Article
Materials Science, Coatings & Films
Guang-yu He, Dan-yang Sun, Shun-lai Zang, Jiao Chen, Zhi-hao Fang
Summary: The study integrates the Levenberg-Marquardt optimization algorithm with finite element analysis to characterize the elastic-plastic mechanical properties of coating materials using different hardening models. Material properties are optimized based on load-displacement curves from various models, and the sensitivity of model parameters is analyzed. The results show impressive consistency in yield stress, elastic modulus, and the initial stress-strain curve, but accuracy decreases in large strain ranges.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Physical
Jinming Li, Yuhua Huang, Yuqi Zhou, Fulong Zhu
Summary: Molecular dynamics simulations were used to investigate the repeated nanoindentation on aluminum substrate with varying thicknesses of boron nitride nanosheet coating. The study reveals that the hardness of the substrate increases with coating thickness. The pressure area of the aluminum substrate also increases with coating thickness. The coating force causes more atoms to move along the loading direction, leading to substrate slip and severe atomic strain. However, some aluminum atoms are able to elastically recover after unloading, despite being severely deformed. After multiple loadings, elastic deformations transition into plastic deformations, possibly accompanied by lattice structure destruction and the presence of amorphous atoms.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Taehee Kim, Hyeonho Cho, Seung Tae Choi, Woochul Nam, Sangmin Lee, Hong Liang, Sunghan Kim
Summary: This study investigated the controlled deposition of graphene oxide on anodic aluminum oxide (AAO) by suppressing the coffee-ring effect. Factors such as AAO thickness, pore diameter, external temperature, and applied electric potential were studied for their effect on capillary flow and the suppression of the coffee-ring effect. Optimizing the control of the coffee-ring effect is crucial for obtaining uniform colloid deposition.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Ladislav Cvrcek, Jan Krcil, Jana Musilkova, Veronika Musilkova, Lucie Bacakova, Vaclav Nehasil, Frantisek Denk, Zdenek Cejka
Summary: In this study, a PEEK material with a gradient surface topography and suitable chemical composition was prepared by 3D printing and coating with a nanostructured TiNb layer. The surface properties and biological activity were analyzed, and the results showed that the nanostructured TiNb layer significantly improved the biological activity of PEEK.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
Xuegang Xing, Yongsheng Wang, Gesheng Xiao, Xuefeng Shu, Shengwang Yu, Yucheng Wu
Summary: Nanoindentation analysis was used to extract the elastoplastic properties of thin films on hard substrates. The relationships between indentation responses and film/substrate properties were established through dimensional analysis method. Reverse analysis algorithms were proposed to introduce substrate effects and provide information at different indentation depths, successfully obtaining elastic modulus, yield stress, and work hardening exponent of the film.
Review
Biochemistry & Molecular Biology
Anna M. Brudzisz, Damian Gizinski, Wojciech J. Stepniowski
Summary: Anodic oxidation of metals leads to the formation of ordered nanoporous or nanotubular oxide layers, playing a significant role in various applications. However, there are still many fundamental aspects of anodizing that require deeper understanding. The inevitable phenomenon of anion incorporation during metal anodization and its impact on properties are discussed in detail in this review.
Article
Materials Science, Coatings & Films
Peilei Zhang, Qi Zhang, Hua Yan, Zhishui Yu, Jin Yang, Jieshi Chen, Di Wu, Haichuan Shi, Yingtao Tian, Songyun Ma, Weisheng Lei
Summary: In this research, an amorphous coating of Fe-Cr-Mo-C-B-Y metallic glass was developed on a steel substrate through laser surface treatment. The microstructure and phase distribution of the coating were analyzed, as well as its mechanical properties such as microhardness and abrasion resistance. The study found that the coating thickness, microstructure, and mechanical properties were influenced by the laser parameters used during the process.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Vitor Ferreira Vieira, Yukio Shigaki, Paulo Sergio Martins, Elhadji Cheikh Talibouya Ba, Cadmo Augusto Rodrigues Dias
Summary: Diamond-Like Carbon coating possesses characteristics such as high hardness, chemical inertness, and low friction coefficient, which can enhance the performance of cutting tools and mechanical components. Mechanical tests, such as nanoindentation, are crucial for understanding and improving coating techniques. In this study, a nanoindentation test simulation was conducted on a Diamond-Like Carbon coated high-speed steel specimen. The simulated results showed great similarity with experimental data, confirming the validity of the model.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jun Lan, Yong Yang, Song Hu
Summary: The antireflection performance of moth-eye nanostructured polymer film on PET substrate is influenced by various factors, with height and filling ratios being the dominant parameters. A parabola-shaped moth-eye structure with 400 nm base diameter and 300 nm height shows significant reduction in reflectivity for PET.
