Article
Chemistry, Physical
Jiahao Li, Yong Peng, Xianqiong Tang, Bo Liu, Lichun Bai, Kun Zhou
Summary: The excellent friction properties of graphene are degraded by defects, but can be improved by hydrogen passivation, reducing chemical activity and increasing the critical load for covalent bond formation. Friction reduction of hydrogen-passivated defective graphene is influenced by atomic-level surface roughness and chemical inertness. This study presents a novel approach to controlling lubrication performance of graphene-based nanomaterials with defects in mechanical applications.
APPLIED SURFACE SCIENCE
(2022)
Article
Thermodynamics
Yan Chen, Jing Wan, Yang Chen, Huasong Qin, Yilun Liu, Qing-Xiang Pei, Yong-Wei Zhang
Summary: The interlayer thermal resistance (ITR) in multilayer graphene can be effectively controlled by in-plane defects and crosslinks. In-plane defects enhance phonon scattering and increase the ITR, while crosslinks provide a fast phonon transmission pathway and decrease the ITR.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Paolo F. Ferrari, SunPhil Kim, Arend M. van der Zande
Summary: The study found that different types of graphene membrane resonators have different dissipation characteristics, with monolayer graphene having the highest average quality factor. Dissipation in graphene membranes is mainly affected by changes in stiffness and additional dissipation from interlayer friction. This has important implications for nanoelectromechanical systems (NEMS) based on two-dimensional heterostructures.
Article
Nanoscience & Nanotechnology
Mengxi Chen, Asanka Weerasinghe, Andre R. Muniz, Ashwin Ramasubramaniam, Dimitrios Maroudas
Summary: A systematic computational analysis was conducted on the mechanical and structural response of nanodiamond superstructures in interlayer-bonded twisted bilayer graphene to indentation loading. The superstructures exhibit strong nonlinear inelastic response and high elasticity, with fracture initiation influenced by relative twisting. The strength decreases with increasing nanodiamond content, but remains high even at high values.
ACS APPLIED NANO MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Kun Cai, Zixu Zhang, Lei Wang
Summary: This study investigates the energy loss issue of hydrogenated graphene networks and identifies two reasons for the energy loss. The findings contribute to the potential application of nanonetworks in nanodevices.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Jianzhang Huang, Shuang Gan, Yi Cai, Yijie Liu, Yingjing Liang
Summary: This study investigates the mechanism of dynamic sliding friction between layers of graphene and its strain effect. The research explores the effects of temperature, normal load, sliding velocity, support stiffness, and axial strain on the friction between graphene layers. The results indicate that the interlayer friction increases with normal load and is initially enhanced at higher sliding velocities, but is later reduced by severe residual deformation and lattice resonance frequency. The support stiffness regulates interlayer friction by affecting the atomic vibration amplitude of the graphene lattice.
NANOTECHNOLOGY REVIEWS
(2023)
Article
Chemistry, Physical
Chen Chen, Fang Huang, Lingjie Jia, Li Zhang, Eryu Chen, Lijun Liang, Zhe Kong, Xinping Wang, Wei Zhang, Jia-Wei Shen
Summary: This study investigates the effect of interlayer spacing and hydrophilicity on the desalination performance of multilayer graphene-based membranes. It was found that water flux increased with decreasing hydrophilicity, and rejection rate was mainly determined by the effective distance of interlayer spacing.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Materials Science, Multidisciplinary
Yifan Zhao, Fan Wu, Yue Zhao, Xiaodong He, Chao Sui, Chao Wang, Huifeng Tan
Summary: This study introduces a novel nano-repair strategy using interlayer cross-linkings as glue to repair defective graphene, improving its mechanical properties. The research shows that the optimal repair efficiency can reach 1.87, and the shape of the patch also plays a significant role in repair efficiency.
COMPUTATIONAL MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Sulin Chen, Bin Shen, Zhewei Huang, Zhe Ji, Qiang Lin, Zhinan Zhang
Summary: The study revealed the impact of substrate deformation on the friction behavior of graphene through molecular dynamics simulations. Despite the elastic nature of substrate deformation, a pinning effect on the tip occurs within the deformed region, resulting in increased friction.
