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)
Article
Materials Science, Ceramics
Heng Liu, Duanzhi Duan, Qijing Lin, Chenying Wang, Zhuangde Jiang
Summary: In this study, a novel method of developing metal-bonded diamond tools using Cu-Sn-Ti alloy and glass fibers was proposed. The bending strength and microhardness of the diamond segments were tested, and the microstructures were investigated. The results showed that an appropriate amount of glass fibers can improve the bonding strength, while excessive glass fibers can decrease the wear resistance of the diamond segments.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Khansaa Dawood Salman, Wisam Abed Kattea Al-Maliki, Falah Alobaid, Bernd Epple
Summary: This study aims to investigate the microstructure and mechanical properties of an Al matrix incorporated with various amounts of Fe2O3 and a constant amount of Ag. The results show that Fe2O3 and Ag nanoparticles are uniformly distributed in the Al matrix, and the addition of 12 wt.% Fe2O3 + 1Ag significantly enhances the micro-hardness and compressive strength, while reducing the wear rate to a minimum.
APPLIED SCIENCES-BASEL
(2022)
Article
Mathematics, Interdisciplinary Applications
Xingya Ni, Jianjun Sun, Chenbo Ma, Yuyan Zhang
Summary: In this research, a model incorporating piecewise fractal theory is proposed for accurately calculating wear in a contact mechanical seal. The model shows improved accuracy compared to conventional models and is validated through comparison with experimental data. The study also analyzes the effect of loading and surface morphology parameters on wear, finding that severe wear is influenced by increasing load ratio and specific surface characteristics. These findings offer a novel method for predicting and calculating wear in contact mechanical seals.
FRACTAL AND FRACTIONAL
(2023)
Article
Chemistry, Multidisciplinary
Hamidreza Ghandvar, Mostafa Abbas Jabbar, Seyed Saeid Rahimian Koloor, Michal Petru, Abdollah Bahador, Tuty Asma Abu Bakar, Katsuyoshi Kondoh
Summary: The study investigated the effects of different B4C additions on an Al-20%Mg2Si composite, revealing that adding up to 10 wt% B4C improved the microstructure, mechanical, and tribological properties of the composite. The optimal performance was achieved with 5% B4C addition, leading to a reduction in particle size and improvements in wear resistance and mechanical properties.
APPLIED SCIENCES-BASEL
(2021)
Article
Materials Science, Multidisciplinary
Haichao Yang, Shuangxi Li, Runmei Ma, Guoqing Zhang, An Liu
Summary: This study proposes a high-performance composite material that introduces carbon nanotubes (CNTs) into the laser-melted Cr coating to improve the reliability of high-temperature mechanical seal end faces. Friction and wear tests were conducted under different working conditions and using different end face materials, and the high-temperature tribological properties of the Cr-CNTs coatings were analyzed. The results show that the wear resistance of the Cr-CNTs coating at high temperatures is enhanced with the increase in CNTs content, and the presence of CNTs favors the generation of a graphite film, reducing the coefficient of friction.
Article
Construction & Building Technology
Nanxiang Zheng, Jiefu Bi, Shi Dong, Junan Lei, Yongtai He, Zhiwei Cui, LiGuang Chen
Summary: This study investigated the skid resistance performance of four seal schemes and established the relationship between texture characteristic parameters and skid resistance index, as well as proposed a prediction model for skid resistance deterioration. The composite seal structure can reduce the rate of skid resistance index decrease, and parameters such as Spd, Spc, and Vmc showed good correlation with skid resistance.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Mechanics
Yuansen Song, Shaoxian Bai, Jing Yang, Junjie Chen
Summary: This paper presents a compressible cavitation model to study the effect of fluid cavitation intensity on zero-leakage flow. The results show that cavitation has a negative impact on sealing performances, but the groove's configuration and working conditions can control the cavitation intensity. It is also important to consider the formation of a circumferential continuous pressure ring for judging strict zero leakage.
INTERNATIONAL JOURNAL OF APPLIED MECHANICS
(2023)
Article
Chemistry, Physical
Yanlin Cai, Yonggang Tong, Yongle Hu, Hongfeng Huang, Xiancheng Zhang, Manyu Hua, Shan Xu, Yongbing Mei, Chengbiao Ma, Zhifeng Li
Summary: The addition of TiC improved the mechanical properties and wear resistance of CoCrNi alloy, with the wear resistance of CoCrNi/(TiC)(x) composites increasing with the increasing content of TiC addition.
