the treatment of wastewater presents an encouraging approach to address urgent energy and environmental issues. Nevertheless, the development of dual-function evaporators endowed with synergistic photothermal advanced oxidation catalytic properties presents significant hurdles. In this study, a black g-C3N4/loofah/chitosan (BCN/LF/CS) hydrogel was developed, demonstrating remarkable abilities in absorbing sunlight and converting it thermally. This innovation is intended for solar-driven evaporation and the thermal activation of persulfate (PS), which aids in the degradation of tetracycline (TC) contaminants. Test results demonstrated that under singular sunlight irradiation, BCN/LF/CS hydrogel not only achieves an impressive evaporation rate of 2.5 kg m−2 h−1 but also effectively catalyzes the decomposition of PS, leading to substantial degradation of TC (Concertation: 50 mg/L, PS dose: 0.03 g/L, 86% degradation rate: in 3 h). The research unveils innovative and ingenious methodologies to alleviate freshwater scarcity and address the pressing issue of water pollution which introduces a groundbreaking approach to the development of advanced solar evaporators that seamlessly integrate seawater desalination with sewage purification.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"70 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144533887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Heat-healing strategy by low-melting alloy to achieve Li metal anode stable cycling at high current density 采用低熔点合金热愈合策略实现锂金属阳极在高电流密度下的稳定循环

IF 10.9 1区材料科学

Journal of Materials Science & Technology Pub Date : 2025-07-02 DOI: 10.1016/j.jmst.2025.05.056

Yulong Shao, Ruyi Li, Yan Li, Keer Chen, Shaowen Zhang, Xuan Sun, Jingjing Zhou, Yang Liu, Bingkun Guo

引用次数: 0

COSE/Cu hybrid films constructed by Cu2+ mediation with camellia oleifera shell extracts for Q235 steel anti-corrosion 以Cu2+为介质，油茶壳提取物构建COSE/Cu杂化膜用于Q235钢的防腐

IF 10.9 1区材料科学

Journal of Materials Science & Technology Pub Date : 2025-07-02 DOI: 10.1016/j.jmst.2025.05.055

Shuli Li, Xianghong Li, Hao Zhang, Yujie Qiang, Chang Liu, Ye Zhang, Shuduan Deng

{"title":"COSE/Cu hybrid films constructed by Cu2+ mediation with camellia oleifera shell extracts for Q235 steel anti-corrosion","authors":"Shuli Li, Xianghong Li, Hao Zhang, Yujie Qiang, Chang Liu, Ye Zhang, Shuduan Deng","doi":"10.1016/j.jmst.2025.05.055","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.05.055","url":null,"abstract":"An organic-inorganic hybrid film on the Q235 steel surface has been in situ constructed through the unique synergy of camellia oleifera shell extracts (COSE) and Cu2+, displaying excellent and stable corrosion inhibition performances in 1.0 M HCl solution. The inhibition performances and the underlying synergistic mechanisms of the COSE/Cu hybrid film are deeply investigated by combining experimental and theoretical approaches as well as comprehensive characterizations. It clarifies that the COSE/Cu hybrid film is primarily composed of adsorbed COSE organics and the in situ generated Cu nanoparticles. The COSE/Cu hybrid film can significantly enhance the hydrophobicity of the steel surface and improve the inhibition efficiency (96.30%) for Q235 steel in 1.0 M HCl solution. Electrochemical tests show that COSE/Cu significantly inhibits cathodic corrosion reactions, increases Rct to 741.0 Ω cm2, and has the lowest unified interface reaction coefficient (0.9×10−5 s−1). Quantum chemistry, molecular dynamics simulations, and density functional theory calculations results show that the synergy between Cu²⁺ and the active components of COSE promoted both charge transfer between COSE/Cu and Fe and adsorption on the steel surface. This research firstly represents the systematic exploration of the active components of COSE for corrosion inhibition and simultaneously reveals the unique synergistic mechanism between COSE and Cu2+ in detail.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"27 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144533883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Photoelectric coupling enhanced absorbers for boosting thermoelectric generation 用于促进热电发电的光电耦合增强吸收器

IF 10.9 1区材料科学

Journal of Materials Science & Technology Pub Date : 2025-07-01 DOI: 10.1016/j.jmst.2025.05.054

