Tribological Properties and Self-compensating Lubrication Mechanisms of Ni3Al Matrix Bio-inspired Shell-like Composite Structure

Abstract Interface interaction between gallium-based liquid metal and copper-based materials results in the formation of intermetallic CuGa2 grains. In particular, CuGa2 grains are able to produce a uniform film and the newly formed CuGa2 film holds peculiar characteristics, which have not been fully explored up to now. In this study, we present an electrochemical fabrication method of an in situ CuGa2 film on copper surface. Surface morphology and chemical composition of this film are confirmed. Tribological experiments demonstrate that the CuGa2 film enables good antifriction and antiwear abilities. Furthermore, the lubrication mechanisms of the CuGa2 film are revealed.

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Study on Tribological Properties of n-SiO2/FeS Solid Lubrication Composite Coating

Materials Science Forum ◽

10.4028/www.scientific.net/msf.694.914 ◽

2011 ◽

Vol 694 ◽

pp. 914-918

Author(s):

Yu Qiang Zhao ◽

Yan Zang ◽

Yu Lin Qiao ◽

Shan Lin Yang

Keyword(s):

Friction Coefficient ◽

Composite Coating ◽

Tribological Properties ◽

Treatment Process ◽

Solid Lubrication ◽

Vacuum Impregnation ◽

Comprehensive Treatment ◽

Low Friction ◽

Duplex Coating ◽

Lubrication Mechanisms

The n-SiO2/FeS solid lubrication composite coating is prepared by means of the comprehensive treatment process of gridded laser quenching, low temperature ion sulfuration and vacuum impregnation technology. The tribological properties of n-SiO2/FeS solid lubrication composite coating are investigated under the condition of dry sliding, and the lubrication mechanisms are also preliminary discussed. The experiment results reveal that the friction coefficient of the coating is in the range of 0.065~0.10 when tested in 4067 minutes. Furthermore, its wear rate is only 6% of FeS solid lubrication duplex coating. This is testified that the n-SiO2/FeS solid lubrication composite coating is durable with low friction coefficient and wear resistance.

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Friction and Wear of Laser Irradiated Amorphous Metals

Materials Science Forum ◽

10.4028/www.scientific.net/msf.539-543.3844 ◽

2007 ◽

Vol 539-543 ◽

pp. 3844-3849

Author(s):

Masato Tsujikawa ◽

Daisuke Azuma ◽

Makoto Hino ◽

Hisamichi Kimura ◽

Kunio Yubuta ◽

...

Keyword(s):

Amorphous Alloy ◽

Laser Irradiation ◽

Tribological Properties ◽

Composite Structure ◽

Laser Power ◽

Friction And Wear ◽

Amorphous Matrix ◽

Scanning Speed ◽

Amorphous Metals ◽

Annealing Conditions

Tribological properties are found to change with microstructure. In Ni-P amorphous alloy, annealing conditions were varied with laser irradiation parameters such as scanning speed and laser power. The increase in hardness affected by scanning speed. A peak of hardness was observed as the function of scanning speed. This is because, the formation of nanoscopic composite structure by distribution of crystalline Ni3P compounds in amorphous matrix is the hardest structure.

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Tribological evaluation and lubrication mechanisms of nanoparticles enhanced lubricants in cold rolling

Mechanics & Industry ◽

10.1051/meca/2019085 ◽

2020 ◽

Vol 21 (1) ◽

pp. 108

Author(s):

Liang Hao ◽

Zheng Wang ◽

Guoyuan Zhang ◽

Yangyang Zhao ◽

Qingjuan Duan ◽

...

Keyword(s):

Cold Rolling ◽

Coefficient Of Friction ◽

Tribological Properties ◽

Friction Reduction ◽

Base Oils ◽

Lubrication Performance ◽

Protective Films ◽

The Coefficient Of Friction ◽

20 Nm ◽

Lubrication Mechanisms

Base oils containing different nanoparticles with varying concentrations are prepared, in which SiO2, TiO2 and ZnO (20 nm) nanoparticles are employed to improve the lubrication performance. Their tribological properties are evaluated on a ball-on-disk tribometer. The results show that the nano-additive lubricants exhibit a good friction reduction and anti-wear ability at the optimal concentration of 1.0 wt.%, in which SiO2 nanoparticles can reduce the coefficient of friction (COF) and the area of wear scar (AWS) by 45.6% and 35%, respectively. The SiO2 nanoparticles exhibit the best potential additive tested. The lubrication mechanisms of the nanoparticles can be attributed to the rolling, mending and the protective films.

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