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Microstructure and mechanical properties of high-pressure sintered B_(6)O-SiC nanocomposites

Journal of materials science & Technology 2025年第1期204卷 238-244页

作者： Bin Zhang Rongxin Sun Pan Ying Song Zhao Yitong Zou Lei Sun Zihe Li Yufei Gao Mengdong Ma Lingyu Liu Chao Liu Bo Xu Center for High Pressure Science(CHiPS) State Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdao 066004China National Key Laboratory of Advanced Casting Technologies MIIT Key Laboratory of Advanced Metallic and Intermetallic Materials TechnologyEngineering Research Center of Materials Behavior and DesignMinistry of Education Nanjing University of Science and TechnologyNanjing 210094China Key Laboratory of Materials and Surface Technology(Ministry of Education) School of Materials Science and EngineeringXihua UniversityChengdu 610039China School of Materials Science and Engineering Faculty of Materials Metallurgy and ChemistryJiangxi University of Science and TechnologyGanzhou 341000China

Boron suboxide(B_(6)O)is recognized as a superhard material with a low mass density,high resistance to chemical wear,and excellent wear *** its desirable properties,the limited fracture tough-ness of B_(6)O restricts its application in industrial *** study presents the structural and me-chanical characterization of B_(6)O-SiC nanocomposites,which were synthesized via a high-pressure high-temperature sintering process of B_(6)O powders and SiC *** sintering process induced fragmen-tation of SiC whiskers,resulting in the homogenous distribution of SiC fragments within the B_(6)O *** increase in SiC content was observed to decrease the composite’s hardness,while initially reducing then enhancing its *** nanocomposites containing 20 wt%and 30 wt%SiC whiskers exhibited significant improvements in fracture toughness,averaging 6.5 MPa m^(1/2)and 7.0 MPa m^(1/2),respectively-approximately threefold the toughness of polycrystalline B_(6)O-while sustaining high hardness values of 36.3 GPa and 35.6 GPa on *** analyses revealed that the composites’superior me-chanical performance is due to the presence of strong grain boundaries,as well as a high density of nan-otwins and stacking *** findings demonstrate a viable method for producing B_(6)O-based nanocom-posites with enhanced hardness and toughness,potentially expanding their industrial applicability.

关键词： B_(6)O Ceramic nanocomposite Mechanical properties Microstructure

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Pinewood biochar antistatic polymer composites:an investigation of electrical,mechanical,rheological and thermal properties

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International Journal of Smart and Nano materials 2024年第4期15卷 767-785页

作者： Justin George Sergejs Gaidukovs Debes Bhattacharyya Centre for Advanced Materials Manufacturing and Design Faculty of EngineeringThe University of AucklandAucklandNew Zealand Carbon Research Centre Carbon Dot LimitedAucklandNew Zealand Institute of Polymer Materials Faculty of Materials Science and Applied ChemistryRiga Technical UniversityRigaLatvia

This study investigates the practical applications of biochar as an innovative and sustainable conductive filler in composite *** the conventional melt-blending method,we prepared conductive pinewood biochar-filled poly(lactic acid)/poly(butylene adipate-co-terephthalate)(PLA/PBAT)composites and systematically examined their electrical,mechanical,rheological and thermal *** results reveal a significant enhancement of electrical and mechanical properties upon the inclusion of conductive pinewood biochar in the PLA/PBAT *** the addition of 10 wt%of conductive pinewood biochar,the average surface resistivity of the composites decreased by three orders of magnitude,measuring 4.86×10^(10)Ω=sq,which meets the antistatic requirements for polymer ***,the average tensile strength of the biochar filler composites improved by 53% with an addition of just 1 wt% of biochar.

关键词： Biochar pyrolysis melt-blending polymer composites antistatic

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Multimodal element(including lithium)mapping in a Mg-9Li-4Al-1Zn alloy

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Journal of Magnesium and Alloys 2024年第11期12卷 4468-4480页

作者： Yu Zhang Yang Liu Zhuoran Zeng Nick Birbilis Philip N.H.Nakashima Laure Bourgeois Department of Materials Science and Engineering Monash UniversityVIC 3800Australia Monash Centre for Electron Microscopy Monash UniversityVIC 3800Australia College of Materials Science and Engineering Hunan UniversityChangsha 410082China State Key Laboratory of Advanced Design and Manufacturing Technology for Vehicle Hunan UniversityChangsha 410082China Suzhou Research Institute of Hunan University Suzhou 215131China Faculty of Science Engineering and Built EnvironmentDeakin UniversityVIC 3125Australia

