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Ti deficiency and its effect on synthesizing all-d-metal Heusler alloy powders via mechanical alloying

Materials Characterization 2025年 224卷

作者： Zhang, Hongguo Shi, Jinhao Zhang, Zhentao Wang, Xiangming Yue, Ming College of Materials Science and Engineering State Key Laboratory of Materials Low-Carbon Recycling Key Laboratory of Advanced Functional Materials Ministry of Education Beijing University of Technology Beijing100124 China Hefei230031 China

This study proposes and realizes the synthesis of powder and bulk Ni-Co-Mn-Ti-based all-d-metal Heusler alloys through mechanical alloying and powder metallurgy. Ti deficiency was found and recognized as a critical factor for the phase formation in similar compounds. By adjusting the Ti content, alloying and heat treatment process, L10, B2, and 5 M martensitic phases can be obtained. Martensitic phase transformation temperatures can also be adjusted through various factors involved in the process. The absence of a metamagnetic transition up to 3 T was observed in the bulk samples, which is related to the small magnetization difference during the phase transformation. A maximum magnetic entropy change comparable to alloys produced via rapid quenching was achieved. The present method is an effective and flexible route to fabricating powders of all-d-metal alloys with tailored structural and magnetic properties. It can serve as a pre-process for advanced manufacturing and provide new phase control choices in related systems. © 2025 Elsevier Inc.

关键词： Titanium alloys

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3D printing of (Cf-Csf)/ZrB2-SiC composites through coextrusion of flexible pre-infiltrated Cf/ZrB2 fiber bundle and Csf/ZrB2 paste

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Ceramics International 2025年

作者： Zhang, Yixin Cheng, Yehong Fang, Jinming Ma, Denghao Sun, Xin Li, Junping An, Yumin Hu, Ning Zhao, Libin School of Mechanical Engineering Hebei University of Technology Tianjin300401 China Ministry of Education Tianjin300401 China Key Laboratory of Hebei Province on Scale-span Intelligent Equipment Technology Tianjin300401 China Chongqing Science Innovation Center Hebei University of Technology Chongqing401135 China Science and Technology of Advanced Functional Composite Materials Laboratory Aerospace Research Institute of Materials and Processing Technology Beijing100076 China State Key Laboratory of Reliability and Intelligence Electrical Equipment Hebei University of Technology Tianjin300401 China

This work addresses two major challenges in 3D printed ceramic composites: inadequate ceramic matrix infiltration in fiber bundles and the lack of optimized fiber-matrix interfaces. We developed a breakthrough fabrication strategy featuring: A tailored flexible carbon coating specifically designed for 3D printing applications, deposited on carbon fibers to create a suitable interface;A specialized pre-infiltration method enabling uniform ceramic slurry distribution in continuous carbon fiber bundles;and A unique co-extrusion process combining flexible pre-infiltrated Cf/ZrB2 bundles with Csf/ZrB2 paste. The resulting (Cf-Csf)/ZrB2-SiC composites, fabricated through multi-cycle precursor infiltration-pyrolysis, demonstrate remarkable mechanical properties (flexural strength: 237.6 MPa;fracture toughness: 7.30 MPa m1/2) and exceptional ablation resistance (enduring 2190 °C surface temperatures for 1320 s in wind tunnel testing). This work establishes a new paradigm for manufacturing ultra-high temperature ceramic composites with simultaneously enhanced mechanical and thermal performance. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Fracture toughness

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Practical Evaluation of Presodiation Techniques for High Energy Sodium-Based Batteries

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ACS Nano 2025年第18期19卷 17062-17086页

作者： Lin, Kui Liu, Ming Qin, Xianying Zheng, Guorui Liang, Junwei Li, Baohua Jiang, Chunhai Fujian Provincial Key Laboratory of Functional Materials and Applications Institute of Advanced Energy Materials School of Materials Science and Engineering Xiamen University of Technology Xiamen361024 China Shenzhen Key Laboratory on Power Battery Safety Research Shenzhen Geim Graphene Center Tsinghua Shenzhen International Graduate School Shenzhen518055 China Shenzhen Graphene Innovation Center Co. Ltd. Shenzhen518055 China

Low-cost rechargeable sodium-based batteries are regarded as ideal alternatives to replace or complement current lithium-ion batteries in large-scale energy storage applications. Unfortunately, the commercial implementation of sodium-based batteries is restricted by their unsatisfied energy density, severe initial capacity decay, and discontented cycle life. Presodiation techniques including anode pretreatment and cathode additives are widely suggested to alleviate the above problems by providing an extra sodium resource to compensate for the initial capacity loss. However, none of them have been applied at the industrial level due to poor kinetics and severe gas evolution. Hence, in this timely review, we reclassify the presodiation techniques based on their operating locations and charge compensation mechanisms, which could provide intuitive perspectives for practical assessment. Key evaluation factors including kinetic performance, gas evolution behavior, environmental stability, and cost are proposed and systematically analyzed. The corresponding optimization strategies and potential applications are provided, followed by the scientific and technical challenges and suggestions for future industrialization. We believe this review will promote the industrial development of presodiation techniques in the future. © 2025 American Chemical Society.

