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Volume 9 No. 3
05 June 2021

Yilong REN,Lin ZHANG,Guoxin XIE,Zhanbo LI,Hao CHEN,Hanjun GONG,Wenhu XU,Dan GUO,Jianbin LUO

2021, 9(3): 429-470.   doi:10.1007/s40544-020-0446-4
Abstract ( 69 HTML ( 4   PDF(4925KB) ( 107 )   Save

Self-lubricating polymer composite coatings, with tailorable tribological and mechanical properties, have been widely employed on mechanical parts to reduce friction and wear, which saves energy and improves the overall performance for applications such as aerospace satellite parts, shafts, gears, and bushings. The addition of functional fillers can overcome the limitations of single-polymer coatings and extend the service life of the coatings by providing a combination of low friction, high ...

Zuobing WU

2021, 9(3): 471-487.   doi:10.1007/s40544-019-0349-4
Abstract ( 37 HTML ( 1   PDF(2588KB) ( 40 )   Save

For three-dimensional (3D) mono-layer molecular thin-film lubrication, the elasticity of the substrate affects the tribological behaviors of a thin fluid film confined by two solid substrates. To account for the elastic effects, this study establishes a multi-scale method that combines an atomistic description of the near region with a coarse-grained description of the far region of the solid substrate to simulate the thin-film lubrication. It is demonstrated that for a given temperature rang...

Xiaojing CI,Wenjie ZHAO,Jun LUO,Yangmin WU,Tianhao GE,Qunji XUE,Xiulei GAO,Zhiwen FANG

2021, 9(3): 488-501.   doi:10.1007/s40544-019-0350-y
Abstract ( 18 HTML ( 2   PDF(3886KB) ( 14 )   Save

Fluorographene, a new alternative to graphene, it not only inherits the 2-dimensional (2D) layered structure and outstanding mechanical properties, but also possesses controllable C-F bonds. It is meaningful to reveal the evolution processes of the tribological behaviors from graphene to fluorographene. In this work, fluorinated reduced graphene oxide nanosheets (F-rGO) with different degree of fluorination were prepared using direct gas-fluorination and they were added into gas to liquid-8 (...

Hao CHEN,Xinlei GAO

2021, 9(3): 502-512.   doi:10.1007/s40544-019-0352-9
Abstract ( 27 HTML ( 1   PDF(2542KB) ( 25 )   Save

Relationship between contact size (A) and static friction (f) has been studied for rigid crystalline systems. We built a series of systems with two identical surfaces but different orientations and investigated the effects of the size and shape of the contact area on static friction. In these systems, there are numerous nontrivial commensurate contacts. Our results confirmed that the relationship between A and f was determined by both commensurability and shape of ...

Shaowei LI,Pengpeng BAI,Yuanzhe LI,Noshir S. PESIKA,Yonggang MENG,Liran MA,Yu TIAN

2021, 9(3): 513-523.   doi:10.1007/s40544-019-0354-7
Abstract ( 13 HTML ( 0   PDF(1660KB) ( 16 )   Save

With the development of surface and interface science and technology, methods for the online modulation of interfacial performance by external stimuli are in high demand. Switching between ultra-low and high friction states is a particular goal owing to its applicability to the development of precision machines and nano/micro-electromechanical systems. In this study, reversible switching between superlubricity and high friction is realized by controlling the electric potential of a gold surfa...

Hailong LIU,Yajing HUANG,Yaozhu WANG,Xiaomin ZHAO,Danqing CHEN,Guohua CHEN

2021, 9(3): 524-537.   doi:10.1007/s40544-019-0357-4
Abstract ( 17 HTML ( 2   PDF(4231KB) ( 22 )   Save

Anthracite sheets were coated by sorbitol fatty acid ester (span80) through ball-milling process. The tribological properties of the span80-coated anthracite sheets as the additive in polyalpha olefin were evaluated through a series of friction tests using a four ball machine. The results revealed that the span80-coated anthracite sheets exhibited excellent dispersion stability in base oil. In addition, compared with base oil, the average coefficient of friction, wear scar diameter, and wear ...

Guoda YU,Huaiju LIU,Ken MAO,Caichao ZHU,Zehua LU

2021, 9(3): 538-550.   doi:10.1007/s40544-020-0362-7
Abstract ( 9 HTML ( 0   PDF(5865KB) ( 16 )   Save

This study presents the results of detailed wear process examination on polyformaldehyde gears under both dry and lubricated conditions. A multi-purpose durability test rig was employed to study the wear performance of polyformaldehyde gear pairs. The wear behaviors of polyformaldehyde gears under dry and oil-lubricated operating conditions were characterized via measurements of gear tooth surface micro-topography and tooth profile deviation. Under the dry running condition, a hump and a gull...

Chaobao WANG,Xiuqin BAI,Conglin DONG,Zhiwei GUO,Chengqing YUAN,Anne NEVILLE

2021, 9(3): 551-568.   doi:10.1007/s40544-020-0404-1
Abstract ( 9 HTML ( 2   PDF(3686KB) ( 14 )   Save

Several soft tissues residing in the living body have excellent hydration lubrication properties and can provide effective protection during relative motion. In order to apply this advantage of soft matters in practical applications and try to avoid its disadvantage, such as swelling and weakening in water, a design strategy of a soft/hard double network (DN) hydrogel microsphere modified ultrahigh molecular weight polyethylene (UHMWPE) composite is proposed in this study. A series of microsp...

