Journal of Materials Science & Technology最新文献

{"title":"Modification of detrimental π-Fe phase in Al-7Si-0.6Mg alloy","authors":"Jietao Feng, Canfeng Fang, Rong Wang, Yuanjiang Tu, Xiao Feng, Wu Gao, Min Liu, Yingmin Wang","doi":"10.1016/j.jmst.2025.01.091","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.01.091","url":null,"abstract":"The regulation of the detrimental π-Fe phase has been the primary concern in Al-7Si-Mg cast alloys. In this work, a two-stage solution treatment is conducted for the complete dissolution of the Mg₂Si phase in the low-temperature stage and for manipulating the decomposition of the π-Fe phase in the high-temperature stage. This approach allows for a systematic investigation into the effect of solution temperature on the decomposition behavior of the π-Fe (Al₈Mg₃FeSi₆) phase while avoiding incipient melting. The coarse π-Fe particles form an interconnected and branched structure in the as-cast microstructure, wrapping the <em>α</em>-Al dendritic arms and isolating the <em>α</em>-Al grains. The π-Fe structure underwent subtle change during the solution treatment at 540°C. At the elevated solution temperature of 560°C, the π-Fe phase decomposed into a fine <em>β</em>-Fe phase, accompanied by particle fragmentation and shape change into the granular form. The modification of the π-Fe phase has achieved a simultaneous enhancement in the strength and ductility of the alloy.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"91 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143893093","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}

{"title":"Organic/inorganic composite S-scheme photocatalyst with enhanced light absorption and H2O2-production activity","authors":"Libo Wang, Jinsheng Zhao","doi":"10.1016/j.jmst.2025.04.009","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.04.009","url":null,"abstract":"Photocatalytic H₂O₂ production from H₂O and O₂ offers a sustainable route but is hindered by the limitations of single-component catalysts, such as narrow light absorption and rapid charge recombination. To address this, an organic/inorganic composite S-scheme heterojunction is constructed through the in-situ growth of In₂S₃ nanosheets on a covalent organic framework (COF), synergistically enhancing light harvesting, carrier separation, and redox capacity. In-situ irradiated XPS, femtosecond transient absorption (fs-TA) spectroscopy, and density functional theory (DFT) calculations jointly reveal the charge transfer dynamics of the COF/In₂S₃ composite. As a result, the optimized S-scheme heterojunction achieves a remarkable H₂O₂ production rate of 5713.2 µmol g⁻¹ h⁻¹ in pure water. This work advances the design of S-scheme heterojunction design for optimizing COF-based photocatalysts and deepens the understanding of molecular energy-level engineering.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"49 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143893101","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}

{"title":"Transition metal ions induce pH-dependent coordination bonds, ionic conductivity and in-situ magnetic particles for tailoring microwave absorption of gels","authors":"Shusheng Wang, Shengchong Hui, Zijing Li, Zhaoxiaohan Shi, Yuntong Wang, Limin Zhang, Hongjing Wu","doi":"10.1016/j.jmst.2025.03.059","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.03.059","url":null,"abstract":"Transition metal ions possess specific properties and coordination chemistry, and the products of complexation reactions, such as complexes and free ions, can modulate the dielectric properties and ionic conductivity of gels. Nevertheless, the lack of a relationship between the coordination modes of metal complexes and electromagnetic wave (EMW) loss limits its application in the EMW absorbing field. Herein, we fabricated pH-dependent gel networks by coordinating with transition metal ions (Fe³⁺, Cu²⁺, and Zn²⁺), which successfully regulate dielectric properties, enhance ionic conductivity, and optimize the EMW absorption properties. Moreover, the gels modified by iron ions exhibit the magnetic response to EMW via in-situ synthesized iron oxides, further improving the impedance matching of the materials. The FePT-2 sample exhibits optimal effective absorption bandwidth (EAB) of 5.61 GHz at 1.5 mm, which expands by approximately 63% over PT, achieving broad-range EMW absorption in X and Ku bands. This study actualizes the regulation of coordination modes of the dielectric response and in-situ magnetic particles within gels for the first time and develops a novel design strategy for optimizing the EMW absorption of gels.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"20 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143893091","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}