COMPUTATIONAL MATERIALS SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Chaochen Xu, Shuai Zhang, Hongzhi Du, Tao Xue, Yilan Kang, Yang Zhang, Pei Zhao, Qunyang Li
Summary: Research has shown that the frictional characteristics of graphene can be adjusted by applying strain. In an experiment where graphene is deposited onto a stretchable substrate, it was found that the friction of supported graphene decreases with increasing strain, but the system shows two distinct friction regimes with significantly different strain dependences depending on the adherence state of the graphene/substrate interface.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Chaochen Xu, Shuai Zhang, Hongzhi Du, Tao Xue, Yilan Kang, Yang Zhang, Pei Zhao, Qunyang Li
Summary: Graphene has shown great potential as a surface friction modifier due to its excellent mechanical performance and tribological properties. This study investigates the frictional characteristics of supported graphene under different strains by depositing the graphene on a stretchable substrate and using an in situ tensile loading platform. The experimental results reveal that the friction of supported graphene decreases with increasing strain, similar to suspended graphene. However, the system exhibits two distinct friction regimes depending on the adherence state of the graphene/substrate interface, indicating different strain dependences.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Mingjie Tong, Yan Jiang, Liya Wang, Chengyuan Wang, Chun Tang
Summary: The study reveals that nanoporous graphene exhibits unique frictional characteristics, with the size of the nanopore playing a key role in determining the maximum frictional force. Negative friction is observed when the silicon tip scans towards the center of the nanopore.
Article
Chemistry, Multidisciplinary
Hongwei Zhang, Yanwei Li, Jinfeng Qu, Jingnan Zhang
Summary: This study uses molecular dynamics simulations to investigate the relationship between nanoscale friction between incommensurate graphene layers and edge size, showing that the edge size significantly affects friction force. The equivalent friction force is linearly proportional to edge size.
Article
Chemistry, Physical
Wei Cao, Oded Hod, Michael Urbakh
Summary: Inspired by the fascinating electronic properties of twisted transition metal dichalcogenides, this study extends the registry index approach to quantify the interlayer commensurability of homogeneous and heterogeneous interfaces of MoS2, WS2, MoSe2, and WSe2. The developed geometric measure provides quantitative information about their sliding energy landscape with mechanical and tribological implications. Furthermore, the registry index is highly suitable for characterizing surface reconstruction in twisted transition metal dichalcogenide interfaces, which determines their intricate electronic and ferroelectric properties.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Thermodynamics
Chao Li, Jie Wang, Yunhe Sheng, Lina Yang, Yu Su
Summary: In this study, the strain effect on the interfacial thermal resistance between graphene and silicon was investigated through molecular dynamics computation. It was found that the interfacial thermal resistance gradually increases with the increase of tensile strain in graphene within a certain range, mainly due to the decrease in the overlap of vibrational density of states between graphene and silicon. However, there is no monotonic increase in the interfacial thermal resistance with the overall tensile strain applied on both graphene and silicon. The results also showed that the interfacial thermal resistances under various residual tensile strains gradually decrease and converge as the compressive strain increases, and the out-of-plane motion dominates the interfacial heat conduction.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Engineering, Mechanical
Busra Duran, Jerome Cavoret, David Philippon, Fabrice Ville, Arnaud Ruellan, Frank Berens
Summary: This study analyzes the changes in the physicochemical properties and tribological performances of gear transmission oils during field operation, finding differences from traditional engine oils.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Baocheng Liu, Hongsheng Chen, Jun Zhou, Jing Wang, Wenxian Wang, Xiaochun Chen, Sanxiao Xi
Summary: This study used fast hot pressing sintering to fabricate WC/AlCoCrFeNi2.1 metal matrix composites (MMCs). It was found that the addition of reinforced particles increased the microhardness, nanoindentation and wear resistance of the MMCs. During frictional processes, an oxide film formed, providing material protection, enhancing stability and reducing friction-induced losses.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Pradip Kumar Verma, Alok Singh
Summary: This study investigates the mechanical properties and wear resistance of CoMoMnNiV high entropy alloy reinforced aluminium matrix composite processed through stir-squeeze casting assisted with an ultrasonic transducer. The results show significant improvements in mechanical properties and wear resistance, with the composite containing 8 wt% HEA demonstrating the highest resistance to wear. Optical microscopy, SEM, and an optical profilometer were used for a thorough examination of the microstructure and worn surface.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Zhenghai Yang, Yingjian Song, Jinlong Jiao, Wenbo Li, Bao Shangguan, Yongzhen Zhang
Summary: This study investigated the friction, wear properties, and current-carrying properties of copper-graphite composites paired with brass C28000. The results showed that the current-carrying properties of the composite materials were excellent, but their wear rate was the main limiting factor. Furthermore, an increase in the thickness of the graphite layer led to an improvement in the uniformity of damage.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Moustafa Mahmoud Yousry Zaghloul, Karen Steel, Martin Veidt, Michael T. Heitzmann
