Article
Chemistry, Physical
Anouar El Magri, Rachid Hsissou, Abdelfettah Hmada, Avni Berisha, Nadia Dkhireche, Sebastien Vaudreuil
Summary: This study investigates the anticorrosion protection potential of new EPT/MDA, EPT/MDA/0.04, and EPT/MDA/0.08 cured epoxy polymer composite coatings on 3D printed H13 steel surface in 1 M HCl medium. The coatings were characterized using FTIR spectroscopy, SEM, electrochemical measurements, and CA. The results show that the corrosion current density significantly decreases with the presence of the polymer composite coatings. The highest protection efficiency of 93% was achieved with EPT/MDA/0.08.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Materials Science, Multidisciplinary
Wojciech Macek, Rui F. Martins, Ricardo Branco, Zbigniew Marciniak, Miroslaw Szala, Sebastian Wronski
Summary: This paper focuses on studying the impact of fatigue loading on metallic structure, lifetime, and fracture surface topographies in AISI H13 steel specimens obtained by selective laser melting (SLM). The investigation compares the fatigue results of SLM 3D printed steel specimens with conventionally manufactured 13H steel. The research also analyzes the fractographic evaluation and microtomography to understand the influence of stress levels and porosity distribution on the fracture surfaces.
INTERNATIONAL JOURNAL OF FRACTURE
(2022)
Article
Chemistry, Physical
Filip Vele, Michal Ackermann, Vaclav Bittner, Jiri Safka
Summary: The study investigates the impact of SLM technology on the porosity and hardness of AISI H13 tool steel, identifying the minimum energy density required for a satisfactory density and hardness level, and proposing phenomenological models based on experimental data analysis.
Article
Engineering, Mechanical
Jose F. Garcias, Rui F. Martins, Ricardo Branco, Zbigniew Marciniak, Wojciech Macek, Candida Pereira, Cyril Santos
Summary: This work compared the mechanical behavior of an AISI H13 steel obtained by additive manufacturing with that obtained by conventional manufacturing methods. The study found significant differences in ultimate tensile strength, ductility, and hardness between the two methods, with porosity and lack of fusion negatively impacting the static and fatigue strength in SLM specimens.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Giorgio De Pasquale, Stefano Sibona
Summary: Metal lattice structures fabricated by additive manufacturing processes combined with polymers exhibit unexpected mechanical properties, with the composite material capable of absorbing elastoplastic energy up to 75% higher than the sum of energies absorbed by each constituent material. The fabrication process for creating reliable and repeatable hybrid components by filling metal lattice with polymer has been introduced and validated.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Crystallography
Hui Li, Jianhao Zhang
Summary: This paper investigates the fracture behaviors of 316L stainless steel fabricated by SLM additive manufacturing using a peridynamic method. The study proposes pairwise force of a bond for an orthotropic material model and a three-step approach to describe void defects. Numerical examples validate the method's accuracy and show the significant influence of material features on bearing capacity, crack propagation, and branching in structures. The findings lay a foundation for engineering applications of SLM additive manufacturing materials.
Review
Materials Science, Multidisciplinary
Netrapal Singh, Hafsa Siddiqui, Bhavani Srinivas Rao Koyalada, Ajay Mandal, Viplov Chauhan, Sathish Natarajan, Satendra Kumar, Manoj Goswami, Surender Kumar
Summary: This article provides a comprehensive review of various Additive Manufacturing processes, including a focus on the emerging technology of electrochemical additive manufacturing. It discusses the capabilities, advantages, limitations, and applications of these processes, and offers insights into future trends.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Biochemical Research Methods
Yong Tae Kim, Alireza Ahmadianyazdi, Albert Folch
Summary: Methods using 3D printers to make microfluidic chips have gained much attention for their simple procedures and minimal human intervention. Challenges lie in printing high-resolution chips that are transparent, biocompatible, and contain regions of dissimilar materials. The 'print-pause-print' protocol demonstrates strategies for fabricating transparent biomicrofluidic devices and multimaterial chips. The procedure takes less than 1 hour and enables various chip-based applications.
Article
Chemistry, Multidisciplinary
Marek Pagac, Jiri Hajnys, Radim Halama, Tariq Aldabash, Jakub Mesicek, Lukas Jancar, Jan Jansa
Summary: This paper discusses the experimental analysis of stress prediction and simulation before 3D printing using the SLM method, as well as the separation of printed samples from the base plate in two software programs. The study verifies the simulation on a 3D-printed topologically optimized part made of AISI 316L stainless steel and emphasizes the importance of simulation software in additive production. The paper highlights the strengths and weaknesses of simulation software, not only in scientific research but also in practical applications.