{"title":"Hierarchical engineering for multifunctional EMI shielding composite via dual incorporation of FeCo nanoparticles and carbon layer","authors":"Heguang Liu, Min Hu, Yujia Yang, Yiwei Shao, Na Tian, Caiyin You","doi":"10.1016/j.jmst.2025.02.080","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.02.080","url":null,"abstract":"The proliferation of advanced electronics and devices has led to significant electromagnetic interference and pollution, resulting in heightened interest in electromagnetic interference (EMI) shielding materials in recent years. Carbon foam, as a typical porous carbonaceous material, demonstrates significant potential as an innovative EMI shielding material owing to its lightweight nature, exceptional porosity, flexibility, favorable processability, and environmental sustainability. Nonetheless, the configuration of carbon atoms within the carbon foam is significantly disordered, leading to its intrinsic conductivity being comparatively low. Consequently, its shielding efficacy cannot meet the standards required for commercial EMI materials. Herein, we propose a hierarchical engineering strategy to construct a carbon foam composite with high shielding efficacy. Specifically, the FeCo nanoparticles and carbon layer are concurrently integrated into the carbon foam matrix to modulate its magnetic characteristics and conductivity. The results demonstrate that the carbon-coated FeCo/carbon foam composite achieves a shielding effectiveness (SE) of 24 dB in the X-band, signifying a 240% improvement compared to the pristine carbon foam. Simultaneously, the composite also exhibits superior multifunctionalities involving flexibility, Joule heating, and hydrophobicity. This study provides a facile and effective routine to regulate the shielding efficacy of EMI shielding materials.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"35 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143893092","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}

{"title":"Innovative design of Ag-based braze alloy and composites for dissimilar joints: Strategies and prospects","authors":"Zongye Ding, Junchao Yang, Guan Huang, Yongtao Jiu, Weimin Long, Sujuan Zhong, Jian Qin, Quanbin Lu, Hao Guo, Jianguo Li, Qiaodan Hu","doi":"10.1016/j.jmst.2025.04.006","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.04.006","url":null,"abstract":"Ag-based braze alloy has emerged as a promising filler for the fabrication of key components through joining between dissimilar materials, including but not limited to metals, ceramic, glass, graphite, diamond and C/C composite. A tremendous effort has been employed to develop new types of Ag-based braze alloy and composite braze alloy with desirable properties. However, the continuous emergence of new materials, extreme complexity of brazing structure and extreme severity of service environment continuously addresses new challenges for the new materials under extreme conditions, including the poor wettability, excessive brittle phase, high residual stress and deteriorated property of brazed joints, hindering the development of key components. This review is anticipated to deliver new guidelines for the design and utilization of Ag-based braze alloy and composite braze alloy toward the practical application in brazing with a desirable performance. Additionally, perspectives on future Ag-based braze alloy development are discussed.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"138 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143890260","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}

{"title":"In-situ observation of electron injection to surface carbon layer from illuminated hematite for efficient solar water oxidation","authors":"Ye Zhu, Cheng Lu, Yong Feng, Jiabin Xu, Shuo Li, Bai Xu, Haifeng Zhao, Kun Feng, Jun Zhong","doi":"10.1016/j.jmst.2025.03.054","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.03.054","url":null,"abstract":"In-situ observation of the charge transfer plays a key role in understanding the working mechanism of hematite for solar water oxidation. Here by using in-situ X-ray absorption spectroscopy (XAS), the electron injection from illuminated hematite (photon-excited electron) to the surface carbon layer can be clearly identified, which can facilitate the charge separation and then improve the performance. As a result, the carbon-coated and Sn-doped hematite photoanode (C-Sn-Fe₂O₃) shows a greatly enhanced photocurrent density of 2.3 mA/cm² at 1.23 V_RHE, which is 2.3 times that of the pristine hematite. The injected electron can modify the chemical state of surface groups in the carbon layer and be quickly transferred to the electrode due to the high conductivity of the carbon layer, leaving behind the high-valence Fe⁴⁺ with high oxidation capability to enhance the performance. By coupling with the FeNiOOH co-catalyst, the photoanode can finally achieve a high photocurrent density of 3.0 mA/cm² at 1.23 V_RHE with a low onset potential of 0.76 V_RHE. The understanding of the charge migration route by using in-situ XAS offers a novel way for the design of highly efficient solar water oxidation materials.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"10 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143889812","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}

