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Structure and mechanical properties of 3D printed biomimetic multi-tubular carbon fiber composites

Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica 2025年第5期42卷 2557-2567页

作者： Yang, Fanghong Fu, Yunchen Zhong, Jiaming Zhang, Daijun Xin, Zhonghua Guan, Bowen Wang, Chengbo Ye, Lu Huang, Wei AECC Beijing Institute of Aeronautical Materials Beijing100095 China National Key Laboratory of Advanced Composites Beijing100095 China School of Materials Science and Engineering Huazhong University of Science and Technology Hubei430074 China

Inspired by energy absorbent natural tubular biological structures, a bionic multi-tubular carbon fiber composite was designed. This bionic material was fabricated using 3D printing and UV curing, incorporating heterogeneous interfaces to significantly enhance toughness and impact resistance. Experimental results demonstrate that the bionic structure material exhibits an extended yield phase and exceptional deformation recovery in static compression tests, with the specific energy absorption of 44.6 J/g and specific strength of 130.6 MPa/(g·cm–3). In three-point bending tests, the material shows a prolonged plastic deformation region. The fracture toughness is 1.54 times compared to carbon fiber composite. For impact tests, it effectively absorbs energy with restricted crack propagation, and the destruction of heterogeneous interface. This study provides biomimetic insights for the design of impact-resistant composite materials. © 2025 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved.

关键词： Carbon fibers

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Effect of Morphology Structures on Hydrogen Evolution Reaction and Oxygen Evolution Reaction Performances of Mo_(2)CO_(2)MXene

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Chinese Journal of Chemical Physics 2025年第2期38卷 199-211,I0040页

作者： Mengyue Li Yuwen Cheng Cuiping Shao Yongtao Li School of Materials Science and Engineering Anhui University of TechnologyMaanshan 243002China Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials Ministry of EducationAnhui University of TechnologyMaanshan 243002China

Currently,single atom(SA),quantum dots(QDs)and heterogeneous interfaces have been extensively em-ployed for the design of nov-el catalysts for overall water ***,there are still few literatures about the hydrogen(HER)and oxygen(OER)evolution perfor-mances for three different morphologies of the same metal loaded on MXenes ***,the HER and OER per-formances of Mo_(2)CO_(2)modified by transition metals(TM,TM=Fe,Co,and Ni)with differ-ent SA loading(STM/Mo_(2)CO_(2)),QDs(QTM/Mo_(2)CO_(2))and heterogeneous interface(ITM/Mo_(2)CO_(2)),and TM loading and N3(TMN_(3)/Mo_(2)CO_(2))or N4 doping co-modification(TMN4/Mo_(2)CO_(2))are investigated by density functional theory(DFT)*** re-sults show that the HER and OER performances of STM/Mo_(2)CO_(2)are better than those of ITM/Mo_(2)CO_(2)and QTM/Mo_(2)CO_(2).Especially,SNi/Mo_(2)CO_(2)exhibits the best HER and OER properties among the studied structures,with the correspondingΔGH*andηOER of−0.04 eV and 0.53 V,*** is noteworthy that theΔGH*absolute value,ηOER,work function(Φ)and TM valence charges are significantly correlated,whereΔGH*absolute value,ηOER,andΦall present an increase trend following the order of STM/Mo_(2)CO_(2),ITM/Mo_(2)CO_(2),and QTM/Mo_(2)CO_(2),whereas TM valence charges exhibit a decrease trend with the above ***,integral crystal orbital Hamilton population(ICOHP)results indicate that the more negative the ICOHP,the stronger bonding strength between TM and H atoms,and the better the corresponding HER performance in STM/Mo_(2)CO_(2).Campared with SNi/Mo_(2)CO_(2),Ni loading and N3 doping co-modification Mo_(2)CO_(2)(NiN_(3)/Mo_(2)CO_(2))shows better HER(ΔGH*=−0.01 eV)and OER catalytic activities(ηOER=0.36 V).Molecular dynamics simula-tions results indicate that most of the modified systems are stable at reaction *** summary,NiN_(3)/Mo_(2)CO_(2)can be used as an efficient electrocatalyst for overall water splitting.