Determining the distribution of alloying elements,particularly lithium,is crucial for a holistic understanding of magnesium-lithium-based *** this work,a bespoke ratio spectrum-imaging method based on electron energy-loss spectroscopy,in combination with time-of-flight secondary ion mass spectrometry,energy-dispersive X-ray spectroscopy and Z-contrast imaging,was applied to an as-rolled LAZ941 alloy(Mg-9Li-4Al-1Zn in wt.%).This was done to characterize the distribution of alloying elements,including the distribution of solute in the magnesium *** applications of different mapping techniques revealed that precipitates with two different morphologies are rich in Li,Al and Zn,compared to their surrounding ***,it was confirmed that theβ-phase of the alloy contains higher Li and lower Mg concentrations when compared to theα-*** study demonstrated the effectiveness and accuracy of the ratio spectrum-imaging method for mapping the elemental distribution(including lithium)in a range of Li-containing materials.

关键词： Magnesium alloys Lithium distribution mapping Solute content mapping Phase determination Electron energy-loss spectroscopy(EELS) Time-of-flight secondary ion mass spectrometry(ToF-SIMS) Scanning transmission electron microscopy(STEM)

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Reversible solid-liquid conversion enabled by self-capture effect for stable non-flow zinc-bromine batteries

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Green Energy & Environment 2024年第6期9卷 1035-1044页

作者： Xixi Zhang Xiaoke Wang Guangmeng Qu Tairan Wang Xiliang Zhao Jun Fan Cuiping Han Xijin Xu Chunyi Zhi Hongfei Li School of Physics and Technology University of JinanShandong250022China Songshan Lake Materials Laboratory DongguanGuangdong523808China Department of Materials Science and Engineering City University of Hong Kong83 Tat Chee AvenueHong KongChina Faculty of Materials Science and Engineering and Low Dimensional Energy Materials Research Center Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenGuangdong518055China School of System Design and Intelligent Manufacturing Southern University of Science and TechnologyShenzhenGuangdong518055China

Non-flow aqueous zinc-bromine batteries without auxiliary components(e.g.,pumps,pipes,storage tanks)and ion-selective membranes represent a cost-effective and promising technology for large-scale energy ***,they generally suffer from serious diffusion and shuttle of polybromide(Br^(-),Br^(3-))due to the weak physical adsorption between soluble polybromide and host carbon materials,which results in low energy efficiency and poor cycling ***,we develop a novel self-capture organic bromine material(1,10-bis[3-(trimethylammonio)propyl]-4,4'-bipyridinium bromine,NVBr4)to successfully realize reversible solid complexation of bromide components for stable non-flow zinc-bromine battery *** quaternary ammonium groups(NV^(4+)ions)can effectively capture the soluble polybromide species based on strong chemical interaction and realize reversible solid complexation confined within the porous electrodes,which transforms the conventional“liquid-liquid”conversion of soluble bromide components into“liquid-solid”model and effectively suppresses the shuttle ***,the developed non-flow zinc-bromide battery provides an outstanding voltage platform at 1.7 V with a notable specific capacity of 325 mAh g^(-1)NVBr4(1 A g^(-1)),excellent rate capability(200 mAh g^(-1)NVBr4 at 20 A g^(-1)),outstanding energy density of 469.6 Wh kg^(-1)and super-stable cycle life(20,000 cycles with 100%Coulombic efficiency),which outperforms most of reported zinc-halogen *** mechanism analysis and DFT calculations demonstrate that the chemical interaction of quaternary ammonium groups and bromide species is the main reason for suppressing the shuttle *** developed strategy can be extended to other halogen batteries to obtain stable charge storage.