Article
Materials Science, Ceramics
S. S. Hirmukhe, A. Sharma, Sree Harsha Nandam, Horst Hahn, K. E. Prasad, I Singh
Summary: In this study, binary Cu60Zr40 nanoglasses and melt spun ribbons were synthesized and investigated through bonded interface and nanoindentation experiments. The results showed differences in shear band morphology and density between the two materials, and both exhibited an indentation size effect.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Nanoscience & Nanotechnology
Zhenqing Dai, Jiayuan He, Fangmei Zhou, Tingting Lai, Guangzheng Jiang, Kang Wang, Chengyong Li, Yuqiang Yang
Summary: A surface enhanced Raman spectroscopy (SERS) sensor combined with electric field enrichment technology was developed for rapid and quantitative detection of tetracycline (TC). The sensor showed real-time response and high sensitivity, allowing for quick analysis of TC and potential application in real food samples.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Civil
Xiao Xu, Chenqi Zou, Mengyan Zang, Shunhua Chen
Summary: This study aims to develop a GPU-based parallel computational framework to accurately and efficiently simulate the progressive debonding behavior of automotive coating-substrate interfaces under single-particle impact. By establishing an efficient finite element model and utilizing an intrinsic cohesive zone model coupled with a mortar-based contact algorithm, combined with GPU parallel computing technique, the computational efficiency is significantly improved.
THIN-WALLED STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Seyedeh Marjan Bararpour, Hamed Jamshidi Aval, Roohollah Jamaati
Summary: This study examined the impact of the rotational speed of an A356 aluminum alloy consumable rod on thermo-mechanical issues, microstructure, and wear resistance during friction surfacing on an AA2024 aluminum alloy. The study utilized a comprehensive experimental-numerical analysis to achieve its objectives. The findings suggest that increasing the rotational speed of the consumable rod leads to an increase in the width and thickness of the coating. A higher rotational speed facilitates plastic deformation of the material, resulting in softer material being deposited on the substrate's surface under reduced axial force. Simulation results show that the maximum plastic strain occurs on the coating's upper surface, which contacts the tip of the consumable rod. Moving towards the interface between the coating and the substrate, the degree of plastic strain rapidly decreases. Friction surfacing with specific processing parameters leads to improvements in the coating's hardness and wear resistance compared to the AA2024 substrate.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Uihwan Jeong, Jungmoo Han, Karuppasamy Pandian Marimuthu, Youngseo Lee, Hyungyil Lee
Summary: The nanomechanical properties of thin-film metallic glasses (TFMG) with different thicknesses were evaluated through nanoindentation experiments. The effects of film thickness and substrate type on material property evaluation were investigated, with the parameters of the free volume model (FVM) also influenced by the growth of free volume with increasing thickness.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Ceramics
Francieli Goncalves Franceschini, Oscar Rubem Klegues Montedo, Sabrina Arcaro, Carlos Perez Bergmann
Summary: Thermal fatigue causes irreversible damage in aluminum alloys, limiting their use in the automotive industry. Applying a glazed coating based on the aluminum borophosphate system can effectively improve wear resistance at high temperatures. The development of a crack-free material with good compatibility between the layers enhances the performance and thermal efficiency of the alloy, showing enormous potential applications in the automotive industry.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Composites
Zhong Hu, Varun Kumar Gadipudi, David R. Salem
APPLIED COMPOSITE MATERIALS
(2019)
Article
Engineering, Mechanical
Zhong Hu
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2019)
Article
Engineering, Multidisciplinary
Zhong Hu, Anthony P. Parker
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
(2019)
Article
Physics, Fluids & Plasmas
Bocong Zheng, Keliang Wang, Maheshwar Shrestha, Thomas Schuelke, Qi Hua Fan
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2019)
Article
Physics, Applied
Bocong Zheng, Maheshwar Shrestha, Keliang Wang, Thomas Schuelke, Evgeny Shun'ko, Veniamin Belkin, Qi Hua Fan
JOURNAL OF APPLIED PHYSICS
(2019)
Article
Materials Science, Multidisciplinary
Nina Baule, Young S. Kim, Andre T. Zeuner, Lars Haubold, Robert Kuehne, Osman L. Eryilmaz, Ali Erdemir, Zhong Hu, Martina Zimmermann, Thomas Schuelke, Qi-Hua Fan
Summary: The study developed a duplex surface treatment combining electrochemical boriding and hard tetrahedral amorphous carbon coatings to create extremely durable low-friction, wear, and corrosion-resistant surfaces for tribological components in harsh conditions. The duplex treatment showed excellent friction, wear, and corrosion resistance properties, with wear rates as low as 6 x 10(-8) mm(3)center·N-1 center·m(-1) and resistance to pinhole corrosion after exposure to 15% HCl for 3 hours at room temperature.
