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Understanding the creep behaviors and mechanisms of Mg-Gd-Zn alloys via machine learning

Journal of Magnesium and Alloys 2024年第8期12卷 3281-3291页

作者： Shuxia Ouyang Xiaobing Hu Qingfeng Wu Jeong Ah Lee Jae Heung Lee Chenjin Zhang Chunhui Wang Hyoung Seop Kim Guangyu Yang Wanqi Jie Graduate Institute of Ferrous and Eco Materials Technology(GIFT) Pohang University of Science and Technology(POSTECH)Pohang 37673Republic of Korea State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an 710072China Xi’an Rare Metal Materials lnstitute Co.Ltd Xi’an 710016China Department of Materials Science and Engineering Pohang University of Science and Technology(POSTECH)Pohang 37673Republic of Korea DepartmentAdvanced Institute for Materials Research(WPI-AIMR) Tohoku UniversitySendai 980-8577Japan Institute for Convergence Research and Education in Advanced Technology Yonsei UniversitySeoul 03722South Korea

Mg-Gd-Zn based alloys have better creep resistance than other Mg alloys and attract more attention at elevated ***,the multiple alloying elements and various heat treatment conditions,combined with complex microstructural evolution during creep tests,bring great challenges in understanding and predicting creep *** this study,we proposed to predict the creep properties and reveal the creep mechanisms of Mg-Gd-Zn based alloys by machine *** the one hand,the minimum creep rates were effectively predicted by using a support vector regression *** complex and nonmonotonic effects of test temperature,test stress,alloying elements,and heat treatment conditions on the creep properties were *** the other hand,the creep stress exponents and creep activation energies were calculated by machine learning to analyze the variation of creep mechanisms,based on which the constitutive equations of Mg-Gd-Zn based alloys were *** study introduces an efficient method to comprehend creep behaviors through machine learning,offering valuable insights for the future design and selection of Mg alloys.

关键词： Mg-Gd-Zn based alloys Machine learning Creep rate Creep mechanism Constitutive equation

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Amorphous-to-crystalline transition-induced two-step thin film growth of quasi-one-dimensional penta-telluride ZrTe5

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材料科学技术（英文版） 2025年第7期210卷 246-253页

作者： Yi Shuang Yuta Saito Shogo Hatayama Paul Fons Ando Daisuke Yuji Sutou WPI Advanced Institute for Materials Research Tohoku University2-1-1 KatahiraAoba-kuSendai 980-8577Japan Research Center for Green X-Tech Tohoku University6-6-11 Aoba-yamaAoba-kuSendai 980-8579Japan Department of Materials Science Graduate School of EngineeringTohoku University6-6-11 Aoba-yamaSendai 980-8579Japan Device Technology Research Institute National Institute of Advanced Industrial Science and Technology(AIST)Tsukuba Central 2Umezono 1-1-1Tsukuba 305-8568Japan Device Technology Research Institute National Institute of Advanced Industrial Science and Technology(AIST)Tsukuba Central 2Umezono 1-1-1Tsukuba 305-8568Japan Department of Electronics and Electrical Engineering Faculty of Science and TechnologyKeio University3-14-1 HiyoshiKohoku-kuYokohamaKanagawa 223-8522Japan Department of Materials Science Graduate School of EngineeringTohoku University6-6-11 Aoba-yamaSendai 980-8579Japan WPI Advanced Institute for Materials Research Tohoku University2-1-1 KatahiraAoba-kuSendai 980-8577Japan Department of Materials Science Graduate School of EngineeringTohoku University6-6-11 Aoba-yamaSendai 980-8579Japan

Quasi-one-dimensional(quasi-1D)van der Waals(vdWs)materials,such as ZrTe5,exhibit unique elec-trical properties and quantum phenomena,making them attractive for advanced electronic ***,large-scale growth of ZrTe5 thin films presents *** address this by employing sput-tering,a common semiconductor industry *** as-deposited ZrTe5 film is amorphous,and post-annealing induces a crystallization process akin to transition-metal *** study in-vestigates the electrical and optical properties during this amorphous-to-crystalline transition,reveal-ing insights into the underlying *** work contributes to the fundamental understanding of quasi-1D materials and introduces a scalable fabrication method for ZrTe5 which offers the possibility of fabricating unique future electronic and optical devices.