关键词： Solid-liquid conversion Self-capture Non-ﬂow zinc-bromine batteries Quaternary ammonium

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Ti-Al-Ni-Cu-Si alloy exhibiting low flow stress, high ductility at high temperature and high strengthening at room temperature

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Keikinzoku/Journal of Japan Institute of Light Metals 2025年第3期75卷 156-165页

作者： Higaki, Minori Matsumoto, Hiroaki Graduate student Graduate school Division of science for creative emergence Kagawa University 2217-20 Hayashi-cho Kagawa Takamatsu-shi761-0396 Japan Department of Advanced Materials Science Faculty of Engineering and Design Kagawa University Kagawa Takamatsu-shi Japan

The microstructure and mechanical properties of Ti-Al-Ni-Cu-Si alloys were evaluated, and the effects of the addition of Ni, Cu, and Si were investigated. Microstructural analysis revealed that the alloy consists of two phases: the α phase and the eutectoid phase, with the precipitation of Ti2 (Ni, Cu) as an intermetallic compound (which is identified by SEM and TEM analyses). Tensile tests tested at various temperatures ranging from room temperature to 700°C showed that the Ti-Al-Ni-Cu-Si alloys such as Ti-3Al-0.5Ni-0.5Cu and Ti-3Al-0.5Ni-0.5Cu-0.3Si alloys (in mass%) exhibit a higher strength at room and intermediate temperatures (〜500°C), and a lower stress at high temperatures (≥ 600°C) compared to conventional Ti-Al-V alloys having similar β phase stability. The results obtained in this study successfully suggest a new type of V-free Ti alloy with high strength from room temperature to 500°C and improved hot working ability (a low flow stress and a high elongation). © 2025 The Japan Institute of Light Metals.

关键词： Titanium alloys

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Synergistic enhancement of cathode/anode interfaces with high water-retentive organohydrogel enabling highly stable zinc ion batteries

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Journal of Energy Chemistry 2024年第11期98卷 670-679页

作者： Xixi Zhang Qingxiu Yu Guangmeng Qu Xiaoke Wang Chuanlin Li Chenggang Wang Na Li Jinzhao Huang Cuiping Han Hongfei Li Xijin Xu School of Physics and Technology University of JinanJinan 250022ShandongChina School of Chemistry and Chemical Engineering Shandong UniversityJinan 250100ShandongChina Faculty of Materials Science and Engineering and Low Dimensional Energy Materials Research Center Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055GuangdongChina School of System Design and Intelligent Manufacturing Southern University of Science and TechnologyShenzhen 518055GuangdongChina

Current aqueous battery electrolytes,including conve ntional hydrogel electrolytes,exhibit unsatisfactory water retention *** sustained water loss will lead to subsequent polarization and increased internal resistance,ultimately resulting in battery ***,a double network(DN) orga no hydrogel electrolyte based on dimethyl sulfoxide(DMSO)/H_(2)O binary solvent was *** directionally reconstructing hydrogen bonds and reducing active H_(2)O molecules,the water retention ability and cathode/anode interfaces were synergistic *** a result,the synthesized DN organohydrogel demonstrates exceptional water retention capabilities,retaining approximately 75% of its original weight even after the exposure to air for 20 *** Zn MnO_(2) battery delivers an outstanding specific capacity of275 mA h g^(-1) at 1 C,impressive rate performance with 85 mA h g^(-1) at 30 C,and excellent cyclic stability(95% retention after 6000 cycles at 5 C).Zn‖Zn symmetric battery can cycle more than 5000 h at 1 mA cm^(-2) and 1 mA h cm^(-2) without short *** study will encourage the further development of functional organohydrogel electrolytes for advanced energy storage devices.

关键词： Enhanced water-retentive Organohydrogel electrolyte Stable Zn||MnO+2 batteries Enhancement of cathode/anode interfaces

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Nitrogen-doping assisted local chemical heterogeneity and mechanical properties in CoCrMoW alloys manufactured via laser powder bed fusion

Advanced Powder Materials

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advanced Powder materials 2024年第5期3卷 46-57页

作者： Wenting Jiang Ruidi Li Junyang He Song Ni Li Wang Zibin Chen Yi Huang Caiju Li Jianhong Yi Min Song State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China College of Materials and Advanced Manufacturing Hunan University of TechnologyZhuzhou 412007China Research Institute for Advanced Manufacturing Department of Industrial and Systems EngineeringThe Hong Kong Polytechnic UniversityHong KongChina Department of Design and Engineering Faculty of Science and TechnologyBournemouth UniversityPooleDorsetBH125BBUK Materials Research Group Department of Mechanical EngineeringUniversity of SouthamptonSouthamptonSO171BJUK Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093China