Article
Engineering, Multidisciplinary
Zhong Hu, Anthony P. Parker
Summary: The prediction of fatigue life and fail-safe design of autofrettaged tubes relies on accurate stress modeling which is affected by the Bauschinger effect. Developing a user-defined material model integrated into finite element analysis software is crucial for accurate stress analysis during the autofrettage process.
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
(2021)
Article
Physics, Applied
Thanh Tran, Young Kim, Nina Baule, Maheshwar Shrestha, Bocong Zheng, Keliang Wang, Thomas Schuelke, Qi Hua Fan
Summary: A single-beam ion source was developed and used in combination with magnetron sputtering to modulate the film microstructure. This method allows for adjustable magnetron voltage and current, resulting in the formation of polycrystalline ITO thin films with improved properties.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Youngsuk Kim, Nina Baule, Maheshwar Shrestha, Qi Hua Fan
Summary: A single-beam plasma source was used to deposit transparent and durable hydrogenated amorphous carbon coatings at room temperature, with high transmittance and high durability, suitable for many applications.
Review
Materials Science, Composites
Lida Najmi, Zhong Hu
Summary: This paper reviews the research on the thermal and electrical conductivity of carbon nanotubes (CNTs) and CNT-modified polymeric composites (CNTMPCs). Factors such as type, length, chirality, and interfacial interaction affect the conductivity of CNTs and CNTMPCs. The conductivity of CNTs depends on their chirality, where shorter length tubes are more affected by chirality. Moreover, hydrogen bonding affects the conductivity of CNTMPCs.
JOURNAL OF COMPOSITES SCIENCE
(2023)
Article
Engineering, Multidisciplinary
Zhong Hu
Summary: The research and development of composite materials with lighter, stronger, tougher, and multifunctional properties, particularly lattice structures, heterogeneities, or hybrid compositions, have gained significant interest in the materials research community. In this study, discontinuous carbon fiber-reinforced polymer matrix composite materials were utilized for structural design, incorporating a three-dimensional periodic lattice block inspired by cuttlefish bone and computer modeling-based topology optimization. The proposed method provides a design tool for affordable and high-performance structural materials, as evidenced by comparison with similar designs and experiments.
Review
Materials Science, Composites
Zhong Hu, Lin Wei
Summary: Biochar is a carbon-rich solid produced during biomass thermochemical processes, with advantages of low-cost and environmental friendliness. Traditional experimental methods for studying biochar properties are time-consuming and expensive. MD simulations based on ReaxFF offer an alternative and effective approach to characterize and predict the properties of biochar and analyze the biomass pyrolysis process.
JOURNAL OF COMPOSITES SCIENCE
(2023)
Article
Biochemical Research Methods
Weiyang Yang, Yan Gong, Cheng-You Yao, Maheshwar Shrestha, Yaoyao Jia, Zhen Qiu, Qi Hua Fan, Arthur Weber, Wen Li
Summary: Integrative neural interfaces combining neurophysiology, optogenetics, and neural imaging offer opportunities for studying neural circuits in the brain. The development of ultra-flexible, highly conductive and fully transparent microscale electrocorticogram (mu ECoG) electrode arrays with PEDOT:PSS-ITO-Ag-ITO assembly shows enhanced mechanical flexibility, robustness, and resilience to photon-induced artifacts. In vivo experiments demonstrate successful recording of light-evoked ECoG oscillations from the primary visual cortex (V1) of an anesthetized rat.
Article
Medicine, Research & Experimental
Madeline A. Mackinder, Keliang Wang, Bocong Zheng, Maheshwar Shrestha, Qi Hua Fa
CLINICAL PLASMA MEDICINE
(2020)
Article
Chemistry, Physical
Keliang Wang, Bocong Zheng, Maheshwar Shrestha, Thomas Schuelke, Qi-Hua Fan
ENERGY STORAGE MATERIALS
(2018)
