Article
Materials Science, Multidisciplinary
Jiaxing Wu, Jianxin Deng, Mingyuan Wang, Zhihui Zhang, Ran Wang, Yang Lu, Yichen Bao, Runzhou Tian
Summary: Ultrasonic surface rolling processing (USRP) is used to create textures on GCr15 substrates, and a PTFE-PPS/SiO2 coating is applied to enhance the friction and wear properties. The synergistic effect between the USRP textures and the coating is investigated, with the results showing that the linear texture with two processing times and the PTFE-PPS/SiO2 coating achieve the best performance. The shape and processing times of the textures, as well as the adhesion with the coating, are found to be important factors affecting the synergistic improvement.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Engineering, Mechanical
Xudong Zhao, Yimin Zhang
Summary: This study evaluates the ability of textured rolling bearings to capture and store contaminants in a lubricant-contaminated state. The results show that adding texture to the shaft washer raceway improves friction reduction and dynamic performance, as well as suppressing vibration energy in the medium and high frequency bands. The effectiveness of capturing contaminants is influenced by the diameter and area density of the pits.
Article
Engineering, Mechanical
Dmitrii Sergachev, David Matthews, Emile Van der Heide
Summary: This study investigates the creation of bidirectional friction using microscale ellipsoidal asperity textures, relying on the adhesive component of friction. Measurements showed higher friction coefficients perpendicular to the asperity major radii, with larger asperity dimensions leading to increased friction. Numerical analysis indicated that this effect is mostly related to elastic asperity deflection, and bidirectional friction differences can be controlled by asperity dimensions, spacing, and material properties.
Article
Nanoscience & Nanotechnology
Boya Li, Gao Cai, Xunzhang Li, Wenjing Sha, Xiaodong Shen, Tingwei Wang, Huaixia Zhao, Yangxin Wang, Jiaxi Cui
Summary: Researchers developed a switchable surface inspired by human fingertips, which exhibits high water sensitivity and surface variation in wet and dry states. The surface is constructed by utilizing the hygroscopicity of inorganic salt filler and 3D printing technology. Addition of fluorescent dye in the surface texture enables water-responsive fluorescent emitting, serving as a surface-tracing strategy. This switchable surface offers effective regulation of surface friction and demonstrates good anti-slip effects. The synthetic strategy reported provides a facile way for constructing a wide range of switchable surfaces.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Mechanical
N. Menga, F. Bottiglione, G. Carbone
Summary: We studied the dynamic behavior of a lattice of bristle-like elastic elements at the interface between a rigid still substrate and a rigid sliding slab. Complex bristles dynamics occur due to interactions with the moving slab, potentially altering the overall frictional response. Three main mechanisms of friction control were identified: modulation of local friction force based on relative velocity; misalignment between local relative velocity and slab velocity due to transverse vibration; and local friction coefficient variation due to normal load on the bristle. Results show that a significant reduction in friction force opposing slab motion can be achieved, depending on interface properties and involving self-excited bristle vibration. This research suggests possible mechanisms of friction control in different practical applications.
NONLINEAR DYNAMICS
(2023)
Article
Chemistry, Physical
Linqing Bai, Jianxin Sun, Pengcheng Zhang, Zulfiqar Ahmad Khan
Summary: This study investigates the frictional behavior of a textured surface against various materials, showing that the performance is influenced by texture parameters and the friction pair materials. Different surface textures, such as circular dimples and grooves, play a positive role in improving friction and wear performance under specific operating conditions for certain friction pairs, while no improvement is seen for others. The results provide insight for enhancing bearing element performance in complex interacting systems.
Article
Chemistry, Multidisciplinary
Pranjal Singh, Dharmender Singh Saini, S. P. S. Matharu, Anurag Sharma, Meshel Q. Alkahtani, Mohammad Amir Khan, Saiful Islam
Summary: Conventional greases have unique applications in lubrication and are difficult to replace with other substances. Nanoparticles, specifically graphene oxide (GO), as additives in greases show great scientific interest in improving the tribological properties. This study aims to synthesize a nanogrease using GO nanoparticles and lithium grease, resulting in enhanced tribological properties.
