Article
Engineering, Mechanical
Pei Wang, Fengchun Wei, Zhiwei Zhao, Yonggang Guo, Sanming Du, Zhenhua Hao
Summary: By utilizing heat treatment and copper impregnation, the toughness and friction behaviors of carbon/carbon composites can be enhanced. With increasing heat treatment temperature, the flexural strength decreases and the failure mode changes. The increase in carbon crystal degree through heat treatment helps form a smooth tribolayer on the wear surface, leading to a decrease in friction coefficient and arc discharging frequency, and a shift in the main wear mechanism during current carrying friction tests.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Kejia Kang, Bo Yu, Guanyu Deng, Pei Wang, Jian Yin, Hongbo Zhang, Guoqiang Luo, Hao Song
Summary: This study fabricated a copper impregnated carbon/carbon composite for a novel sliding collector material, and investigated the effects of counterpart materials on friction and wear behaviors, comparing the results with carbon contact strip used in high-speed railway. The study found that the Cu-C/C composite exhibited superior mechanical strength, electrical conductivity, wear resistance, and friction performance compared to the pure carbon strip.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Coatings & Films
Xiaoqian Li, Congcong Wang, Aimin Liang
Summary: This study investigates the friction and wear behaviors of a Ta-based nanocrystalline composite coating fabricated by plasma spray under extreme sliding conditions. The results show that the coating achieves an extremely low wear rate (4.14 x 10(-8) mm(3)/N center dot m) under extreme friction conditions. The Ta-based coating exhibits improved anti-wear and friction reducing performance compared to hard chromium coating under the same extreme test conditions.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Engineering, Mechanical
Shi-Ping Cai, Yuan-Fu Liu, Zhi-Kun Song, Fu-Gang Lu, Zhuo Wu, Ming-Zhao Xie
Summary: Conventional rod pumping has been the dominant petroleum recovery technology for nearly a century. To improve the service life of sucker rod coupling and tubing, a Cr7C3 and CrxSy reinforced gamma-(Ni, Fe) matrix composite coating was designed and prepared. The coating exhibits excellent wear resistance and low friction coefficient, providing continuous lubrication and improving the service life of both sucker rod coupling and tubing.
Article
Engineering, Mechanical
Xingshuai Zhi, Ning Zhou, Yao Cheng, Xuyang Wang, Haifei Wei, Guangxiong Chen, Weihua Zhang
Summary: The causes of abnormal wear in the contact strip of the pantograph were investigated. Field data analysis revealed a strong correlation between strip wear rate and ambient humidity. Strip tests were conducted under different humidity conditions, and micro-morphology analysis showed the evolution law of wear rate. Grey relational analysis demonstrated that the correlation between different factors and wear rate was higher at low humidity than at high humidity. Based on these findings, it is concluded that abnormal wear of the strip is caused by a decrease in ambient humidity.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Engineering, Chemical
Xiaoqin Wen, Rong Qu, Feiyan Yuwen, Yanan Qiao, Tingmei Wang, Ruiqing Yao, Jinjun Lu
Summary: Graphene nanoplatelets (GNPs) are used to solve the problem of high friction coefficient and short wear lifetime for unlubricated Cu-on-Cu contact under electrical contact. GNPs are homogeneously deposited on polished (PS) and ground (PG) Cu substrates, producing a friction-induced Cu-GNP self-lubricating composite on worn PG Cu surface but not on worn PS Cu surface. The composite exhibits robust tribological properties, including a low friction coefficient and prolonged wear lifetime.
Article
Engineering, Mechanical
Beibei Chen, Yang Tong, Bi Yang, Jiaye Li, Wenquan Dong, Lin Zhang, Xianjuan Pang, Kan Zhang
Summary: This study focuses on improving the bonding strength between carbon fibers and polymer matrix in CF/polymer composites by constructing a micro/nano hierarchical structure at the interface. The results show that this interface construction method enhances the tribological performance and interlaminar shear strength of the composites. The findings suggest that the micro/nano hierarchical structure interface construction is a promising approach for enhancing the performance of CF/polymer composites.