关键词： Quasi-one-dimensional ZrTe5 Large-scale Thin film Phase-change

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Thinner 2D α-MoO_(3) makes setting up memristors easier

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Journal of Materiomics 2024年第6期10卷 1279-1289页

作者： Yukun Hong Shangui Lan Baojun Pan Zhixiang Zhang Bingbing Chen Lijie Zhang Peijian Wang Key Laboratory of Carbon Materials of Zhejiang Province College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou325035ZhejiangChina Institute of New Materials&Industrial Technologies Wenzhou UniversityWenzhou 325024China ZJU-Hangzhou Global Scientific and Technological Innovation Center Zhejiang UniversityHangzhou311215China Macao Institute of Materials Science and Engineering(MIMSE) MUST-SUDA Joint Research Center for Advanced Functional MaterialsMacao University of Science and TechnologyTaipa999078MacaoChina Department of Energy Science and Engineering Nanjing Tech UniversityNanjing210009China

Two-dimensional(2D)metal oxide α-MoO_(3) shows great potentials because of its very high dielectric constant,air stability and anisotropic phonon ***,a method to produce ultrathin single crystallineα-MoO_(3) with high transferability for functional device architecture is ***,we report on the controllable synthesis of ultrathinα-MoO_(3) single crystals via chemical vapor deposition(CVD)assisted by plasma *** also carried out systematic computational work to explicate the mechanism for the slantly-oriented growth of thin nanosheets on plasma-pretreated *** method possesses certain universality to synthesize other ultrathin oxide materials,such as Bi_(2)O_(3) and Sb_(2)O_(3) ***-grownα-MoO_(3) presents a high dielectric constant(≈40),ultrathin thickness(≈3 nm)and high *** withα-MoO_(3) as the functional layers show excellent performance featuring high on/off ratio of approximately 104,much lower set voltage around 0.5 V,and highly repetitive voltage sweep *** power consumption of MoO_(3) memristors is significantly reduced,resulted from reduced thickness of the MoO_(3) *** crystal ultrathinα-MoO_(3) shows great potentials in post-Moore memristor and the synthesis of CVD assisted by plasma pretreatment approach points to a new route for materials growth.

关键词： Ultrathin molybdenum trioxide Thickness controlling High transferability Memristor Low power consumption

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Giant anisotropy of magnetic damping in an epitaxial Cr/Fe bilayer with the absence of magnetocrystalline anisotropy

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Physical Review materials 2024年第4期8卷 L041401-L041401页

作者： Thanh-Huong Thi Nguyen Jungmin Park Jae-Hyun Ha Soogil Lee Van Quang Nguyen Nyun Jong Lee Byong-Guk Park Sunglae Cho Jung-Il Hong Sanghoon Kim Department of Physics and Chemistry Daegu Gyeongbuk Institute of Science and Technology Daegu 42988 Korea Department of Physics Korea Advanced Institute of Science and Technology Daejeon 34141 Korea Department of Materials Science and Engineering Korea Advanced Institute of Science and Technology Daejeon 34141 Korea Korea Atomic Energy Research Institute Daejeon 34057 Korea Department of Physics University of Ulsan Ulsan 44610 Korea

Magnetic damping is one of the most important parameters governing the critical current density for current-induced magnetization switching in spin-torque devices. The anisotropic nature of magnetic damping, influenced by both intrinsic and extrinsic factors, has been demonstrated in both theoretical and experimental studies. Nevertheless, understanding the underlying mechanisms of magnetic damping anisotropy, particularly in the bilayer structure of a ferromagnet and a nonmagnetic metal, remains an open challenge. In this study, we investigate the crystallographic dependence of magnetic damping in an epitaxial Cr/Fe bilayer, which has negligible magnetocrystalline anisotropy. We experimentally extracted the total damping by conducting frequency-dependent ferromagnetic resonance measurement at different in-plane angles. The observed damping reveals a strong angular dependence with an anisotropy of ∼400% in the bilayer. All possible contributions to the total damping will be discussed carefully to clarify the origin of the profound damping anisotropy observed in our Cr/Fe bilayer.