关键词： Single-atom catalysts Quantum dot Heterogeneous interface Density function-al theory Mo_(2)CO_(2)MXene

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Synergistic effects of precursor reduction and ion migration blocking result in highly sensitive MAPbI₃ X-ray detectors with a low detection limit

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Journal of Materials Chemistry C 2025年第10期13卷 5317-5325页

作者： Jiang, Long Xue, Chengzhi Cheng, Jiatian Li, Nan Fan, Xinyu Yang, Yuanbo Li, Tiantian Li, Liwei Liu, Yucheng Feng, Jiangshan Liu, Shengzhong Yang, Zhou State Key Laboratory of Oil and Gas Equipment CNPC Tubular Goods Research Institute Shaanxi Xi’an 710077 China Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 China Dalian Institute of Chemical Physics Chinese Academy of Sciences University of Chinese Academy of Sciences Dalian 116023 China Dalian National Laboratory for Clean Energy iChEM Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China

Lead halide perovskites have emerged as promising materials for sensitive, low-dose-rate X-ray imaging. However, the dark current drift caused by ion migration poses challenges to their long-term operational stability and performance. To address this issue, we explored the synergistic effects of precursor reduction and ion migration blocking. Reducing the precursor solution decreases the defect density, enhancing the carrier lifetime and mobility-lifetime product, thus boosting X-ray sensitivity. However, this approach alone does not effectively suppress dark current drift. By incorporating an ion migration blocker, the optimized device exhibits a significantly reduced dark current drift of 3.62 × 10⁻⁴ nA cm⁻¹ s⁻¹ V⁻¹, an improved X-ray sensitivity of 1.22 × 10⁵ μC Gy_air⁻¹ cm⁻² and a low detection limit of 3.93 nGy_air s⁻¹ under a 40 kV X-ray source and 12.66 V mm⁻¹ electrical field, positioning it among the best of polycrystalline perovskite X-ray detectors. Additionally, it can capture a clear X-ray image of a metal key at an X-ray dose of 2.85 μGy_air s⁻¹, highlighting its potential for low-dose X-ray imaging applications. © 2025 The Royal Society of Chemistry.

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Microstructure Evolution of Mechanically-Alloying and Its Subsequently-Annealed AlCrCu0.5Mo0.5Ni High-Entropy Alloy

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Jinshu Xuebao/Acta Metallurgica Sinica 2025年第5期61卷 731-743页

作者： Lei, Yunlong Yang, Kang Xin, Yue Jiang, Zitao Tong, Baohong Zhang, Shihong Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials Ministry of Education Anhui University of Technology Ma'anshan243000 China School of Mechanical Engineering Anhui University of Technology Ma'anshan243032 China

Boiler steel is prone to thermal corrosion and abrasion in high-temperature environments, making thermal spray protective coatings a vital solution for enhancing the corrosion and abrasion resistance of boilers. This study focuses on the development of a novel AlCrCu0.5Mo0.5Ni high-entropy alloy powder synthesized through mechanical alloying (MA) using monolithic metal powders as starting materials. The effects of milling time on the phase structure, grain size, and microstructure evolution of the MA powder were investigated. Phase characterization was performed using XRD;grain size, lattice strain, and lattice constant were measured;morphological and microstructural analyses were performed using SEM and TEM. Phase regulation through vacuum isothermal annealing techniques was also explored. The findings indicated the formation of two bcc (bcc1, bcc2) and one fcc solid solution phases within the high-entropy alloy powder. With increased milling time, the MA powder experienced plastic deformation, which led to a reduction in grain size and an augmentation of lattice strain. Powder particle fragmentation and refinement of the element-enriched zones facilitated enhanced diffusion and alloying of the elements. At 40 h of milling, the powder particles exhibited a more homogeneous elemental distribution, with phase contents of 41% bcc1, 37% bcc2, and 22% fcc, and an average particle size of 24 μm, making them suitable for thermal spray applications. Annealing at 800 oC led to the decomposition of the bcc2 solid solution structure after 40 h of ball milling. Upon increasing the annealing temperature to 1000 oC, complete decomposition of the bcc2 solid solution was observed, resulting in 68% bcc1 and 21% fcc phases, with the emergence of 11% CrMo phase. As the annealing temperature was increased, the MA powder released significant strain energy, increasing grain size and a reduction in lattice strain. The maximum hardness and elasticity modulus were achieved after annealing

