scholarly journals Probing the Lubrication of Shear-Induced Self-assembled Layer on Amorphous Carbon Films in Methane Atmosphere

2022 ◽  
Vol 70 (1) ◽  
Author(s):  
Lin Chen ◽  
Jian Wu ◽  
Zhibin Lu ◽  
Lunlin Shang ◽  
Guangan Zhang ◽  
...  
Keyword(s):  
Amorphous Carbon ◽  
Carbon Films ◽  
Amorphous Carbon Films ◽  
Self Assembled ◽  
Self Assembled Layer

scholarly journals Probing the Lubrication of Shear-Induced Self-Assembled Layer on Amorphous Carbon Films in Methane Atmosphere

2021 ◽  
Author(s):  
Lin Chen ◽  
Jian Wu ◽  
Zhibin Lu ