Article
Engineering, Mechanical
Sifat Ullah, Faysal M. Haque, Mark A. Sidebottom
Summary: Reinforcing fillers can significantly reduce the wear rate of PTFE, with a certain type of alpha-alumina particles achieving an ultralow wear rate. However, alpha-Al2O3 can also increase the friction coefficient of PTFE. PTFE composites with Cr, Mn, and Ti showed improved performance in reducing wear rate and friction coefficient compared to PTFE-alpha-Al2O3.
Article
Engineering, Mechanical
Julian Somberg, Prabakaran Saravanan, Hari Shankar Vadivel, Kim Berglund, Yijun Shi, Jan Ukonsaari, Nazanin Emami
Summary: The study found that using environmentally friendly lubricants can significantly reduce friction, while using water can increase wear for most materials. Under different lubricating conditions, the PPS composite material demonstrated superior tribological properties.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Engineering, Mechanical
Wei Sun, Xiaojun Liu, Kun Liu, Yan Zhang, Yunxiang Lu, Jiaxin Ye
Summary: This study confirms that a mechanistic synergy involving both load support ability and the induction of favorable tribochemistry is necessary for ultralow wear PTFE composites. The only filler that induced ultralow wear in the study was micron-sized GaN fiber which was friable under shear stresses.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Polymer Science
Kylie E. Van Meter, Christopher P. Junk, Kasey L. Campbell, Tomas F. Babuska, Brandon A. Krick
Summary: PTFE-PEEK and polytetrafluoroethylene (PTFE)-alpha-alumina composites exhibit remarkably low wear rates in a self-mated configuration. IR spectroscopy analysis indicates that the self-mated PTFE-PEEK composites accumulate more PEEK at the sliding interface and show more expression of a tribochemical carboxylate species. The self-mated PTFE-PEEK composites rely on the formation and stability of tribofilms, while the filled PTFE outperforms when PEEK is used as the filler.
Article
Polymer Science
Alexander Poellinger, Thomas Koch, Stefan Krenn, Fabian Wilde, Domonkos Tolnai, Bernhard Plank, Sarah Heupl, Johannes Bernardi, Karin Whitmore, Marc Langela, Sandra Seichter, Michael Schoebel
Summary: Efficient transport of hydrogen is crucial for the widespread adoption of renewable energy. Reciprocating piston compressors with high strength non-lubricated sealing solutions are key technologies to meet the demands for gas purity and high-pressure gradients in hydrogen applications.
Article
Polymer Science
Anun Wongpayakyotin, Chanchira Jubsilp, Sunan Tiptipakorn, Phattarin Mora, Christopher W. Bielawski, Sarawut Rimdusit
Summary: A series of substituted polybenzoxazines were synthesized and studied as binders in non-asbestos friction composite materials. By varying the structure of polybenzoxazines, composite friction materials with different properties were obtained. Higher crosslink densities in polybenzoxazines resulted in composite friction materials with better thermomechanical and wear resistance properties, while lower crosslink densities led to materials with improved coefficient of friction values and specific wear rates.
Article
Engineering, Environmental
Shuang Yi, Jinjin Li, Jinsong Rao, Xiaoyang Ma, Yuxin Zhang
Summary: The friction and wear of mechanical components are the main factors that reduce the lifetime and cause energy loss. This study successfully achieved superlubricity on engineering steel surfaces using alkyl-functionalized black phosphorus (BP) nanosheets as lubricating additives. The coefficient of friction (COF) of PAO with the alkyl-functionalized BP additives reduced to 0.006, reducing by more than 90% compared to the absence of functionalized BP. The formation of a composite tribofilm mainly consisting of phosphorus oxides and silicon oxides provided an extremely low shear strength, resulting in a superlubricity state.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Mechanical
Qihua Wang, Xiaoyue Wang, Xinrui Zhang, Song Li, Tingmei Wang
Summary: The tribological properties of materials have a complex and non-linear correlation under varying operational conditions. Therefore, using a data-driven approach to predict service capability is crucial for advancing material design and preparation in the field of tribology. In this investigation, the tribological performance and wear mechanism of PTFE composites were analyzed, and machine learning techniques were employed to predict tribological properties under different operational conditions. The gradient boosting regression (GBR) model showed excellent predictive performance, with R2 values of 82% and 91% for friction coefficient and wear rate, respectively. Furthermore, the Pearson correlation coefficient indicated that temperature and speed have a greater impact on friction coefficient and wear rate compared to load.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Engineering, Mechanical
Jiang Wei, Wei Sun, Kun Liu, Xiaojun Liu, Kaisen Zhang, Qing Zhang, Jiaxin Ye
Summary: Prior studies have shown that mechanical interlocking, preferential adhesion, and PTFE tribochemistry all play a role in reducing wear in polar polymer-filled PTFE composites, but their relationships are poorly understood. This study aimed to investigate the wear and tribofilm environmental sensitivities of a 5 wt% polyamide-imide (PAI) filled PTFE composite to untangle these mechanisms. The results revealed a strong correlation between a carboxylate-salt-rich transfer film and ultralow wear, as well as a tribochemical interface gradient that discourages transfer film removal. It is proposed that PTFE tribochemistry induces ultralow wear through increased transfer film adhesion and cohesion, promoting a surface energy interface gradient beneficial to low wear.
Review
Chemistry, Multidisciplinary
Jiaqi He, Huajie Tang, Chenglong Wang
Summary: In recent years, molecular dynamics (MD) simulation has emerged as an effective tool for studying tribology and lubrication, providing unique insights at the atomic scale. This review paper provides an overview of recent MD simulation studies on friction laws, wear mechanisms, and lubrication performance, aiming to guide future theoretical investigations. The summary focuses on various areas such as friction and wear mechanisms, nano-tribology, liquid lubricants, lubricant additives, and superlubricity phenomenon. The challenges, problems, and future directions of MD simulation are also briefly discussed.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Engineering, Manufacturing
Qingguang Bao, Nan Li, Jingyao Feng, Shebin Yan, Gaozhang Ma, Bing Wang, Shan Cheng, Haoyue Hao, Cheng Liu, Shouhai Zhang, Yousi Chen, Xigao Jian
Summary: A mixture design approach was used to model and optimize the tribology properties of PPESK composites. By adjusting the mass fractions of the materials, the friction coefficient and wear rate were significantly reduced. Additionally, the composites exhibited excellent mechanical and high temperature properties.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Engineering, Multidisciplinary
Jing Chen, Jiaming Zhu, Qianzhu Li, Hong Wu, Shaoyun Guo, Jianhui Qiu
Summary: In this study, the wear resistance of materials under harsh PV conditions was improved by introducing plasma-treated UHMWPE and constructing a 3D interconnected CNTs network in PA6 composites. The incorporation of these materials reduced the COF of PA6 significantly and improved the heat dissipation properties.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Engineering, Mechanical
Frank W. DelRio, Filippo Mangolini, Camille E. Edwards, Tomas F. Babuska, David P. Adams, Ping Lu, John F. Curry
Summary: Nanocrystalline metal alloys, especially platinum-gold (Pt-Au) alloys, have shown great promise as electrical contact materials due to their low coefficients of friction and specific wear rates. This study explores the structure-property relations and growth mechanisms of Pt-Au tribofilms as a function of composition. The addition of Au leads to a decrease in grain size and an increase in grain boundary segregation, resulting in a decrease in modulus and an increase in hardness. The presence of Au also leads to decreased friction and wear rates, with high Au-content films showing stable tribofilm growth.
Article
Materials Science, Multidisciplinary
Jing Chen, Jiaming Zhu, Yang Pan, Hong Wu, Shaoyun Guo, Jianhui Qiu
Summary: Highly oriented hybrid networks of silicon carbide (SiC)-packed boron nitride (BN) platelets were constructed by applying a strong extensional and shearing field, resulting in high-performance wear resistant PA6 composites. The prepared composites exhibited significantly improved in-plane and through-plane thermal conductivity compared to pure PA6. Furthermore, the composites showed increased yield strength, excellent ductility, and reduced wear rate. This method has great potential for manufacturing advanced components like linear bearings and guideways.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Mechanical
Santosh Kumar, Nikhil Sharma, K. K. Singh
Summary: In this study, glass fibre reinforced polymer (GFRP) composites and GFRP composites incorporated with 0.5 wt% and 1 wt% of graphene nano-platelets (GNPs) were prepared using hand lay-up method and compression moulding. Tribological testing was conducted under dry-sliding conditions, and the Artificial Neural Network (ANN) technique was used to analyze the experimental data. The results showed that the ANN predicted the output parameters with a high accuracy and the wear mechanisms were examined using FESEM and EDS analysis.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Materials Science, Composites
Wenli Zhang, Xiaowen Qi, Xiaocui Yan, Yu Dong, Changxin Liu, Bingli Fan
Summary: In this study, PA6 was modified using nickel shell microcapsules and short fibers to prepare bearings with excellent performance. The addition of microcapsules reduced the coefficient of friction, while the application of fibers effectively prevented bearing failure, ensuring the effective lubrication of microcapsules and the formation of high-quality transfer film.
POLYMER COMPOSITES
(2022)
Article
Engineering, Mechanical
Wendy Triadji Nugroho, Yu Dong, Alokesh Pramanik
Summary: This study investigates the dimensional accuracy of printed polyurethane dog-bone samples using FDM. The research reveals that layer height has the most significant impact on dimensional accuracy and surface finish, while infill density shows no significant effect on sample dimensions. This comprehensive study aims to improve printability and processibility in additive manufacturing.
RAPID PROTOTYPING JOURNAL
(2022)
Article
Materials Science, Coatings & Films
Ziyue Qi, Song Zhao, Xiaowen Qi, Yu Dong
Summary: This study investigated the effects of voltage and pulse frequency on the tribological properties of tungsten-strengthened layers on TC4 titanium alloy surfaces via electro-spark alloying. The results showed that the strengthened TC4 surfaces had a main tungsten phase with typical sputtering characteristics. The strengthened layers had significantly increased thickness and microhardness compared to TC4, resulting in reduced friction coefficient and wear loss.
SURFACE ENGINEERING
(2022)
Article
Engineering, Mechanical
Hai Wang, Annan Sun, Xiaowen Qi, Yu Dong, Bingli Fan
Summary: This study investigates the application of laser surface texturing on two types of textured lubricant films, which can reduce friction coefficient and enhance tribological properties.
TRIBOLOGY INTERNATIONAL
(2022)
Review
Materials Science, Multidisciplinary
Hung Dang Nguyen, A. Pramanik, A. K. Basak, Y. Dong, C. Prakash, S. Debnath, S. Shankar, I. S. Jawahir, Saurav Dixit, Dharam Buddhi
Summary: This investigation compares electron beam melting (EBM), selective laser melting (SLM), and directed energy deposition (DED) as additive manufacturing (AM) techniques for producing titanium alloy parts. The study examines the differences in microstructure, tensile properties, porosity, surface roughness, and residual stress among these methods. It concludes that the choice of AM process affects the material's characteristics, and additional treatments such as annealing and stress relief can improve the performance of AM-fabricated parts.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Engineering, Mechanical
Wenli Zhang, Xiaowen Qi, Xiao Yang, Yu Dong, Bingli Fan, Lei Liang
Summary: Novel Ni-PSF@PAO40 microcapsules with high stability were prepared using a combined processing method. These microcapsules exhibited excellent chemical and thermal stability, and when embedded into polyamide 6, they significantly improved the microhardness and reduced the coefficient of friction and wear rate of the composite material.
Review
Engineering, Multidisciplinary
Khor Zheng Yang, A. Pramanik, A. K. Basak, Y. Dong, Chander Prakash, S. Shankar, Saurav Dixit, Kaushal Kumar, Nikolai Ivanovich Vatin
Summary: This study provides a critical review of the application of coolant in machining processes. It discusses the mechanisms, functions, types, cooling actions, effectiveness, applications, and additives of coolants, as well as the introduction of cryogenic machining using cryogenic gases as coolants.