Article
Materials Science, Multidisciplinary
Peifeng Li, Nesma T. Aboulkhair, Julan Wu, Kah L. Leng, Deyu Yang, Adam T. Clare, Xianghui Hou, Fang Xu
Summary: This study investigates the effect of interfacial reactions between Al and WS2 during composite production on tribological performance. The Al-WS2 fabricated at 580°C exhibited the lowest coefficient of friction and wear rate, while evidence suggests that a controlled amount of reaction products is beneficial for tribological properties.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Mechanical
K. Vishal, K. Rajkumar, V. E. Annamalai
Summary: By introducing reinforcement particles, the performance of high functionality PEEK composites was enhanced in terms of hardness, thermal stability, and wear characteristics. Under maximum loading conditions, the friction coefficient and specific wear rate were significantly reduced, showcasing improved tribological properties.
Article
Engineering, Mechanical
E. Simonetto, A. Ghiotti, M. Brun, S. Bruschi
Summary: Recent trends in sustainable mobility are increasing the complexity of stamping tools and control systems. The use of ferrofluid-based lubricants can simplify dies and improve stamping performances. However, the tribology of ferrofluids under magnetic field is still little investigated.
Article
Materials Science, Multidisciplinary
Jesus Lopez-Arenal, Bibi Malmal Moshtaghioun, Diego Gomez-Garcia, Angel L. Ortiz
Summary: The unlubricated wear behavior of a Zr3Al2-ZrB2 composite was studied. Scratch, fretting, and sliding tests were performed under varied loads, and the worn surfaces were characterized to identify wear modes and mechanisms. The results showed a ductile-to-brittle transition in scratch wear, resistance to fretting wear, and mild damage under sliding wear with increasing load.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Multidisciplinary
Mohammad Asraf Alif Ahmad, Mohd Ridzuan Mohd Jamir, Mohd Shukry Abdul Majid, Mohamad Reda A. Refaai, Cheng Ee Meng, Maslinda Abu Bakar
Summary: In this study, the damage self-sensing and strain monitoring of glass-reinforced epoxy composites impregnated with graphene nanoplatelets (GNPs) and multiwalled carbon nanotubes (MWCNTs) were investigated. The electrical properties and mechanical properties of the composites were improved by adding nanofillers.
NANOTECHNOLOGY REVIEWS
(2022)
Article
Chemistry, Physical
Sandeep Agrawal, Nishant K. Singh, Rajeev Kumar Upadhyay, Gurminder Singh, Yashvir Singh, Sunpreet Singh, Catalin I. Pruncu
Summary: The study investigated the tribological behavior of CNTs filled GFRP composites in various sliding environments and found that adding CNTs can increase wear resistance and reduce friction coefficient on hardened steel surfaces under different loading conditions. FESEM research confirmed the beneficial strengthening and self-lubrication properties of CNTs on GFRP composites.
Article
Chemistry, Physical
Haojie Lang, Yimeng Xu, Pengzhe Zhu, Yitian Peng, Kun Zou, Kang Yu, Yao Huang
Summary: Graphene as a solid lubricant at electrical contact interfaces exhibits ultra-low friction, ultra-high current stability, and effective wear resistance.
Article
Materials Science, Coatings & Films
Monty Kumar, Shakti Kumar, Kailash Jha, Amitava Mandal
Summary: In this study, a hard solid-lubricating clad layer was developed on a Ti-6Al-4V substrate using pre-placed powder TIG cladding technique to improve its mechanical, corrosion, and electrical discharge wear properties. The combination effect of Ti, Ni, and Si coating powders with different percentages of La2O3 in a N2 environment was investigated. The analysis revealed the presence of both hard (NiTi, TiO2, and TiAlN) and solid lubricating (LaNi5 and Si3N4) phases. The sub-surface analysis showed defect-free cladding with strong metallurgical bonds and refined microstructure near the interface. The coated samples exhibited significantly improved mechanical wear, corrosion resistance, and reduced electrical discharge wear, making them suitable for various applications.
SURFACE & COATINGS TECHNOLOGY
(2023)