关键词： Sodium-ion batteries

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composite dispersants for the preparation of monodisperse spherical alumina with uniform particle size

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Ceramics International 2025年

作者： Ren, Junbo Huo, Mingda Liu, Pengbo Tan, Ying Li, Minghui Gao, Wei Sun, Xiaohong Guo, Ruisong Zhao, Xinqi School of Materials Science and Engineering State Key Laboratory of Precious Metal Functional Materials Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education Tianjin University Tianjin300072 China CMP Advanced Materials Co. Ltd Tianjin300459 China

Spherical α-alumina powder has been widely used in advanced alumina ceramics manufacturing due to its excellent sphericity, uniform particle size distribution and good dispersion. However, the small size and fast growth rate of α-alumina precursor particles lead to strong agglomeration during grain growth, making it difficult to obtain uniformly dispersed α-alumina particles with good sphericity. In this study, polyethylene glycol 2000 (PEG2000) and poly (ammonium acrylate) (PAA-NH4) were used as composite dispersants to decrease agglomeration during the preparation of alumina precursors. When the contents of PEG2000 and PAA-NH4 were 0.5 g L−1 and 0.06 g L−1 (S4), respectively, uniformly dispersed alumina precursor particles with good sphericity and a particle size of about 506 nm were obtained, and the morphology remained stable after calcination. After molding and sintering the calcined powders, alumina ceramics with superior mechanical properties were produced. Compared to commercial α-alumina ceramics, flexural strength is increased by approximately 28.9 %, while fracture toughness is increased by approximately 29.2 %. This study offers a new foundation for the development of high-performance alumina powders and ceramics, supporting their engineering applications. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Calcination

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Electrochemically and chemically in-situ interfacial protection layers towards stable and reversible Zn anodes

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science Bulletin 2025年第1期70卷 104-124页

作者： Yuqing Yang Liping Qin Qiong He Chengjie Yin Yongpeng Lei Shuquan Liang Guozhao Fang School of Materials Science and Engineering Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan ProvinceCentral South UniversityChangsha 410083China College of Biological and Chemical Engineering Guangxi University of Science and TechnologyNanning 545006China School of Chemical and Blasting Engineering Anhui University of Science and TechnologyHuainan 232001China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China National Energy Metal Resources and New Materials Key Laboratory Central South UniversityChangsha 410083China

Aqueous zinc metal batteries(AZMBs)have received widespread attention for large-scale sustainable energy storage due to their low toxicity,safety,***,the technology and industrialization of AZMBs are greatly plagued by issues of Zn anode such as persistent dendrites and parasitic side reactions,resulting in rapid capacity degradation or battery *** or chemically in-situ interfacial protection layers have very good self-adaption features for stability and reversibility of Zn anodes,which can also be well matched to current battery ***,the in-situ interfacial strategies are far from the practical design for effective Zn ***,a targeted academic discussion that serves the development of this field is very ***,the comprehensive insights on electrochemically and chemically in-situ interfacial protection layers for Zn anode were proposed in this *** showcased a systematic summary of research advances,followed by detailed discussions on electrochemically and chemically in-situ interfacial protection *** importantly,several crucial issues facing in-situ interfacial protection strategies have been further put *** final section particularly highlighted a systematic and rigorous scheme for precise designing highly stable and reversible in-situ interface for practical zinc anodes.

关键词： In-situ strategy Interfacial layer Zn anode Solid electrolyte interphase Aqueous zinc metal batteries

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Integrated design of novel composite plate-truss hybrid lattice structures for superior energy absorption

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International Journal of Solids and Structures 2025年 318卷

作者： Wang, Xun Xiong, Jian Center for Composite Materials and Structures Harbin Institute of Technology Harbin150001 China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin150080 China