AIN SHAMS ENGINEERING JOURNAL
(2023)
Article
Polymer Science
Soheila Mohammadzadehmoghadam, Catherine F. LeGrand, Chee-Wai Wong, Beverley F. Kinnear, Yu Dong, Deirdre R. Coombe
Summary: The study illustrates the potential applications of SF/HNT 1 wt% composite scaffolds in soft tissue repair and primary human keratinocyte expansion for skin regeneration. These scaffolds not only promote cell growth and differentiation, but also contribute to the formation of intact cell monolayers with undifferentiated basal cell phenotype.
Article
Chemistry, Multidisciplinary
Jun Li, Dongyan Liu, Junsheng Li, Fei Yang, Guoxin Sui, Yu Dong
Summary: This study discovered the novel morphology of cellulose nanofibers with a unique tree-branched structure through acid hydrolysis assisted with pre-disintegration treatment. The disintegration treatment resulted in longer fiber length, more evident tree-branched structures, and lower crystallinity of the nanocellulose. Additionally, the disintegration treatment improved the tensile strength of the nanocellulose films.
Article
Engineering, Mechanical
Gaifen Lu, Xiao Yang, Xiaowen Qi, Xiaocui Yan, Yu Dong, Weigang Yao, Lei Liang
Summary: By adding oil-containing microcapsules, the modified composite liner showed the best tribological properties in plane friction tests, with a significant decrease in average friction coefficient and wear rate.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Materials Science, Composites
Xiaocui Yan, Shifa Pang, Xiaowen Qi, Gaifen Lu, Yu Dong, Changxin Liu, Bingli Fan
Summary: In this study, microcapsules with different wall materials were prepared and applied for surface modification of liners. The results showed that microcapsules with different wall materials could significantly improve the anti-friction and wear resistance properties of liners, with SiO2 as the wall material enhancing the wear resistance of transfer films.
POLYMER COMPOSITES
(2023)
Article
Chemistry, Multidisciplinary
Wendy Triadji Nugroho, Yu Dong, Alokesh Pramanik, Zhixiao Zhang, Seeram Ramakrishna
Summary: This paper focuses on the co-influence of HNT content and 3D printing parameters on the mechanical properties of 3D printed TPU/HNT nanocomposites. The optimum factor-level combination for different responses was determined with the aid of robust statistical Taguchi design of experiments. Material characterisation was also carried out to evaluate the surface morphology, nanofiller dispersion, chemical structure, thermal stability, and phase behaviour corresponding to the DoE results obtained. It is evidently shown that HNT level and infill density play a significant role in impacting mechanical properties of 3D-printed TPU/HNT nanocomposites.
Article
Materials Science, Multidisciplinary
Song Zhao, Haoran Zhang, Xiaowen Qi, Yu Dong, Yan Zhang
Summary: This study focuses on the wear problem of TiN coating on the surfaces of self-lubricating spherical plain bearings based on titanium alloys. Through ring-to-plate wear tests and swing tests, the tribological properties of TiN coating and applicable working conditions were evaluated. The results showed that TiN coatings can maintain a certain friction distance without wear, but increasing friction speed and load can make them more prone to wear. The main wear mechanism is fatigue wear induced by the repeated formation and peeling of transfer films. The GE15 bearing achieved a self-lubricating fabric wear of approximately 0.04 mm under specific conditions, making it suitable for swing conditions with applied loads below 27 kN.
Review
Engineering, Manufacturing
Wendy Triadji Nugroho, Yu Dong, Alokesh Pramanik, M. Chithirai Pon Selvan, Zhixiao Zhang, Seeram Ramakrishna
Summary: This paper provides a comprehensive review on the manufacturing, design, and unique properties of re-entrant structures. Modelling approaches and real applications of these structures are also discussed.
ADDITIVE MANUFACTURING
(2023)
Review
Engineering, Manufacturing
Kimberley Rooney, Yu Dong, Alokesh Pramanik, Animesh Kumar Basak
Summary: The introduction of additive manufacturing (AM) in Australian small and medium-sized enterprises has made Australian manufacturing more competitive in global markets by saving time and reducing costs, and meeting diverse customer demands. This review discusses typical AM techniques used in Australian manufacturing and presents a practical case study, as well as addressing the challenges and future prospects of AM.
JOURNAL OF MANUFACTURING AND MATERIALS PROCESSING
(2023)
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)