Wenhe Zhang, Chengbing Wang, Jingjing Jin, Lu Wang, Fan Wang, Zexiang Zhao, Zehua Zhang, Jinchi Ma

{"title":"Photoelectric coupling enhanced absorbers for boosting thermoelectric generation","authors":"Wenhe Zhang, Chengbing Wang, Jingjing Jin, Lu Wang, Fan Wang, Zexiang Zhao, Zehua Zhang, Jinchi Ma","doi":"10.1016/j.jmst.2025.05.054","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.05.054","url":null,"abstract":"Solar thermoelectric generation is an advanced technology with potential in renewable and green energy. However, developing stable photothermal materials with low thermal radiation loss still poses challenges for improving thermoelectric output performance. Here, we developed an Al-doping TiO2 photoelectric coupling enhanced absorber (ATO–PCEA) based on multilayer nanoparticle-enhanced-absorption coatings using magnetron sputtering. With the interference effect of multilayer nanofilms and the sputter-deposited atoms or particles of Al and TiO2 formed ordered layer-by-layer enlargement nanoparticles that strengthened the electric-field coupling effect, ATO–PCEA has an efficient solar absorptance of 0.942 and a low thermal emissivity of 0.163, significantly increasing the local photothermal temperature. Notably, a solar thermoelectric generation device was constructed by integrating the ATO–PCEA with a thermoelectric element and assisted by a heat dissipation system. Benefitting from its excellent photothermal conversion (PTC) performance, the device generates a power density of 0.536 W/m2 under 1.0 sun, which is 28.7 and 1.1 times higher than that of the thermoelectric generator without the photothermal absorber and the blackbody absorber, respectively. This work provides new perspectives and ideas for photothermal performance enhancement and application expansion of absorbers.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"27 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144533888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In-plane anisotropic photoresponse enhancement in ZrSe3 through pressure-regulated electronic coupling between Se–Se dimers 通过硒硒二聚体之间的压力调节电子耦合增强ZrSe3的面内各向异性光响应

IF 10.9 1区材料科学

Journal of Materials Science & Technology Pub Date : 2025-07-01 DOI: 10.1016/j.jmst.2025.05.051

Yao Wu, Ran Liu, Lei Yue, Yue Lin, Yifeng Jiang, Danian Wang, Yuankai Li, Quanjun Li, Qing Dong, Xiaoyi Wang, Chaoquan Hu

{"title":"In-plane anisotropic photoresponse enhancement in ZrSe3 through pressure-regulated electronic coupling between Se–Se dimers","authors":"Yao Wu, Ran Liu, Lei Yue, Yue Lin, Yifeng Jiang, Danian Wang, Yuankai Li, Quanjun Li, Qing Dong, Xiaoyi Wang, Chaoquan Hu","doi":"10.1016/j.jmst.2025.05.051","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.05.051","url":null,"abstract":"Intrinsically anisotropic photoelectric materials have the capability to combine light detection with polarization sensing, which is essential for advancing next-generation polarization-dependent optoelectronic devices. However, achieving both a high anisotropy ratio and superior photoresponse in current materials remains challenging, creating a need for effective regulation techniques. Here, a novel paradigm is presented for applying pressure as a regulating knob to enhance both photoresponse and its anisotropy by overcoming the limitation imposed by the inherent in-plane bonding anisotropy of ZrSe3. In situ high-pressure experiments show that the photoresponsivity along the a/b-axis increases by three orders of magnitude within 0.1–16.0 GPa, while its anisotropy ratio improves from 0.9 to 1.7. First-principles calculations confirm that the enhanced electronic coupling between Se–Se dimers along the a-axis under pressure promotes photo-generated carriers' transport and separation, leading to higher photoresponse than along the b-axis. In addition, ZrSe3 exhibits a rare self-driven positive-negative photocurrent transition at approximately 7.4 GPa, which can well detect the pressure-induced n-p conduction switch in photoelectric materials. This study employs ZrSe3 as a model material and opens up a new approach for pressure to regulate photoresponse anisotropy and, more broadly, provides valuable insights into materials design toward extraordinary properties.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"69 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144521414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Self-assembly LDHs nanosheets/silk fibroin multilayer coating with enhanced biocompatibility, photothermal antimicrobial activity, and self-healing property 具有增强生物相容性、光热抗菌活性和自修复性能的自组装LDHs纳米片/丝素多层涂层