CoCrMoW alloys with different nitrogen(N)additions(0,0.05,0.1,and 0.2 wt%)were prepared via laser powder bed fusion(LPBF).The effects of N content on the microstructure and mechanical properties were *** results indicate that the LPBFed CoCrMoW alloy with 0.1 wt%N addition(0.1 N alloy)shows the best combination of mechanical properties with a yield strength of~983 MPa and an elongation of~19%.Both the LPBF process and the N addition impose great effects on suppressing theγtoεmartensitic transformation,resulting in a decrease in the width and amount ofεlaths/stacking ***,the N addition promotes the segregation of elements Mo,W,and Si along the cellular sub-grain boundaries(CBs),forming fine and discontinuous precipitates rich in Mo,W and Si along the CBs in the 0.1 N alloy,but dense and continuous(Mo,W)5Si_(3)precipitates along the CBs in the 0.2 N ***(Mo,W)5Si_(3)precipitates with a tetragonal structure were observed and characterized for the first time in the Co-Cr based *** negative mixing enthalpy between the non-metallic elements N,Si and the metallic elements Mo,W,Cr,and the rapid solidification induced segregation of high melting point elements such as Mo and W along CBs during LPBF process,synergistically contribute to the chemical heterogeneity in the *** pure FCC matrix,the slightly increased segregation of Mo,W,Si elements and fine precipitates along the CBs contribute to the good combination of strength and elongation of the 0.1 N ***,though pure FCC phase was present in the 0.2 N alloy,the dense and continuous(Mo,W)5Si_(3)precipitates along CBs acted as nucleation sites for cracks,deteriorating the elongation of the ***,it is possible to tune the mechanical properties of the LPBFed CoCrMoW alloy by adjusting the local chemical heterogeneity.

关键词： CoCrMoW alloy Laser powder bed fusion Nitrogen addition Mechanical properties Precipitation behaviors

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Machine Learning-Based Prediction of Corrosion Inhibition Efficiency of Expired Pharmaceuticals: Model Development and Application

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Journal of Bio- and Tribo-Corrosion 2025年第1期11卷 1-12页

作者： Putra, Dzaki Asari Surya Ardyansyah, Nibras Bahy Putranto, Nicholaus Verdhy Trisnapradika, Gustina Alfa Akrom, Muhamad Rustad, Supriadi Dipojono, Hermawan Kresno Maezono, Ryo Faculty of Computer Science Study Program in Informatics Engineering Universitas Dian Nuswantoro Semarang50131 Indonesia Research Center for Materials Informatics Faculty of Computer Science Universitas Dian Nuswantoro Semarang50131 Indonesia Quantum and Nano Technologies Research Group Faculty of Industrial Technology Institut Teknologi Bandung Bandung40132 Indonesia School of Information Science Japan Advanced Institute of Science and Technology Ishikawa923-1292 Japan

Corrosion poses a significant challenge in industries due to material degradation and high maintenance costs, making effective inhibitors essential. Recent studies suggest expired pharmaceuticals as alternative corrosion inhibitors, but identifying the most efficient compounds can be time-consuming. This study applies machine learning models, particularly Gradient Boosting Regressor (GBR), to predict corrosion inhibition efficiency (CIE). The developed model is integrated into a web-based application, enabling real-time, accurate CIE predictions. Results show GBR as the more precise model for predicting CIE, with low error rates. The streamlit-based web application offers a user-friendly platform, facilitating quick identification of suitable inhibitors. It is flexible, supporting analysis beyond corrosion inhibitors, and significantly enhances the efficiency of the evaluation process. © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2025.

关键词： Adversarial machine learning

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Effects of friction stir processing and nano-hydroxyapatite on the microstructure,hardness,degradation rate and in-vitro bioactivity of WE43 alloy for biomedical applications

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Journal of Magnesium and Alloys 2024年第1期12卷 209-224页

作者： Bo Wu Farazila Yusof Fuguo Li Huan Miao A.R.Bushroa Mohd Ridha Bin Muhamad Irfan Anjum Badruddin Mahmoud Z.Ibrahim Department of Mechanical Engineering Faculty of EngineeringUniversiti MalayaKuala Lumpur 50603Malaysia Centre of Advanced Manufacturing and Material Processing(AMMP Centre) Universiti MalayaKuala Lumpur 50603Malaysia Center of Foundation studies in Science Universiti MalayaKuala Lumpur 50603Malaysia State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Mechanical Engineering Department College of EngineeringKing Khalid UniversityAbha 61421Saudi Arabia Design and Production Engineering Faculty of EngineeringAin Shams UniversityCairo 11517Egypt