Article
Engineering, Mechanical
D. Almonti, G. Baiocco, E. Menna, E. Mingione, G. Rubino, N. Ucciardello
Summary: This paper characterizes and improves different Cu-GnPs coatings produced through electroplating on a copper substrate. The results show that the reinforced coatings exhibit higher wear performance compared to pure copper coatings. The authors suggest that the graphene sheets establish a graphitic transfer film between the friction pair, providing lubrication and protecting the surface from wear.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Materials Science, Multidisciplinary
Shashi Prakash Dwivedi, Shubham Sharma, Changhe Li, Yanbin Zhang, Abhinav Kumar, Rajesh Singh, Sayed M. Eldin, Mohamed Abbas
Summary: The present study aimed to develop dissimilar AA2024 and AA2014-based composite materials using nano-TiO2 reinforcement particles via Friction Stir Processing (FSP) techniques. The FSP technique led to the formation of a homogeneous and fine-grained microstructure in the composite samples, resulting in improved hardness and tensile properties. The research has implications for extending the properties of other metal alloys and opens up new avenues for research in the field of materials science.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Multidisciplinary
Wei Zhang, Zhichao Ma, Dongni Liu, Junming Xiong, Hongwei Zhao, Luquan Ren
Summary: In this study, graphene oxide (GO) reinforced high-entropy alloy (HEA) composites with different GO contents were synthesized and their surface hardness and wear resistance were comparatively investigated. The results showed that an appropriate amount of GO significantly improved the surface hardness and wear resistance of the materials, but excessive GO content resulted in decreased hardness and increased friction coefficient.
Article
Metallurgy & Metallurgical Engineering
G. Kumaresan, B. Arul Kumar
Summary: Aluminium metal matrix composites (AMMC) are advanced materials preferred for their lightweight, high strength, low coefficient of thermal expansion, and high wear resistance properties. Stir casting is an economical route for processing metal matrix composites with uniform distribution of reinforcement particles. This study investigated the effect of hybrid ceramic particle reinforcements on the mechanical and tribological properties of AMMC, and found that the mechanical properties increased significantly and the wear rate decreased with the increase in reinforcements.
INTERNATIONAL JOURNAL OF METALCASTING
(2023)
Article
Materials Science, Multidisciplinary
Di Wang, Shoufan Rong
Summary: A new bimetal cast-weld composite process was used to produce roll sleeves, resulting in a smooth transition in microhardness values and no observed defects in the composite layer. The surfacing layer disappeared, forming a direct metallurgical composite layer between LAS and HCCI.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Engineering, Mechanical
Hua Su, Chuding Zhang, Shan Sun
Summary: A Carbon/Carbon (C/C) composite material finger seal was proposed to reduce wear in high velocity, high temperature, and high pressure gas turbine conditions, with testing showing varying friction coefficients and wear rates under different conditions. A regression analysis model was established to predict wear rates based on load, speed, and temperature, with corrections made for high-speed operating conditions, verifying the wear rate calculation method for C/C composite finger seals.
Article
Chemistry, Physical
Yu Zhou, Hang Dong, Zhuojun Yang, Yonghong Liu
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
(2020)
Article
Engineering, Ocean
Peng Liu, Yonghong Liu, Baoping Cai, Xinlei Wu, Ke Wang, Xiaoxuan Wei, Chao Xin
APPLIED OCEAN RESEARCH
(2020)
Article
Electrochemistry
Shokoufeh Rastgar, Sebastian Pleis, Yanzhen Zhang, Gunther Wittstock
Summary: A strategy is proposed to generate single microdrops with femtoliter to microliter volumes as a liquid reactor and to guide them towards a reactive surface within a viscous carrier liquid. Reactions of the drop content with the surface are exemplified by exhaustive electrolysis of the reactor content, making use of an ion-conducting pathway through the carrier liquid. The mechanisms by which the redox-active species from the aqueous drop reach the electrode surface were established by a combination of time-lapse microscopy of the drop shape, chronoamperometric recording of the single drop electrolysis, and modelling of the reaction-transport problem, showing that partitioning over the liquid-liquid interface must be a key step in this mechanism. The possibilities of reagent delivery and external triggering of a reaction are expanded by the possibility for controlled addition of further dissolved reactants to the liquid microreactor.