{"title":"Insights into crystal growth and morphology evolution mechanism of multi-component carbide: Experiments and first-principles calculations","authors":"Yong Fan, Yuyao Chen, Jin Wang, Lei Gu, Kaixuan Zhou, Yuanyuan Gong, Wei Liu, Yonghao Zhao, Xiangfa Liu, Jinfeng Nie","doi":"10.1016/j.jmst.2025.03.057","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.03.057","url":null,"abstract":"Multi-component transition metal carbides (MTMCs) have garnered significant attention for their outstanding high-temperature stability and versatile properties, which make them ideal candidates for a wide range of industrial applications. However, the underlying mechanisms governing the crystal growth and morphological evolution of MTMCs remain poorly understood, hindering the design of materials with tailored characteristics. In this paper, we employ an in-situ liquid-solid reaction method to synthesize (HfTaZrNbTi)C MTMC powders and explore their crystal growth and morphology evolution. The synthesized (TiZrHfNbTa)C powders exhibit two distinct morphologies: cubic, primarily composed of Ti, Hf, Ta, and Zr with a small amount of Nb, and octahedral, rich in Ti and Ta with minor amounts of Hf, Nb, and Zr. First-principles calculations show that the surface energy of the (100) plane is lower than the (111) plane, leading to the formation of the cubic morphology. The octahedral morphology forms due to decreased mixing entropy and higher theoretical density compared to cubic particles. Our findings provide valuable insights into the crystal growth and morphology evolution mechanisms of high-entropy ceramics, contributing to the rational design of MTMCs with engineered crystal structures for diverse structural and functional applications.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"104 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143893094","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}

{"title":"Effect of aluminum and zinc on the corrosion behavior of AZ (Mg-Al-Zn) series magnesium alloys","authors":"Jingying Li, Hao Liu, Li Liu, Chongqing Guo, Lihui Yang, Jiarun Li, Jia Wang","doi":"10.1016/j.jmst.2025.04.007","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.04.007","url":null,"abstract":"The microstructures and corrosion behaviors of AZ series magnesium alloys (AZ31, AZ61, AZ91, AZ62, and AZ63) were investigated via materials characterization, immersion, and electrochemical tests. Both Al and Zn can promote the corrosion of magnesium alloys via promoting the segregations of β-Mg₁₇Al₁₂ and eutectic α phases, respectively. AZ63 magnesium alloy performs the highest corrosion rate due to the high amount of eutectic α phases, which facilitates the desorption of corrosion products. The area ratio of products free region on the electrode surface and activity of univalent Mg ion (<em>C</em>_Mg+) as two state variables, which would give rise to capacitive and inductive responses in electrochemical impedance spectroscopy responses, were interpreted by the kinetics of electrode process, respectively.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"25 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143893095","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}

{"title":"Cr-leaching induced in-situ surface reconstruction of trimetallic CoFeCr-hydroxide on Ni foam for highly efficient water oxidation","authors":"Xiaorui Wang, Lingxing Zan, Hongling Zhang, Kun Tian, Dan Zhu, Jian Li, Qiang Weng, Cuicui Wang, Qingbo Wei, Wenlin Zhang, Xiangyang Hou, Feng Fu","doi":"10.1016/j.jmst.2025.03.056","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.03.056","url":null,"abstract":"Rationally regulating the inevitable dynamic evolution of the catalyst surface structure towards high efficiency for water electrolysis remains a significant challenge. Here, the ternary cobalt-iron-chromium double hydroxide (DH) was synthesized on nickel foam as a monolithic catalytic electrode (CoFeCr-DH/NF) for the oxygen evolution reaction (OER) via a simple electrodeposition technique. The optimized Co_0.7Fe_0.3Cr-DH/NF electrode exhibited remarkable catalytic activity and stability. The overpotential at the current density of 100 mA cm⁻² is only 281 mV, far exceeding those of other monolithic catalytic electrodes. Furthermore, we elucidated the variations in the valence states of metals during the OER process and found the electrochemical oxidation of Co²⁺ to Co³⁺ and leaching of Cr. Importantly, Cr-leaching can induce surface reconstruction, which not only optimizes the surface electronic structure to enhance the intrinsic activity but also increases the surface irregularity to enlarge the electrochemically active surface area, thereby significantly improving the OER performance. Theoretical calculations revealed that OER preferentially occurred at the adjacent Cr-leached Co sites and confirmed that the Cr-leached trimetallic CoFeCr-DH performs an outstanding OER performance.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"11 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143893096","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}