Nowadays,magnesium alloys are emerging in biomedical implants for their similar properties to natural ***,the rapid degradation of magnesium alloys in biological media hinders successful *** of microstructure,as well as reinforcement particles can significantly improve the degradation *** this work,multi-pass friction stir processing(FSP)was proposed to synthesize WE43/nano-hydroxyapatite(n HA)surface composite,the microstructure,reinforced particle distribution,micro-hardness,corrosion behavior and in-vitro bioactivity were *** subsequent FSP passes of WE43 alloy and WE43/n HA composite refined the grain size which was reduced by 94.29%and 95.92%(2.63 and 1.88μm,respectively)compared to base metal after three *** resulted in increasing the microhardness by 120%(90.86 HV0.1)and 135%(105.59 HV0.1)for the WE43 and WE43-n HA,*** is found that increasing FSP passes improved the uniform distribution of n HA particles within the composite matrix which led to improved corrosion resistance and less degradation *** corrosion rate of the FSPed WE43/n HA composite after three passes was reduced by 38.2%(4.13 mm/year)and the degradation rate was reduced by 69.7%(2.87 mm/y).This is attributed to secondary phase(Mg24Y5and Mg41Nd5)particle fragmentation and redistribution,as well as a homogeneous distribution of n ***,the growing Ca-P and Mg(OH)2layer formed on the surface represented a protective layer that reduced the degradation *** wettability test revealed a relatively hydrophilic surface with water contact angle of 49.1±2.2°compared to 71.2±2.1°for base ***,biomineralization test showed that apatite layer grew after immersion 7d in simulated body fluid with atomic ratio of Ca/P 1.60 approaching the stoichiometric ratio(1.67)indicating superior bioactivity of FSPed WE43/n HA composite after three *** results raise that the grain refinement by FSP and introduction of n HA partic

关键词： Friction stir processing Magnesium-based composite Nano-hydroxyapatite Corrosion behavior In-vitro bioactivity

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3D/4D additive-subtractive manufacturing of heterogeneous ceramics

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Journal of materials science & Technology 2024年第34期201卷 210-221页

作者： Guo Liu Xinya Lu Xiaofeng Zhang Yan Zhao Shenghui Yi Jingjun Xu Yuqi Zhan Jianan Yin Chengcheng Feng Zhifeng Zhou Peiyu Wang Zhou Chen Yunhu He Siyao Chen Pengchao Liu Jun Zuo Yu Dai Jian Wu Sida Liu Jian Lu Centre for Advanced Structural Materials City University of Hong Kong Shenzhen Research InstituteGreater Bay Joint DivisionShenyang National Laboratory for Materials ScienceShenzhen 518057China CityU-Shenzhen Futian Research Institute Shenzhen 518045China Hong Kong Branch of National Precious Metals Material Engineering Research Center City University of Hong KongHong Kong 999077China Department of Mechanical Engineering City University of Hong KongHong Kong 999077China Department of Materials Science and Engineering City University of Hong KongHong Kong 999077China National Engineering Laboratory for Modern Materials Surface Engineering Technology&The Key Lab of Guangdong for Modern Surface Engineering Technology Institute of New MaterialsGuangdong Academy of ScienceGuangzhou 510650China State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body College of Mechanical and Vehicle EngineeringHunan UniversityChangsha 410082China Faculty of Materials Science Shenzhen MSU-BIT UniversityShenzhen 518100China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Physics and Materials Nanchang UniversityNanchang 330031China

The manufacturing of heterogeneous high-temperature material components is challenging for use in practical ***-dimensional(3D)printing provides solutions to programmable constructing ceramic ***,the development of heterogeneous ceramics is limited by low flexibil-ity of heterogeneity,geometrical complexity,structural resolution,manufacturing efficiency,and mate-rial *** this study,we demonstrated flexible and rapid approaches for fabricating complicated and precise heterogeneous ceramics by shape-changing(4D)or shape-keeping(3D)additive-subtractive manufacturing(ASM)*** shape-changing strategy for heterogeneous ceramics was achieved by global ceramization of heterogeneous precursors,while the shape-keeping strategy for heterogeneous ceramics was achieved by local receramization of homogeneous *** element analysis(FEA)simulations of the influence of the thermal shrinkage dominant in the shape-changing strategy on the shape deformation of heterogeneous ceramics could be valuable predictions of the experimental *** 3D/4D ASM methods are generic for high-temperature materials and extendable to metallic and dia-mond materials.

关键词： 3D/4D printing Additive-subtractive manufacturing Heterogeneous ceramics Elastomer-derived ceramics Local receramization

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