Article
Engineering, Manufacturing
Chi Ma, Changlong Li, Yuhao Yan, Yonghong Liu, Xinlei Wu, Dege Li, Hui Jin, Fan Zhang
Summary: This study proposed a novel in situ vibration method to suppress the challenges of coarse grains in wire and arc additive manufacturing (WAAM). By applying vibration during the manufacturing process, the grain size in both fine grain zone and coarse grain zone was reduced. The mechanical strength and hardness of the parts were improved after the vibration treatment.
3D PRINTING AND ADDITIVE MANUFACTURING
(2023)
Article
Mechanics
Dege Li, Haoren Li, Guodong Yang, Jide Wang, Bingfang Huang, Xinlei Wu, Qiang Sun, Chi Ma, Yonghong Liu, Yanzhen Zhang
Summary: This study investigates the characteristics and mechanisms of confined interface vibration inkjet printing (CIVIJP) at high frequencies, and proposes a new method for adjusting the droplet size, which is of great significance for improving inkjet printing efficiency.
Editorial Material
Electrochemistry
Shokoufeh Rastgar, Sebastian Pleis, Yanzhen Zhang, Gunther Wittstock
Article
Mechanics
Dege Li, Yi Cao, Bingfang Huang, Xinlei Wu, Guofang Hu, Xiaolong Wang, Yonghong Liu, Yanzhen Zhang
Summary: The breakup process of an inviscid liquid bridge sandwiched between two coaxial rods is investigated, with a focus on its profile close to rupture and its influence on subsequent breakup behaviors. The profile of the liquid bridge undergoes a transition from symmetry to asymmetry as the distance between the rods increases. A critical slenderness is found above which the liquid bridge becomes asymmetric and exhibits a well-fitted profile of a sine wave cycle. Experimental and theoretical results show that the ratio of bridge length to equivalent radius is always 2 pi for the asymmetric bridge close to rupture. The influence of slenderness on the time interval between asymmetric pinch-off events, velocity, destination, and size of the satellite droplet is explored.
Article
Mechanics
Dege Li, Haoren Li, Guodong Yang, Yi Cao, Bingfang Huang, Xinlei Wu, Qiang Sun, Chi Ma, Yu Zhou, Yonghong Liu, Yanzhen Zhang
Summary: This study proposes a confined interface vibration inkjet printing technique that allows for printing patterns in a liquid environment with smaller droplet sizes. By adjusting the intensity of the pulse stimulation, the size and quantity of the dispensed droplets can be controlled, enriching the fundamental theory of inkjet printing in liquid phase.
JOURNAL OF FLUID MECHANICS
(2022)
Article
Nanoscience & Nanotechnology
Dege Li, Jide Wang, Guodong Yang, Xinlei Wu, Zihao Li, Guofang Hu, Xiaolong Wang, Yonghong Liu, Yanzhen Zhang
Summary: In this study, a high-throughput piezoelectric droplet dispensing technique based on the resonance of the liquid column within the glass capillary was proposed. Experimental and theoretical studies showed that the resonance frequencies of different orders of the liquid column perfectly matched the theoretical value. It was further demonstrated that droplets could be ejected by a driving voltage as low as 1 V when the working frequency was close to the resonant frequency of the piezoelectric ceramic. This ultra-low driving voltage and power consumption make this dispenser compatible with various digital transistor-transistor logic or complementary metal-oxide-semiconductor drive circuits without any power amplifier.
Article
Engineering, Electrical & Electronic
Yanzhen Zhang, Mingyu Yan, Jianhao Zhu, Haifeng Zang
Summary: This paper presents a straightforward and efficient method for liquid metal patterning using nanosecond laser irradiation. It investigates the influence of laser parameters and orifice geometries on the characteristics of liquid metal ejection, providing a theoretical and technical foundation for achieving precise and efficient patterning of liquid metals.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Xinlei Wu, Yonghong Liu, Xuexin Zhang, Hang Dong, Chao Zheng, Fan Zhang, Qiang Sun, Hui Jin, Renjie Ji
JOURNAL OF CLEANER PRODUCTION
(2020)
Article
Chemistry, Physical
Fan Zhang, Renjie Ji, Yonghong Liu, Yuan Pan, Baoping Cai, Zhijian Li, Zheng Liu, Shuaichen Lu, Yating Wang, Hui Jin, Chi Ma, Xinlei Wu
APPLIED CATALYSIS B-ENVIRONMENTAL
(2020)
Article
Physics, Fluids & Plasmas
Sun Qiang, Liu Yonghong, Han Yancong, Wu Xinlei, Liu Peng, Jin Hui
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2020)