IF 10.9 1区材料科学

Journal of Materials Science & Technology Pub Date : 2025-07-01 DOI: 10.1016/j.jmst.2025.05.050

Yanning Chen, Wenjing Zhao, Hao Liu, Zhihan Zhang, Weihua Gu, Wenbo Du, Cao Wu, Yuehua Sun, Sixian Rao, Kang Yang

{"title":"Self-assembly LDHs nanosheets/silk fibroin multilayer coating with enhanced biocompatibility, photothermal antimicrobial activity, and self-healing property","authors":"Yanning Chen, Wenjing Zhao, Hao Liu, Zhihan Zhang, Weihua Gu, Wenbo Du, Cao Wu, Yuehua Sun, Sixian Rao, Kang Yang","doi":"10.1016/j.jmst.2025.05.050","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.05.050","url":null,"abstract":"Rapid corrosion and bacterial infection are obstacles to the utilization of biodegradable magnesium alloys as biomedical materials. In this study, a polydopamine (PDA)/silk proteins (SF)-coated ternary Mg-Al-La layered double hydroxides (LDHs) coating (TLDHs-PDA-SF coating) prepared on the magnesium alloy surface by self-assembly method was proposed. The TLDHs-PDA-SF coating exhibited good self-healing, antimicrobial activity (especially under 808 nm irradiation), and biocompatibility. This heterogeneous coating can quickly self-heal within 24 h and inhibit cathodic corrosion due to the interference of rare earth cations with local alkalinization and the spontaneous polymerization of PDA. Due to the synergistic effect of the photosensitivity of PDA and the thermal insulation of SF, it has good bactericidal properties against Staphylococcus aureus (S. aureus) under near-infrared (NIR) irradiation, and the antibacterial rate reaches 98.71 %. In vitro results showed that SF and PDA could enhance L929 cytocompatibility, with more than 100.2 % cell viability. This work provides a strategy for the preparation of composite coatings on magnesium-based implants with the triple functions of antimicrobial capacity, self-healing, and biocompatibility.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"47 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144521404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermal modulation impacts on α-phase restructuring in directionally annealed TiAl: γL deformation mechanism at 900°C 900℃时热调制对TiAl: γL定向退火变形机制中α相重构的影响

IF 10.9 1区材料科学

Journal of Materials Science & Technology Pub Date : 2025-07-01 DOI: 10.1016/j.jmst.2025.05.053

Zedong Liu, Jieren Yang, Yunlu Ma, Bo Peng, Ying Liu, Ruirun Chen

{"title":"Thermal modulation impacts on α-phase restructuring in directionally annealed TiAl: γL deformation mechanism at 900°C","authors":"Zedong Liu, Jieren Yang, Yunlu Ma, Bo Peng, Ying Liu, Ruirun Chen","doi":"10.1016/j.jmst.2025.05.053","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.05.053","url":null,"abstract":"This study examines the impact of varied hot zone temperatures on the microstructural evolution of γ-TiAl alloy during directional annealing and its tensile properties at 900°C. Using the scanning electron microscope, electron backscatter diffraction, and transmission electron microscopy, the research focuses on the deformation mechanisms of γL at 900°C. Key findings include a positive correlation between the aspect ratio of α columnar crystals and hot zone temperature, with optimal conditions under non-isothermal continuous heating (e.g., 1350°C → 1410°C). The reduction of transverse grain boundaries in α columnar crystals enhances the ductility of the TiAl alloy at 900°C. The presence of active micron-scale γM within the near-lamellar structure is found to be detrimental to high-temperature ductility. Discontinuous dynamic recrystallization (DDRX) and continuous dynamic recrystallization are identified as the primary softening mechanisms during high-temperature deformation, with dynamic recrystallization grains potentially multiplying according to an interface relationship of <110>/70°. Cross-slip of numerous 1/2[110] ordinary dislocations facilitate DDRX and certain twin behaviors within DRX grains. These insights contribute to understanding the anisotropic migration capabilities of α grain boundaries influenced by varying (α+γ)/α hot zone temperatures and the deformation mechanisms of γ-TiAl alloy at 900°C.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"582 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144521453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0