APPLIED SCIENCES-BASEL
(2021)
Article
Optics
Chao Meng, Rui Cao, Jingyue Li, Fuyang Geng, Yuwei Zhang, Chun Wu, Xuelei Wang, Weibin Zhuang
Summary: The bionic laser surface treatment on H13 steel can significantly improve its service life. The microstructure and microhardness of the laser alloying zone of H13 steel were refined and increased with increasing TiC fraction. Tensile strength gradually increased with higher TiC fraction, while wear resistance showed an initially increasing and then decreasing trend.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Sunil Kumar, Saikat Ranjan Maity, Lokeswar Patnaik
Summary: This study focuses on the manufacturing of H13 tool steel samples using the selective laser melting (SLM) process, with further investigations on tempering and coating deposition. The tempered sample showed significantly improved hardness and mechanical properties, while TiAlN coating exhibited better adhesion with the tempered sample compared to the as-SLM sample in adhesion tests.
ADVANCES IN MATERIALS AND PROCESSING TECHNOLOGIES
(2022)
Article
Engineering, Mechanical
Bobby Gillham, Andrei Yankin, Fionnan McNamara, Charles Tomonto, Chunjie Huang, Jeroen Soete, Garret O'Donnell, Daniel Trimble, Shuo Yin, David Taylor, Rocco Lupoi
Summary: This study aims to apply the Theory of Critical Distances (TCD) to assess the fatigue of additively manufactured Ti-6Al-4V material. Modified alternatives to traditional TCD methods are considered to develop a better fatigue prediction model that takes into account multiple stress-rising features in close proximity. The research also addresses the issue of applying the TCD methodology to components with a smaller area of interest than the critical distance length parameter. Different strategies were attempted and an optimal novel strategy achieved average error margins of 13.7% or better, showing potential for improving the accuracy of service life evaluation for metallic AM components.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Engineering, Mechanical
Marco Sorgato, Rachele Bertolini, Andrea Ghiotti, Stefania Bruschi
Summary: Laser cladding is a technique used to deposit high-quality metallic coatings on poor-performing metal alloy surfaces. This study investigated the effects of laser cladding-induced microstructure on tool wear and hole quality during drilling of multi-layered claddings. C45 steel substrates were laser cladded with multiple AISI H13 tool steel layers, and the samples were characterized and tested for drill bit wear and hole quality. The results showed that the microstructural features induced by the deposition process significantly affected tool wear and hole quality.
Article
Materials Science, Multidisciplinary
Kanwal Chadha, Yuan Tian, Kuda Nyamuchiwa, John Spray, Clodualdo Aranas Jr
Summary: This study investigates the austenite transformation in additively manufactured H13 tool steel, and explores the influence of austenite fraction and carbide precipitation on its properties. The results show that the austenite fraction and carbide precipitation affect the strength and ductility of the tool steel. Furthermore, a detailed microstructural analysis reveals that the metastable austenite phase dynamically transforms to martensite.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Rongchun Chen, Liyong Chen, Zhigang Wang, Renguo Guan, Huijun Kang
Summary: Heterogeneous nucleation of rare-earth oxides is an effective approach for optimizing the precipitation behavior of carbides in steels. In this study, the critical role of heterogeneous nucleation in interface relationships, lattice structures, and element distributions was revealed in 0.013Y-H13 die steel. The presence of submicron scaled Y2O3 phases induces heteromorphic nucleation effects on carbides, such as VC and Cr23C6, with mutual diffusion behavior between carbides and Y2O3. Our work provides important insights into the nature of heterogeneous nucleation induced by RE oxides and the associated mutual diffusion behavior between carbides and RE oxides.
MATERIALS CHARACTERIZATION
(2023)
Article
Substance Abuse
Chen Mo, Jingtao Wang, Zhenyao Ye, Hongjie Ke, Song Liu, Kathryn Hatch, Si Gao, Jessica Magidson, Chixiang Chen, Braxton D. D. Mitchell, Peter Kochunov, L. Elliot Hong, Tianzhou Ma, Shuo Chen
Summary: The study found a significant causal effect of smoking on the brain age gap, suggesting that smoking prevention can be an effective intervention for accelerated brain aging and age-related decline in cognitive function.
