Effects of structure of zinc dialkyldithiophosphates on tribological properties of tetrahedral amorphous carbon f ilm under boundary lubrication

2016 ◽  
Vol 98 ◽  
pp. 26-40 ◽  
Author(s):  
Hikaru Okubo ◽  
Seiya Watanabe ◽  
Chiharu Tadokoro ◽  
Shinya Sasaki
Keyword(s):  
Amorphous Carbon ◽  
Tribological Properties ◽  
Boundary Lubrication ◽  
Zinc Dialkyldithiophosphates ◽  
Tetrahedral Amorphous Carbon

Thin coatings with tetrahedral amorphous carbon structure and their behavior in boundary lubrication conditions

2020 ◽  
pp. 506-511
Author(s):  
V.D. Samusenko ◽  
I.A. Zavidovskii ◽  
O.A. Streletskii ◽  
I.A. Buyanovskii ◽  
M.M. Khrushchov ◽  
...  
Keyword(s):  
Amorphous Carbon ◽  
Boundary Lubrication ◽  
Carbon Structure ◽  
Thin Coatings ◽  
Tribological Tests ◽  
Tetrahedral Amorphous Carbon ◽  
Structural Peculiarities ◽  
Lubrication Conditions

The results of an investigation of the structural peculiarities of the thin ta-C coatings obtained by the method of impulse arc sputtering of graphite and of their tribological tests in boundary lubrication conditions are presented.

Structure and Tribological Properties of Ultra-Thin Tetrahedral Amorphous Carbon (ta-C) Films

Tribology ◽  
2006 ◽  
Author(s):  
Xinchun Lu ◽  
Hui Wang ◽  
Chenhui Zhang ◽  
Jianbin Luo
Keyword(s):  
Amorphous Carbon ◽  
Tribological Properties ◽  
Electron Spectroscopy ◽  
Vacuum Arc ◽  
Wear Properties ◽  
Force Microscopy ◽  
Tetrahedral Amorphous Carbon ◽  
Atomic Force ◽  
Transmission Electron ◽  
Filtered Cathodic Vacuum Arc

Ultra-thin tetrahedral amorphous carbon (ta-C) films were deposited by the filtered cathodic vacuum arc (FCVA) technique. The thickness, structure, and topography of the films were studied by various analysis methods, such as auger electron spectroscopy (AES) depth profile, high resolution transmission electron microscope (HRTEM), Raman spectroscopy, and atomic force microscopy (AFM). A tribometer was used to investigate the tribological properties of the ta-C films. The results indicate that ta-C film with thickness less than 2 nm can be obtained by the FCVA technique. As the film thickness increases the relative intensity ratio ID/IG decreases, which means that sp3 bond in the films increases. The oxide layer cleaning procedure of silicon substrate before deposition influences the growth mode and surface roughness of the films. The ultra-thin ta-C film has the lowest friction coefficient of 0.19 and excellent anti-wear properties.

scholarly journals Tribological properties of multilayer tetrahedral amorphous carbon coatings deposited by filtered cathodic vacuum arc deposition

Friction ◽  
2021 ◽  
Author(s):  
Young-Jun Jang ◽  
Jae-Il Kim ◽  
WooYoung Lee ◽  
Jongkuk Kim
Keyword(s):  
Amorphous Carbon ◽  
Tribological Properties ◽  
High Speed ◽  
Multilayer Coating ◽  
High Speed Steel ◽  
Single Layer ◽  
Vacuum Arc ◽  
Mechanical And Tribological Properties ◽  
Tetrahedral Amorphous Carbon ◽  
Filtered Cathodic Vacuum Arc

AbstractTetrahedral amorphous carbon (ta-C) has emerged as an excellent coating material for improving the reliability of application components under high normal loads. Herein, we present the results of our investigations regarding the mechanical and tribological properties of a 2-µm-thick multilayer ta-C coating on high-speed steel substrates. Multilayers composed of alternating soft and hard layers are fabricated using filtered a cathodic vacuum arc with alternating substrate bias voltages (0 and 100 V or 0 and 150 V). The thickness ratio is discovered to be 1:3 for the sp2-rich and sp3-rich layers. The results show that the hardness and elastic modulus of the multilayer ta-C coatings increase with the sp3 content of the hard layer. The hardness reached approximately 37 GPa, whereas an improved toughness and a higher adhesion strength (> 29 N) are obtained. The friction performance (µ = 0.07) of the multilayer coating is similar to that of the single layer ta-C thick coating, but the wear rate (0.13 × 10−6 mm3/(N·m)) improved under a high load of 30 N. We further demonstrate the importance of the multilayer structure in suppressing crack propagation and increasing the resistance to plastic deformation (H3/E2) ratio.

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