Review
Engineering, Mechanical
Zhiqiang Wang, Rihong Ye, Jinbo Xiang
Summary: This paper examines the importance of surface texture technology in reducing friction coefficient and enhancing friction performance. It provides an overview of the effects of textured shape, sliding speed, textured density, depth, and other factors on friction performance based on the research into the role of texture in reducing friction. The potential research directions for enhanced friction performance are also presented.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Engineering, Mechanical
Eduardo Tomanik, Laurent Aubanel, Michael Bussas, Francesco Delloro, Thomas Lampke
Summary: The tribological performance of a thermal sprayed, mirror-like surface with localized protuberances was studied through experiments and computational simulations. The presence of protuberances promoted the quick formation of an antifriction tribofilm, reducing the asperity friction in reciprocating tribological tests. Computer simulations showed that the protuberances reduced hydrodynamic friction by increasing the oil film thickness and reducing the oil film shear rate.
Article
Engineering, Civil
Andrzej Dzierwa, Pawel Pawlus
Summary: The main objective of the study was to model wear of a disc subjected to dry contact with a ball in unidirectional sliding. Tribological tests were conducted, showing that wear volumes of the discs were influenced by the roughness heights of the surfaces, with a strong correlation between modeled and measured wear levels.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2021)
Article
Engineering, Mechanical
Rita Ferreira, Oscar Carvalho, Luis Sobral, Sandra Carvalho, Filipe Silva
Summary: The radial surface coating layer of compression piston rings is used to improve wear resistance in internal combustion engines. However, the friction coefficient of the piston ring-cylinder liner pair at top dead centers negatively affects the engine's tribological performance. This study tested dimples with different texture dimensions and densities in a home-developed tribometer and found that the texture with an aspect ratio of 0.25 and a density area of 15% yielded the best tribological results.
Article
Engineering, Chemical
Zeda Chen, Zhibin Wu, Jianfang Sun, Chuan Mao, Fenghua Su
Summary: The composite coating of mGO/PTFE on the textured SS surface significantly improves the friction performance and wear resistance of the PTFE coating, especially showing better stability and prolonged lifespan under high load conditions.
Article
Engineering, Mechanical
Xiang Lin, Jinbang Li, Shuli Xie, Renliang Xia, Jinyang Liu, Limin Luo
Summary: In this study, micro-grooves were fabricated on 40CrNiMoA steel discs by laser texturing to improve its tribological properties and prolong its service life. The results show that the groove texture effectively enhances the tribological performance of the steel. However, increasing the groove width may lead to higher contact stress, resulting in increased friction and wear.
SURFACE TOPOGRAPHY-METROLOGY AND PROPERTIES
(2022)
Article
Engineering, Mechanical
Huabing Yin, Xuecheng Zhang, Zhiwei Guo, Yicong Xu, Xiang Rao, Chengqing Yuan
Summary: This study investigated the synergistic effects of surface textures and lubricant additives on the tribological properties of the cylinder liner-piston ring (CLPR) in diesel engines. Two forms of surface texture were prepared on the liner surface using laser processing, and modified copper nanoparticles were used as lubricant additives. The results showed that the composite lubrication system exhibited good friction-reduction and wear-resistance when the appropriate texture was adopted. Additionally, the synergistic effects between the storage capability of textures and the self-repairing ability of CNP additives explained the improvement mechanism of CLPR's tribological properties.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Engineering, Manufacturing
Jiaxing Wu, Jianxin Deng, Yang Lu, Zhihui Zhang, Ying Meng, Ran Wang, Qinghao Sun
Summary: Linear and cross textures with different processing stepovers were fabricated on GCr15 steel surface using ultrasonic surface rolling processing (USRP). The effects of texture shape and processing stepover on dry friction and wear performance were investigated. The results showed that USRP texturing samples had improved friction and wear performance due to the strengthened substrate, reduced contact area, and entrapment of wear debris.
JOURNAL OF MANUFACTURING PROCESSES
(2022)