{"title":"Defect dipole gradient design in (K,Na)NbO3-based piezoelectric ceramics enabling controllable ultrahigh bending deformation","authors":"Hongjie Zhang, Binquan Wang, Jie Wang, Qichao Li, Zhenhua Ma, Tiannan Yang, Yiping Guo","doi":"10.1016/j.jmst.2025.04.008","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.04.008","url":null,"abstract":"Piezoelectric ceramic bending actuators play a pivotal role in various high-tech applications. As a new strategy for fabricating bending actuators, constructing defect dipole concentration gradient has emerged as an effective strategy for boosting electro-bending displacement, yet achieving reproducibility remains challenging due to the uncontrollable alkali volatilization. Herein we propose a new strategy to fabricate barium-doped (K,Na)NbO₃ piezoelectric bending actuators with controllable gradient distribution of highly stable &lt;110&gt;-oriented (<span><span style=\"\"><math><msubsup is=\"true\"><mi is=\"true\">V</mi><mrow is=\"true\"><mi is=\"true\" mathvariant=\"normal\">K</mi><mo is=\"true\">/</mo><mtext is=\"true\">Na</mtext></mrow><msup is=\"true\"><mrow is=\"true\"></mrow><mo is=\"true\">′</mo></msup></msubsup></math></span><span style=\"font-size: 90%; display: inline-block;\" tabindex=\"0\"></span><script type=\"math/mml\"><math><msubsup is=\"true\"><mi is=\"true\">V</mi><mrow is=\"true\"><mi mathvariant=\"normal\" is=\"true\">K</mi><mo is=\"true\">/</mo><mtext is=\"true\">Na</mtext></mrow><msup is=\"true\"><mrow is=\"true\"></mrow><mo is=\"true\">′</mo></msup></msubsup></math></script></span> – <span><span style=\"\"><math><msubsup is=\"true\"><mi is=\"true\">V</mi><mrow is=\"true\"><mi is=\"true\" mathvariant=\"normal\">O</mi></mrow><mrow is=\"true\"><mo is=\"true\">·</mo><mo is=\"true\">·</mo></mrow></msubsup></math></span><span style=\"font-size: 90%; display: inline-block;\" tabindex=\"0\"></span><script type=\"math/mml\"><math><msubsup is=\"true\"><mi is=\"true\">V</mi><mrow is=\"true\"><mi mathvariant=\"normal\" is=\"true\">O</mi></mrow><mrow is=\"true\"><mo is=\"true\">·</mo><mo is=\"true\">·</mo></mrow></msubsup></math></script></span>) defect dipoles, achieving a centimeter-level displacement performance of 1.2 cm under ± 200 V sinusoidal AC excitations. Samples with defect gradient design but lower oxygen vacancy content exhibit larger bending displacement and excellent fatigue stability without leakage conduction, confirming that the defect dipole concentration gradient, rather than oxygen vacancy migration drives the large bending deformation. Experimental analysis combined with phase-field simulations uncovers that the delicate concentration design of &lt;110&gt;-oriented defect dipoles within orthorhombic stripe domains plays crucial roles in controllable and stable displacement output. We validate the feasibility of the bending actuators in piezoelectric haptic feedback and piezoelectric micro-pump applications, providing new insights into the design of piezoceramic actuators.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"20 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143893175","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}