Article
Materials Science, Multidisciplinary
Shuming Chen, Jintao Wang, Ning Jiang, Zhenyu Wang, Ziqiang Chen, Chenyang He, Kai Fang, Jian Zhang, Long Yuan, Ye Li, Chuannan Li, Ping Chen, Yu Duan
Summary: It can be seen that PSCs have broad application prospects in the field of renewable energy. Passivation of perovskite films by antioxidants, such as edaravone (EDA), is an effective approach to improve the performance and stability of PSCs. The EDA-optimized device achieves a champion power conversion efficiency (PCE) of 20.81%, and after 1000 hours of exposure to the environment, the efficiency can maintain 72% of the original value.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2023)
Article
Engineering, Chemical
Jintao Wang, Hao Jing, Yaning Feng, Haiwen Ge, Liang Chen, Jie Lin, Zhaojun Xi, Xinguang Cui
Summary: This study numerically investigates the behavior of Martian micro-particles in a human alveolar model under Martian gravity. It considers various physical and physiological factors and makes important findings: 1) Martian particle deposition is sensitive to alveolar direction and respiratory depth, but not to wall motion pattern; 2) particle size and density affect the starting time and duration of deposition; 3) compared to Earth gravity, deposition efficiency decreases and deposition time is prolonged under Martian gravity. It concludes that particle deposition under Martian gravity differs significantly from that under Earth gravity.
Article
Multidisciplinary Sciences
Bowen Bai, Qipeng Yang, Haowen Shu, Lin Chang, Fenghe Yang, Bitao Shen, Zihan Tao, Jing Wang, Shaofu Xu, Weiqiang Xie, Weiwen Zou, Weiwei Hu, John E. E. Bowers, Xingjun Wang
Summary: In this work, optical convolution is achieved through a time-wavelength plane stretching approach on a microcomb-driven chip-based photonic processing unit. Optical neural networks (ONN) have greatly benefited from parallel convolution-operation technology, which utilizes the dimension of optical wavelength to enhance complexity and functionality. However, challenges in high-level integration and on-chip operation remain for this advanced architecture. The authors develop a dedicated control and operation protocol, enabling a record high weight precision and demonstrating comparable processing capability to that of a digital computer in proof-of-concept experiments.
NATURE COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Jintao Wang, Jianqiang Wang, Fangcheng Duan, Hongtao Chen
Summary: With the challenge of high-temperature materials, a Cu@Cu6Sn5 core-shell bimetallic particles were successfully prepared as a new solder material for the packaging of high-power electronic devices, resulting in a Cu3Sn all-IMC solder joint consisting of equiaxed Cu3Sn grains and a small portion of columnar Cu3Sn grains. In columnar growth, Sn is the dominant diffusing species, while in equiaxed growth, Cu is the dominant diffusing species.
SCIENTIFIC REPORTS
(2023)
Article
Cell Biology
Lanmin Guo, Zhi-Mei Jiang, Yu-Jun Zhan, Wei Pan, Qing-Wei Wu, Fan-Xu Song, Xue Zhou, Xin-Yu Zhou, Li-Jun Liu, Jing-Tao Wang
Summary: Autism Spectrum Disorder (ASD) is a complex neurodevelopmental disorder that affects children's social, behavioral, and communication abilities. This study investigated the impact of the SIRT2 gene in regulating inflammation in a mouse model of ASD. The results showed that the deletion of the SIRT2 gene led to decreased neuronal richness and increased neuroinflammation in the hippocampus, suggesting it as a potential target for ASD or stress treatment.
JOURNAL OF CELLULAR PHYSIOLOGY
(2023)
Article
Engineering, Environmental
Xinguang Cui, Wei Song, Yuan Xue, Hanxiong Guan, Jinhua Zhang, Xinxing He, Honglei Ma, Ming Lei, Jintao Wang, Yichao Li
Summary: Understanding how lunar dust particles deposit in the human respiratory system is crucial for protecting astronauts from lunar dust toxicity. A Euler-Lagrangian method is used to track the motion of lunar dust particles in a human oral airway model. The study considers different factors such as inspiration rates, particle sizes, abnormal pressures, and temperatures. The findings show that most lunar dust particles tend to enter the right lung, especially the upper right lobe. Lower ambient pressure leads to fewer particles depositing in the upper airway and more entering the lung. Lower temperature results in more particles depositing in the upper airway and fewer in the lung.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Hai-Yan Huang, Qian Wang, Chun-Yan Zhang, Zi-Xiang Chen, Jin-Tao Wang, Xiang-Wen Liao, Ru-Jian Yu, Yan-Shi Xiong
Summary: In this study, four ruthenium complexes modified with selenium-ether were synthesized and showed excellent antibacterial activity against Staphylococcus aureus (S. aureus). The most active complex, Ru(II)-4, efficiently targeted the bacterial cell membrane, preventing drug resistance and inhibiting biofilm formation. In toxicity experiments, Ru(II)-4 exhibited low mammalian toxicity. In vivo tests using both G. mellonella wax worms and mouse skin infection models confirmed the potential of Ru(II)-4 as an effective antibacterial agent against S. aureus infections, with minimal toxicity to mouse tissue. These findings highlight the promising strategy of introducing selenium-atom into ruthenium compounds for developing interesting antibacterial agents.