Conventional truss lattice structures are prone to stress concentration and shear banding under crushing loads, while plate lattice structures suffer from limited mechanical improvement due to narrow crushing spaces and manufacturing defects. A novel composite plate-truss hybrid lattice structure inspired by deep-sea glass sponges addresses these limitations by combining the lightweight performance of truss structures with the robust mechanical properties of plate-lattice structures. It can achieve a high energy absorption capacity by adjusting its geometric parameters. The powerful 3D printing technology of Multi Jet Fusion verified the feasibility of the novel composite square plate-truss hybrid structural design. The theoretical prediction model of the mean crush force of square plate-truss hybrid structure composite was established. Quasi-static compression tests and impact tests confirmed the accuracy of finite element results, while the deformation failure modes and mechanical responses of the new structure were analyzed. Compared to typical lattice structures, the novel composite square plate-truss hybrid structure demonstrates a larger effective crushing region, more stable mechanical response, and superior energy absorption characteristics. The impact of different geometric parameters on the mechanical properties of the proposed structure is discussed through parametric analysis, highlighting the significant influence of wall thickness on bearing and energy absorption characteristics. Furthermore, medium and low-speed impact loads were studied to assess the structural deformation characteristics, mechanical properties, and energy absorption. The results prove the reliability of the design method and show the deformation and energy absorption characteristics of different hybrid structures under different impact velocities. The bionic hybrid design strategy proposed in this study provides a promising way to significantly improve the mechanical properties of l

关键词： Crystal lattices

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边缘电子态调制实现效率超过15%的锡基钙钛矿太阳电池（英文）

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science China Materials 2025年第5期68卷 1462-1471页

作者：左晨刘庚灵刘聪龚安稳陈凯钟杨徐鑫熊文涛狄大卫胡笑添刘焘谈利承邹炳锁陈义旺 State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures School of ResourcesEnvironment and MaterialsGuangxi University Key Laboratory of Bioinorganic and Synthetic Chemistry (Mo 5 Lehn Institute of Functional MaterialsSchool of ChemistrySun Yat-sen University Institute of Polymers and Energy Chemistry (IPEC)/Film Energy Chemistry for Jiangxi Provincial Key Laboratory (FEC) Nanchang University DGUT-CNAM Institute Dongguan University of Technology State Key Laboratory of Extreme Photonics and Instrumentation College of Optical Science and EngineeringInternational Research Center for Advanced PhotonicsZhejiang University

锡基钙钛矿的严重p型掺杂效应和本征缺陷极大地限制了锡基钙钛矿太阳电池（PSCs）器件性能.本研究提出了一种新型n型有机小分子掺杂剂, NDI2HD-Br2,以缓解锡基钙钛矿的严重p型自掺杂并钝化锡相关缺陷. NDI2HD-Br2中具有高电子密度的羰基... 详细信息

锡基钙钛矿的严重p型掺杂效应和本征缺陷极大地限制了锡基钙钛矿太阳电池（PSCs）器件性能.本研究提出了一种新型n型有机小分子掺杂剂, NDI2HD-Br2,以缓解锡基钙钛矿的严重p型自掺杂并钝化锡相关缺陷. NDI2HD-Br2中具有高电子密度的羰基（C=O）可以向钙钛矿带边提供额外的电子,从而将锡基钙钛矿从p型转化为弱n型半导体（费米能级上移0.15 eV）.通过这种方法,锡基PSCs的功率转换效率（PCE）达到15.01%,开路电压高达0.95 V.此外,掺入NDI2HD-Br2的器件具有出色的长期稳定性,在氮气环境中存储1500小时后仍能保持81%的初始PCE.这项研究为调控锡基钙钛矿的电子结构并钝化其本征缺陷以实现高效稳定的太阳能电池提供了一条新途径.

关键词： perovskite solar cells tin electron transfer defects weak n-type

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Multispectral‐Responsive MXene Nanolayer Energy‐Saving Windows for High‐Absorption Electromagnetic Interference Shielding

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Nano Energy 2025年 141卷

作者： Jin, Meng Zhou, Xinfeng Qi, Cheng-Zhang He, Ping Ye, Lvxuan Min, Peng Yu, Zhong-Zhen Zhang, Hao-Bin State Key Laboratory of Organic-Inorganic Composites College of Materials Science and Engineering Beijing University of Chemical Technology Beijing100029 China Beijing Key Laboratory of Advanced Functional Polymer Composites Beijing University of Chemical Technology Beijing100029 China