关键词： Isothermal annealing

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Effects of Al₂O₃ Doping on Microstructure and Wear Behavior of Plasma-Sprayed CoCrAlTaY-Al₂O₃ Cermet Coatings

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Journal of Materials engineering and Performance 2025年 1-11页

作者： Lin, Yue Xue, Zhaolu Huang, Wen Zhang, Shihong Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials (Anhui University of Technology) Ministry of Education Maanshan 243002 China Surface Engineering Research Institute Chinese Academy of Agricultural Mechanization Sciences Beijing 100083 China

MCrAlY-based coatings are widely applied in metallurgy and aerospace engineering. In the present work, a CoCrAlTaY-Al2O3 spraying powder was prepared by spray granulation and vacuum sintering. Subsequently, (1-x) CoCr... 详细信息

MCrAlY-based coatings are widely applied in metallurgy and aerospace engineering. In the present work, a CoCrAlTaY-Al₂O₃ spraying powder was prepared by spray granulation and vacuum sintering. Subsequently, (1-x) CoCrAlTaY-xAl₂O₃ (x = 0, 10, 20, 30%, wt.%) cermet coatings were fabricated by atmospheric plasma spraying (APS) technology, and the effects of Al₂O₃ doping concentrations on the microstructure, phase composition, mechanical properties, and wear behavior of the cermet coatings were investigated. The results showed that most of the CoCrAlTaY-Al₂O₃ spraying powder particles were spherical with uniform composition and diameters ranging from 15 to 45 μm. The CoCrAlTaY-Al₂O₃ coating was relatively dense and contained few pores. Al₂O₃ doping had no significant effect on the phase composition of the coating that was mainly composed of Al₅Co₂, Cr, α-Al₂O₃, θ-Al₂O₃ and γ-Al₂O₃. As the content of Al₂O₃ increased, the Vickers hardness and porosity of the cermet coating gradually increased. The bonding strength of CoCrAlTaY coating decreased after adding Al₂O₃, and the coating with 30% doping Al₂O₃ had a maximum hardness of 758.3 HV_0.3 and a relatively high bonding strength of 48.7 MPa. The wear mechanism of the CoCrAlTaY-Al₂O₃ coating was mainly abrasive wear at room temperature, and the doping of Al₂O₃ reduced the amount of adhesive wear. Aa the Al₂O₃ doping content increased, the wear volume and wear rate of the grinding ball gradually increased, implying that the wear performance of the CoCrAlTaY-Al₂O₃ coating was significantly improved after adding Al₂O₃. © ASM Int

关键词： Al2O3 doping atmospheric plasma spraying CoCrAlTaY coating mechanical properties wear behavior

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Effect of extrusion ratio on microstructure and mechanical properties of AZ42 alloy sheet

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Transactions of Nonferrous Metals Society of China 2025年第4期35卷 1109-1121页

作者： Song-ke XIAO Xiao-jie ZHOU Gang ZENG Hong-chao XIAO Xin-kai KANG Xian-zheng LU Xiao-min CHEN Jian ZHANG Hunan Provincial Key Laboratory of Intelligent Manufacturing Technology for High-performance Mechanical Equipment Changsha University of Science and TechnologyChangsha 410114China Hunan Provincial Key Laboratory of Advanced Aerospace Materials CASIC(Changsha)Advanced Materials Institute Co.Ltd.Changsha 410221China Hunan Provincial Engineering Research Center of Wrought Magnesium Alloys and Surface Protection Changsha 410221China SJTU−Yibin Innovation Center for Advanced Materials Yibin 644002China