关键词： Magnetotransport Magnons Spin dynamics

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Atomically Dispersed Ruthenium Catalysts with Open Hollow Structure for Lithium-Oxygen Batteries

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Nano-Micro Letters 2024年第2期16卷 154-164页

作者： Xin Chen Yu Zhang Chang Chen Huinan Li Yuran Lin Ke Yu Caiyun Nan Chen Chen Beijing Advanced Innovation Center for Materials Genome Engineering Institute of Solid State ChemistryUniversity of Science and Technology BeijingBeijing 100083People’s Republic of China Engineering Research Center of Advanced Rare Earth Materials Department of ChemistryTsinghua UniversityBeijing 100084People’s Republic of China Beijing Key Laboratory of Energy Conversion and Storage Materials Institution College of ChemistryBeijing Normal UniversityBeijing 100875People’s Republic of China

Lithium–oxygen battery with ultrahigh theoretical energy density is considered a highly competitive next-generation energy storage device,but its practical application is severely hindered by issues such as difficult decomposition of discharge products at ***,we have developed N-doped carbon anchored atomically dispersed Ru sites cathode catalyst with open hollow structure(h-RuNC)for Lithium–oxygen *** one hand,the abundance of atomically dispersed Ru sites can effectively catalyze the formation and decomposition of discharge products,thereby greatly enhancing the redox *** the other hand,the open hollow structure not only enhances the mass activity of atomically dispersed Ru sites but also improves the diffusion efficiency of catalytic ***,the excellent activity from atomically dispersed Ru sites and the enhanced diffusion from open hollow structure respectively improve the redox kinetics and cycling stability,ultimately achieving a high-performance lithium–oxygen battery.

关键词： Atomically dispersed Open hollow structure Discharge product Lithium Oxygen battery

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A neural network model for high entropy alloy design

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npj Computational materials 2023年第1期9卷 1734-1746页

作者： Jaemin Wang Hyeonseok Kwon Hyoung Seop Kim Byeong-Joo Lee Department of Materials Science and Engineering Pohang University of Science and Technology(POSTECH)Pohang 37673Republic of Korea Graduate Institute of Ferrous and Energy materials Technology(GIFT) Pohang University of Science and Technology(POSTECH)Pohang 37673Republic of Korea Center for Heterogenic Metal Additive Manufacturing Pohang University of Science and Technology(POSTECH)Pohang 37673Republic of Korea Institute for Convergence Research and Education in Advanced Technology Yonsei UniversitySeoul 03722Republic of Korea Advanced Institute for Materials Research(WPI-AIMR) Tohoku UniversitySendai 980-8577Japan

A neural network model is developed to search vast compositional space of high entropy alloys(HEAs).The model predicts the mechanical properties of HEAs better than several other ***’s because the special structure of the model helps the model understand the characteristics of constituent elements of *** addition,thermodynamics descriptors were utilized as input to the model so that the model predicts better by understanding the thermodynamic properties of HEAs.A conditional random search,which is good at finding local optimal values,was selected as the inverse predictor and designed two HEAs using the *** experimentally verified that the HEAs have the best combination of strength and ductility and this proves the validity of the model and alloy design *** strengthening mechanism of the designed HEAs is further discussed based on microstructure and lattice distortion *** present alloy design approach,specialized in finding multiple local optima,could help researchers design an infinite number of new alloys with interesting properties.