Vipin SHARMA,Ujjwal PRAKASH,B. Venkata MANOJ KUMAR

2021, 9(3): 569-582.   doi:10.1007/s40544-020-0409-9
Abstract ( 11 HTML ( 3   PDF(7534KB) ( 8 )   Save

Friction stir processing (FSP) is an emerging solid-state technique for preparing surface composites using various reinforcements. Ceramics and metallic particles are easily reinforced in a matrix by this technique. Surface composites made from an LM24 alloy reinforced with graphite and tin, with good wettability and material flow owing to the low melting point of tin, were fabricated by FSP at two rotational speeds of 1,400 and 1,000 rpm. Despite its low hardness, the graphite/LM24 surface c...

Florian KÖNIG,Christopher SOUS,Georg JACOBS

2021, 9(3): 583-597.   doi:10.1007/s40544-020-0417-9
Abstract ( 11 HTML ( 0   PDF(3200KB) ( 18 )   Save

With the increased use of automotive engine start-stop systems, the numerical prediction and reduction of frictional losses in sliding bearings during starting and stopping procedures has become an important issue. In engineering practice, numerical simulations of sliding bearings in automotive engines are performed with statistical asperity contact models with empirical values for the necessary surface parameters. The aim of this study is to elucidate the applicability of these approaches fo...

Xudong WANG,Hirotsuna SATO,Koshi ADACHI

2021, 9(3): 598-611.   doi:10.1007/s40544-020-0423-y
Abstract ( 9 HTML ( 2   PDF(3323KB) ( 12 )   Save

Nanodiamond particles (NDPs) have been considered as a potential lubricant additive to various tribological applications, such as water lubrication systems. In this study, the tribological properties of silicon carbide (SiC) lubricated by NDPs dispersed in water are investigated utilizing the ball-on-disk tribometer. It is found that the slight addition of NDP to water (i.e., 0.001 wt%) can distinctly accelerate the running-in process, which is necessary to achieve a friction coefficient (...

Siti Hartini HAMDAN,Chiew Tin LEE,Mei Bao LEE,William Woei Fong CHONG,Cheng Tung CHONG,Suhaila Mohd SANIP

2021, 9(3): 612-626.   doi:10.1007/s40544-020-0428-4
Abstract ( 9 HTML ( 1   PDF(3181KB) ( 8 )   Save

In biodiesel-fueled compression-ignition (CI) engines, dilution by unburned biodiesel has been found to have adverse effects on the boundary lubrication properties of additives in fully formulated engine lubricants. Such dilution of engine lubricants could be even more pronounced for CI engines running on higher blend concentrations of biodiesel. Given the nanoscopic nature of the interaction, this study seeks to determine the nano-tribological properties of an engine lubricant additive (e.g....

Changning BAI,Zhenbin GONG,Lulu AN,Li QIANG,Junyan ZHANG,Georgy YUSHKOV,Alexey NIKOLAEV,Maxim SHANDRIKOV,Bin ZHANG

2021, 9(3): 627-641.   doi:10.1007/s40544-020-0436-6
Abstract ( 29 HTML ( 2   PDF(4481KB) ( 23 )   Save

Diamond-like carbon (DLC) films are deposited on rubber surfaces to protect the rubber components, and surface pretreatment of the rubber substrates prior to the film deposition can improve the adhesion between the DLC films and the rubber. Thus, the principal purpose of this work concentrates on determining the effects of argon (Ar), oxygen (O2), nitrogen (N2), and hydrogen (H2) plasma pretreatments on the adhesion and friction performance of the DLC films de...

Zhinan ZHANG,Nian YIN,Shi CHEN,Chengliang LIU

2021, 9(3): 642-655.   doi:10.1007/s40544-020-0457-3
Abstract ( 7 HTML ( 0   PDF(2666KB) ( 15 )   Save

Friction plays a vital role in energy dissipation, device failure, and even energy supply in modern society. After years of research, data and information on tribology research are becoming increasingly available. Because of the strong systematic and multi-disciplinary coupling characteristics of tribology, tribology information is scattered in various disciplines with different patterns, e.g., technical documents, databases, and papers, thereby increasing the information entropy of the syste...

Shiqi FANG,Dirk BÄHRE,Luis LLANES

2021, 9(3): 656-664.   doi:10.1007/s40544-020-0422-z
Abstract ( 10 HTML ( 3   PDF(2066KB) ( 18 )   Save

The combined use of focused ion beam (FIB) milling and field-emission scanning electron microscopy inspection (FESEM) is a unique and successful approach for assessment of near-surface phenomena at specific and selected locations. In this study, a FIB/FESEM dual-beam platform was implemented to docment and analyze the wear micromechanisms on a laser-surface textured (LST) hardmetal (HM) tool. In particular, changes in surface and microstructural integrity of the laser-sculptured pyramids (eff...