The microstructure and mechanical properties of Mg−4.5Al−2.5Zn−0.3Mn−0.2Ca(wt.%,designated as AZ42)alloys in extruded(at extrusion ratios of 28,20 and 11.5)and peak-aged states were investigated,by using optical microscopy,scanning electron microscopy,energy dispersive spectrometry and electron backscatter *** results show that extrusion produces a typical basal fiber texture and streamlines of second *** samples exhibit the lowest Schmid factor of basal slip(SFb)and the superior tensile yield strength(TYS)along extrusion direction(ED).The sample with extrusion ratio of 20 exhibits the largest average grain size,but the smallest SFb which compensates for the disadvantage of grain coarsening and maintains the *** being peak-aged at 175℃for 48 h,the sample with the extrusion ratio of 20 shows the optimal TYS along all the directions,compared to the other *** hopes to provide useful information for optimizing the deformation parameters of the AZ42 alloys.

关键词： AZ42 alloy extrusion ratio Schmid factor strength aging-hardening

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Mussel-inspired MXene-functionalized sponge for solar-driven water purification: Photothermal-driven crude oil absorption, solar steam generation, and photothermal sterilization

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Chemical engineering Journal 2025年 514卷

作者： Zhang, Jingwen Zhang, Xiangyi Mai, Bingjie Fu, Nuo Wang, Shuyu Shang, Bin Deng, Ziwei Key Laboratory of Applied Surface and Colloid Chemistry National Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi'an710119 China State Key Laboratory of New Textile Materials and Advanced Processing Technologies School of Materials Science and Engineering Wuhan Textile University Wuhan430200 China

Solar-driven water purification is recognized as an effective and sustainable technology for tackling the global water crisis by utilizing clean and renewable solar energy. In this study, we present a mussel-inspired MXene-functionalized sponge (denoted as POPM sponge), which features a 3D interconnected porous structure, enhanced surface hydrophobicity, and efficient photothermal conversion capabilities. The design and fabrication of the POPM sponge involve integrating mussel-inspired hydrophobic Ti3C2Tx MXene nanosheets with a 3D interconnected porous PDMS sponge as precursors. This POPM sponge shows considerable potential as a multifunctional photothermal material to promote solar-driven water purification in complex wastewater systems. With its superior surface hydrophobicity and high photothermal conversion efficiency, this POPM sponge effectively recovers high-viscosity crude oil spills through photothermal-driven absorption. Moreover, it functions as an efficient solar evaporator, exhibiting high water evaporation rates and remarkable photothermal conversion efficiencies, thereby facilitating cost-effective solar-driven water purification in complex wastewater systems. Additionally, it possesses remarkable photothermal antibacterial characteristics for the sterilization of common pathogenic bacteria in wastewater, indicating its potential as a promising photothermal material for sterilization applications in such environments. This strategy offers a pathway for the development of multifunctional photothermal materials aimed at enhancing the efficiency of solar-driven water purification in complex wastewater systems within practical applications. © 2025 Elsevier B.V.

关键词： Sterilization (cleaning)

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Angle-resolved magneto-chiral anisotropy in a non-centrosymmetric atomic layer superlattice

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Science Bulletin 2025年第9期70卷 1406-1409页

作者： Cheng, Long Bao, Mingrui Zhang, Xue Zhang, Jingxian Yang, Qun Li, Qiang Cao, Hui Qiu, Dawei Li, Hui Cheng, Guanglei Zhou, Hua Zuo, Jian-Min Zhou, Xiaodong Shen, Jian Zhu, Zhifeng Wang, Wenbo Zhai, Xiaofang School of Physical Science and Technology ShanghaiTech University Shanghai201210 China CAS Key Laboratory of Microscale Magnetic Resonance and School of Physical Sciences University of Science and Technology of China Hefei230026 China School of Information Science and Technology ShanghaiTech University Shanghai201210 China State Key Laboratory of Surface Physics and Institute for Nanoelectronic Devices and Quantum Computing Fudan University Shanghai200433 China X-ray Science Division Advanced Photon Source Argonne National Laboratory LemontIL60439 United States Institutes of Physical Science and Information Technology Anhui University Hefei230601 China Department of Materials Science and Engineering and Materials Research Laboratory University of Illinois Urbana–Champaign UrbanaIL61801 United States ShanghaiTech Laboratory for Topological Physics ShanghaiTech University Shanghai201210 China