JOURNAL OF INORGANIC BIOCHEMISTRY
(2023)
Article
Engineering, Electrical & Electronic
Ziwen Lv, Jintao Wang, Fengyi Wang, Weiwei Zhang, Jianqiang Wang, Chunjin Hang, Hongtao Chen
Summary: In this study, Cu6Sn5 nanoparticles were added to SAC305 solder paste to improve its mechanical strength and service reliability. The addition of Cu6Sn5 NPs enhanced the solderability and shear strength of the composite solder paste, leading to improved reliability in harsh operating environments.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Jianqiang Wang, Fangcheng Duan, Jintao Wang, Weiwei Zhang, Luobin Zhang, Mingyu Li, Chunjin Hang, Hongtao Chen, Jiahao Liu
Summary: In recent years, porous metals have been used for transient liquid phase bonding due to their high specific surface areas. However, the reliability issues of porous metal joints have been neglected in current studies. In this study, we prepared a porous Cu joint for high-temperature-resistant packaging and investigated its aging and thermal shock resistance. The results showed that the porous Cu joints exhibited good aging resistance and excellent thermal shock resistance.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Physical
Shuming Chen, Jintao Wang, Zhenyu Wang, Ziqiang Chen, Kai Fang, Chenyang He, Ning Jiang, Jian Zhang, Ye Li, Chuannan Li, Peng Li, Wenlong Jiang, Yu Duan
Summary: In this study, the additive 343FP was introduced into PTAA and it was found that the addition of 343FP improved charge transport properties and device efficiency of the resulting perovskite solar cell. Furthermore, the device with 343FP-doped PTAA exhibited better environmental stability.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Energy & Fuels
Chenyang He, Jintao Wang, Shuming Chen, Yibin Zhou, Ning Jiang, Jian Zhang, Yu Duan
Summary: The researchers designed a sandwich-type transparent conductive electrode by combining atomic layer deposition ZnO and thermally evaporated Ag films, proving that its film conductivity and optical transmittance are superior to metal electrodes with the same thickness. By using an optimized solution-based thin and continuous CH3NH3PbI3 (MAPbI(3)) film as the light absorber layer, the semitransparent perovskite solar cells (ST-PSCs) achieved a power conversion efficiency of 10% and an average visible transmittance of 19.6%. These findings illustrate a novel structure design strategy to overcome the contradiction between the efficiency and transparency of ST-PSCs.
Article
Engineering, Electrical & Electronic
Ziwen Lv, Jintao Wang, Fengyi Wang, Weiwei Zhang, Jianqiang Wang, Fuquan Li, Hongtao Chen
Summary: The increase in packaging and power density has resulted in a higher electric field strength between solder joints and increased potential for failure due to electrochemical migration. To enhance the anti-electrochemical migration ability of SAC305 solder, Cu6Sn5 nanoparticles (NPs) were added to the paste and their mechanism for inhibiting ECM was studied. Cu6Sn5 NPs were prepared through ultrasound-assisted chemical reduction and composite solder pastes were prepared by mechanically mixing them with SAC305. In situ observation showed that adding 0.6 wt% Cu6Sn5 NPs effectively inhibited ECM by prolonging the incubation period, but exceeding this amount led to accelerated failure. Furthermore, Cu6Sn5 NPs increased the threshold for instantaneous failure under high voltage.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Review
Chemistry, Multidisciplinary
Jintao Wang, Fangcheng Duan, Ziwen Lv, Si Chen, Xiaofeng Yang, Hongtao Chen, Jiahao Liu
Summary: This review focuses on the measurement methods used to evaluate the geometry and electrical properties of through-silicon vias (TSVs) and examines the reliability issues associated with TSVs in 3D integrated circuits (ICs). Non-destructive measurement techniques for TSV contours and copper fillings have been researched, including high-frequency signal analysis methods and thermal detection methods. The reliability risks of TSVs arise from various factors such as copper contamination, thermal fields in 3D-ICs, stress fields, noise coupling, and interactions between multiple physical fields. Designing reliable 3D-ICs with TSVs requires electrical characterization of copper contamination, assessment of stress distribution using micro-Raman spectroscopy and finite element simulations, and the proposal of shield insertion to mitigate cross-coupling effects.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Multidisciplinary
Jintao Wang, Jianqiang Wang, Luobin Zhang, Ziwen Lv, Hongtao Chen, Mingyu Li
Summary: An intermetallic compound (IMC) capsule was developed to optimize the interfacial properties of copper pillars by adding Co and overcome the oxidation tendency of Co. The transformation process of CoSn2 nanoparticles into CoSn3 at the nanoscale was comprehensively analyzed using in situ heating transmission electron microscopy (TEM). The experimental results showed that CoSn2 nanoparticle growth occurred through polymerization, while CoSn3 nanoparticle formation relied on the reaction between CoSn2 and Sn.