Summary: This research evaluates and compares the impact of different material types on the tribological characteristics of Polyamide 6 composites, and finds that glass fiber-reinforced Polyamide 6 exhibits better friction and wear performance under high-pressure velocity factors.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Shaoqing Qin, Lida Zhu
Summary: In this paper, the surface and subsurface damage of laser assisted grinding CrCoNi medium entropy alloys were investigated using molecular dynamics simulations. The results showed that the application of laser energy can reduce cutting forces and minimize subsurface damage.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Kaikui Zheng, Youxi Lin, Tingzheng Lai, Chenghui Gao, Ming Liu, Zhiying Ren
Summary: The study investigated the use of waste foundry resin-bonded sand as a substitute for copper in resin-based brake material. It found that the waste sand was more favorable for improving the overall friction and wear properties of the material compared to copper. Waste sand benefited the material by forming a friction layer, leading to increased friction coefficient and stability. Brake material with 10-15% waste sand showed excellent heat-fade resistance.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Dayang Li, Fanhao Zhou, Yutong Gao, Kun Yang, Huimin Gao
Summary: This article introduces a continuous prediction model based on deep learning for predicting the power output of steam turbines. The model uses long short term memory (LSTM) method to develop a trend prediction model and optimizes the prediction model through feature selection method. Experimental results show that the model outperforms other models in terms of prediction performance.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Tomohiro Toyoda, Ryo Yasuike, Toshihiro Noda
Summary: In this study, a elasto-plastic constitutive model of friction incorporating the concept of superloading surface was developed based on the subloading friction model. The proposed model achieves a smooth transition of friction by describing the evolution rule of structure, treating the state with static friction coefficient larger than kinetic friction coefficient as the bulkiness of structure. The positive definiteness of the plastic multiplier, loading condition, and material parameters were derived, and the validity of the proposed model in accordance with the subloading-friction model was confirmed through a stick-slip simulation of a mass-spring system.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
P. Balaji, B. Surya Rajan, K. Sathickbasha, P. Baskara Sethupathi, Deviga Magadevan
Summary: This study emphasizes the importance of using a variety of solid lubricants with different oxidation temperature regimes to enhance the tribological performance of brake pads.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Jian Ma, Yancong Liu, Javad Mostaghimi, Na Zhang
Summary: This paper investigates the influence of preparation strategies on the lubrication properties of surface textures. Three laser scanning strategies are proposed to achieve a sinusoidal textured surface, and the evolution of surface structure and chemical composition is discussed. The findings show that ridge structures enhance anti-wear properties but also increase the friction coefficient. However, the oil cover preparation method prevents the formation of ridges and improves wettability.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Mohammad Roostaei, Arvin Taghizadeh Tabrizi, Hossein Aghajani
Summary: In this research, the Al2O3/MoS2 nanocomposite coating layer was successfully applied on the surface of Ti-6Al-4 V alloy. The relation between the surface characteristics and wear resistance of the coating was studied using atomic force microscopy analysis and pin-on-disk wear test method. The results showed that the nanocomposite coating significantly reduced the wear rate and provided an equation to calculate the Lancaster coefficient.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Musa Bilgin, Sener Karabulut, Halil Karakoc, Yunus Kayir, Murat Sarikaya
Summary: This study investigates various methods to improve the machinability efficiency of Inconel 718 alloy while considering their effect on microstructural properties. The results show that hot+PMQL, hot+SiCNMQL, and hot+Al2O3-NMQL contribute significantly to the improvement of machinability characteristics. The EBSD analysis also reveals that a limited area is affected by heat in the hot machining environment and that the removal of the heated layer during milling process helps preserve the microstructure.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Q. Gao, Y. Fan, Y. G. Wu, J. L. Liu, J. Wang, L. Li
Summary: Fretting wear significantly affects the hysteresis behavior of the contact surface and leads to joint degradation. This study investigates the influence of harmonic normal force on the evolution of interface morphology and contact parameters with fretting wear. The results show that the harmonic normal force can significantly influence the hysteresis loop and the energy dissipation distribution on the contact surface.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Benjamin Weiland, Floriane Leclinche, Anis Kaci, Brigitte Camillieri, Betty Lemaire-Semail, Marie -Ange Bueno
Summary: This study presents a systematic approach to generating control signals for a tactile simulator that simulate the touch of textile fabrics. By using a friction modulation tactile surface and acquiring forces from real surfaces with artificial finger mimicking fingerprints, control signals are generated and processed in the frequency domain before sending them to the tactile stimulator. The study focuses on the potential benefits of incorporating fingerprint information in fabric simulations to achieve a more realistic tactile perception. A sensory analysis with 36 participants using the generated control signals showed better discrimination without fingerprint information.
TRIBOLOGY INTERNATIONAL
(2024)