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Current–Carrying Wear Characteristics of Al-Cu Alloys with Different Al-5Ti-B Additions

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Journal of Materials engineering and Performance 2025年 1-13页

作者： Zhang, Yongxin Zhao, Junwen Tao, Xingyu Xu, Lei Han, Jing Key Lab of Advanced Technologies of Materials (Ministry of Education) School of Materials Science and Engineering Southwest Jiaotong University Chengdu China Key Laboratory of Materials and Surface Technology (Ministry of Education) School of Materials Science and Engineering Xihua University Chengdu China

Al-15Cu alloys with varying grain refiner Al-5Ti-B contents were prepared in a resistance melting furnace and then processed into disc specimens (Φ60 × 5 mm) for test. Wear tests with an electric current density of 0-3.2 A mm-2 were conducted on these alloys paired with stainless steel using a self-designed pin-disc type electric current–carrying wear test stand, and the microstructure, hardness, conductivity, tensile strength, wear properties, and mechanisms of the modified Al-15Cu alloy were investigated. The results showed that Al-5Ti-B significantly refined the α-Al grains and dispersed the eutectic structure in the alloy, resulting in substantial improvements in both mechanical properties and electric conductivity. As the Al-5Ti-B content increased, the variation range of the electric current–carrying specific wear rate decreased, with a maximum reduction of 22.7% in the specific wear rate observed with the addition of 1.5% Al-5Ti-B. Additionally, the average wear track depth and maximum grind marks depth were reduced by up to 44.8% and 39%, respectively. The surface temperature was notably affected by the electric current, with a steady-state temperature increase of up to 81.3%. Furthermore, the Al-5Ti-B content also influenced the steady-state temperature, which increased by up to 17.3% with increasing Al-5Ti-B content. In addition, the introduction of Al-5Ti-B delayed the delamination wear of the Al-15Cu alloy in the absence of current, which was diminished when a contact electric current was applied.

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Vat photopolymerization of silica-based ceramic cores using high solid loading slurry with performance optimization

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China Foundry 2025年 1-10页

作者： Yang, Yong-kang Wang, Bo-ran Jia, Zi-qi Niu, Shu-xin Li, Xin Guo, Ya-jie Xu, Xi-qing School of Materials Science and Engineering Chang’an University Xi’an China School of Materials Science and Engineering Key Lab of Advanced Ceramics and Machining Technology of Ministry of Education Tianjin University Tianjin China Science and Technology on Advanced High Temperature Structural Materials Laboratory Beijing Institute of Aeronautical Materials Beijing China

Vat photopolymerization (VPP) 3D printing is an optimized technology for complex-shaped ceramic cores, in which the solid loading of ceramic slurries greatly influences the microstructure and property of the final ceramic parts. However, the high solid loading of slurries is highly limited by the high viscosity. In this study, silica-based ceramic core slurries with solid loading up to 68vol.% were achieved by the composition design to optimize the performance, considering the curing, rheological, and double bond conversion rate. The slurries demonstrate superior curing and rheological performance with mass ratio of monomers being 3:2 and mass fraction of BYK111 being 4wt.%. Afterwards, the impact of solid loading on the morphology and mechanical properties was investigated. As the solid loading increases, the microstructure becomes gradually dense, leading to an improved flexural strength of 19.5 MPa. Additionally, the sintering shrinkage becomes more uniform, satisfying the casting requirements effectively. This work serves as a guide for the preparation of ceramic slurries with a high solid loading.

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