关键词： alloy alloys microstructure

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MMP-9-responsive probe for fiuorescence-magnetic resonance dual-mode imaging of hepatocellular carcinoma models with different metastatic capacities

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Chinese Chemical Letters 2025年第4期36卷 351-356页

作者： Qiuye Wang Yabing Sun Liangxue Lai Haijing Cui Yonglong Ye Ming Yang Weihao Zhu Bo Yuan Quanliang Mao Wenzhi Ren Aiguo Wu Ningbo Key Laboratory of Biomedical Imaging Probe Materials and Technology Zhejiang International Cooperation Base of Biomedical Materials Technology and ApplicationChinese Academy of Sciences(CAS)Key Laboratory of Magnetic Materials and DevicesNingbo Cixi Institute of Biomedical EngineeringZhejiang Engineering Research Center for Biomedical MaterialsNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Cixi Biomedical Research Institute Wenzhou Medical UniversityNingbo 315300China Advanced Energy Science and Technology Guangdong Laboratory Huizhou 516000China Department of Radiology First Affiliated Hospital of Ningbo UniversityNingbo 315010China

Visual assessment of tumor metastatic capacity is crucial for predicting hepatocellular carcinoma(HCC)prognosis and guiding clinical therapeutic *** this study,we developed an enzyme-responsive probe based on the peptide GK10,which is selectively cleaved by matrix metalloproteinase-9(MMP-9),a critical marker for metastasis in *** GK10 peptide was conjugated with near-infrared fiuorescent molecule IR783,fiuorescent quencher black hole quencher 3(BHQ3),and magnetic resonance(MR)contrast agent DOTA-Gd,forming the IR783-GK10-BHQ3-Gd *** MMP-9 cleavage of GK10,BHQ3 is released from the probe,thereby amplifying the previously quenched IR783 fiuorescence *** vitro experiments demonstrate the probe's impressive detection limit for MMP-9,as low as 1.84 ng/m ***,in vivo imaging results reveal that the probe can differentiate liver cancers with varying metastatic *** fiuorescence and MR imaging signal intensity of high metastatic HCC are approximately1.2 times greater than that of low metastatic ***,this engineered probe holds promise as a valuable tool for evaluating HCC metastatic capacity through fiuorescence-MR dual-mode imaging.

关键词： Hepatocellular carcinoma Matrix metalloproteinase-9 Fluorescence imaging Magneticresonance imaging F?rster resonance energy transfer

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Semi-closed synthesis of nitrogen and oxygen Co-doped mesoporous carbon for selective aqueous oxidation

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Green Energy & Environment 2022年第1期7卷 43-52页

作者： Chen Xing Daihui Yang Yan Zhang Tian Sun Junfei Duan Hussein A.Younus Shiguo Zhang College of Materials Science and Engineering Hunan Province Key Laboratory for Advanced Carbon Materials and Applied TechnologyHunan UniversityChangsha410082China School of Materials Science and Engineering Changsha University of Science and TechnologyChangsha410004China Chemistry Department Faculty of ScienceFayoum UniversityFayoum63514Egypt

Heteroatom-doped meso/micro-porous carbon materials are conventionally produced by harsh carbonization under an inert atmosphere involving specific precursors,hard/soft templates,and heteroatom-containing ***,we report a facile synthesis of N and O co-doped meso/micro-porous carbon(NOMC)by template-free carbonization of a small-molecule precursor in a semi-closed *** semi-closed carbonizaiton process yields hydrophilic NOMCs with large surface area in a high *** porous structure as well as the elemental composition of NOMCs can be modulated by changing the holding time at a particular *** as metal-free heterogeneous catalysts can selectively oxidize benzyl alcohol and its derivatives into aldehydes/ketones with>85%conversion in aqueous solution,which is much higher than that of the control sample obtained in tube furnace(21%conversion),mainly due to their high N content,high percentage of pyridinic N,and large surface *** presence of O-containing moieties also helps to improve the hydrophilicity and dispersion ability of catalysts and thus facilitates the mass transfer process during aqueous *** NOMC catalysts also dispayed excellent activity for a wide range of substrates with a selectivity of>99%.