Traditional glass windows, as channels for light, information, and heat exchange, are potential breaches for electromagnetic radiation and temperature regulation. However, materials simultaneously possessing both transparent, high-absorption electromagnetic interference (EMI) shielding and thermal management performances remain scarce. The narrow-band and unstable spectral responses of available transparent materials are the fundamental obstacles. To address these issues, we theoretically unveil the visible opacity (6.9 %/monolayer), high near-infrared transmittance (>80 %) of the Ti3C2Tx MXene nanolayer, and its stable ultra-wideband spectral response across the long-wave infrared, terahertz, and microwave regions. The unique optical characteristics make it possible to regulate multispectral radiation by constructing a radiative regulation (RR) window. Significantly, perfect electromagnetic absorption (≥99 %) and high average absorption (>90 %) are realized for RR windows with excellent EMI shielding and transparency, and the effective absorption region is tunable in the GHz-THz region. Meanwhile, the radiation-transparent MXene nanolayer and infrared-emissive design in the RR window help realize radiative cooling function to avoid heat accumulation, giving an energy-saving performance of 302.4 MJ m−2. This work will open the way to developing a new generation of cross-band technologies for multispectral manipulation. © 2025

关键词： Electromagnetic pulse

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Long-term oxidation resistance of a Ti65 alloy with Cr 2 AlC coating by magnetron sputtering

Corrosion Communications

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Corrosion Communications 2025年 18卷 66-75页

作者： Ke Ma Yang Li Jingjing Li Jinming Wang Jingjun Xu Jun Zuo Meishuan Li Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China School of Materials Science and Engineering University of Science and Technology of China Hefei 230026 China School of Materials Science and Engineering Shenyang Ligong University Shenyang 110159 China Science and Technology on Advanced Functional Composites Laboratory Aerospace Research Institute of Material and Processing Technology Beijing 100076 China

In this study, novel high-quality Cr 2 AlC coating was fabricated on Ti65 alloy substrate as its protective oxidation resistance coating. Isothermal oxidation tests were performed at 650 and 750 °C for up to 400 h in air. The results indicated that Ti65 alloy underwent severe oxidation at 750 °C, accompanied by the presence of the cracking and exfoliating of the oxide scale during oxidation. Compared to the bare Ti65 substrate, the coated samples revealed more excellent oxidation resistance, meeting the parabolic law with low oxidation rate constants of 8.70×10 −13 kg 2 ·m −4 ·s −1 at 650 °C and 2.80×10 −13 kg 2 ·m −4 ·s −1 at 750 °C. At the surface, Al preferentially oxidized to form the protective Al 2 O 3 layer and synchronously Cr 7 C 3 sublayer, retarding the inward diffusion of oxygen and presenting excellent oxidation resistance. Besides, at the coating/substrate interface, Al diffused from Cr 2 AlC coating into the substrate to form an Al-rich layer in substrate adjacent to the coating/substrate interface. Due to the Al consumption, Cr-carbide and nitride, as well as TiN, were thereby formed at the interface reaction layer, which could act as a barrier for the interdiffusion process.

关键词： Ti65 titanium alloy Cr 2 AlC coating Oxidation behaviors Interface reaction Oxidation mechanism

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A novel, green method for the preparation of biodegradable PLA membranes without pore-forming agent

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Journal of Water Process Engineering 2025年 74卷

作者： Cai, Jiayi Han, Zunbo Sun, Yinjie Chen, Haoran Li, Haoran Wang, Ruoxi Ji, Yanhong He, Benqiao State Key Laboratory of Separation Membranes and Membrane Processes School of Material Science and Engineering Tiangong University Tianjin 300387 China Cangzhou Institute of Tiangong University Cangzhou 061000 China Science and Technology on Advanced Functional Composite laboratory Aerospace Research Institute of Materials & Processing Technology Beijing 100076 China

Polylactic acid (PLA) membranes have attracted significant attention in separation technologies due to their biodegradable properties. This study proposes a novel and eco-friendly pore-forming strategy for fabricating PLA membranes by triggering the in situ reaction between CaCO₃ nanoparticles and citric acid during the phase inversion process. Unlike conventional methods requiring synthetic pore-forming additives, this approach leverages the sacrificial role of CaCO₃ and the reaction-generated CO₂ nanobubble to synergistically construct a porous structure. The overall porosity increases from 70.2 % (pristine PLA membrane, M0) to 85.6 % (membrane prepared from a 6 wt% CaCO₃-containing casting solution, M6), while pure water flux rises dramatically from 20.1 L·m⁻²·h⁻¹ to 218.3 L·m⁻²·h⁻¹, with bovine serum albumin rejection maintained at 96.8 %. Furthermore, the flux recovery rate improves from 53.2 % (M0) to 71.2 % (M6), demonstrating enhanced antifouling properties. This entirely green fabrication process, employing only natural CaCO₃ and citric acid, represents a significant advancement in sustainable membrane technology and provides a viable route for developing high-performance biodegradable separation membranes. © 2025 Elsevier Ltd

关键词： Biodegradable membrane CaCO3 nanoparticles Citric acid Polylactic acid

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