关键词： Semi-closed carbonization Nitrogen and oxygen doping Mesoporous carbon Metal-free catalyst Selective aqueous oxidation

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Smart window of large transparency-tuning capacity

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science China(Technological sciences) 2023年第11期66卷 3107-3114页

作者： WANG YuZhe LI PengCheng OUYANG JianYong ZHU Jian Singapore Institute of Manufacturing Technology(SIMTech) Agency for ScienceTechnology and Research(A*STAR)Singapore 138634Singapore Department of Materials Science and Engineering National University of SingaporeSingapore 117575Singapore Hubei Key Laboratory of Plasma Chemistry and Advanced Materials School of Materials Science and EngineeringWuhan Institute of TechnologyWuhan 430205China School of Science and Engineering Chinese University of Hong Kong at ShenzhenShenzhen 518172China Shenzhen Institute of Artificial Intelligence and Robotics for Society Shenzhen 518129China

Windows are one of the least energy-efficient components of a *** allows energy to escape,leading to high cooling demand in summer and energy loss in *** and temperature in the building also affect people's health,comfort,and even *** a result,controlling the heat and light entering the building dynamically is critical for improving the comfort of building occupants and reducing energy *** this work,we develop a tunable smart window based on transparent dielectric elastomer actuators(DEAs)as an alternative solution to sunlight and temperature *** transparency-tuning is achieved by creating wrinkles in a soft elastomer film made of waterborne polyurethane(WPU).The actuation mechanism is based on highly transparent dielectric elastomer actuators that use all solid-state stretchable transparent conductive polymer poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)/(PEDOT:PSS/WPU)as compliant *** modulation range of the smart tunable window with direct viewing is achieved to be 35%to 90%,which is one of the largest among existing tunable *** the low-transparency state,the window can also effectively block the heat and decrease the temperature rise to 2℃over 200 s,while the ambient temperature rises by 6℃with direct *** anticipate that this transparency-tuning mechanism is potentially useful for privacy protection,smart glass,projector screens,displays,and *** heat isolation feature also has the potential to reduce carbon emissions and improve the sustainability of buildings and greenhouses.

关键词： smart window dielectric elastomer transparency tuning transparent electrodes wrinkles

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An artificial interphase enables stable PVDF-based solid-state Li metal batteries

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Nano Research 2024年第3期17卷 1482-1490页

作者： Mengjun Wu Jiangping Song Jiaheng Lei Haolin Tang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Department of Chemistry School of ChemistryChemical Engineering and Life SciencesWuhan University of TechnologyWuhan 430070China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Foshan 528200China

Composite polymer electrolytes(CPEs)have attracted much attention for high energy density solid-state lithium-metal batteries owing to their flexibility,low cost,and easy ***,the unstable Li/CPE interface is always challengeable for the practical utilization of ***,a polymer interlayer containing K+prepared by ultraviolet(UV)-curing precursor solution is coated on Li surface to stabilize the interface between poly(vinylidene difluoride)(PVDF)composite electrolytes and Li *** from the physical barrier of the interlayer,the continuous decomposition of PVDF is restrained and the intimate contact between electrode and electrolyte is also achieved to reduce the interface ***,the added K+is utilized to further regulate smooth Li *** a consequence,the symmetric Li|Li cell with coated Li demonstrates steady cycling at 0.4 mAh·cm^(-2) and a high critical current density of 1 mA·cm^(-2).The assembled Li|LiFePO_(4) cell presents outstanding cycling stability(capacity retention of 90%after 400 cycles at 1 C)and good rate *** associated pouch cell performs impressive flexibility and *** work provides a convenient strategy to achieve stable Li/PVDF interface for high-performance PVDF-based solid state Li metal batteries.

关键词： interfacial modification solid-state batteries composite polymer electrolytes interfacial compatibility lithium dendrite

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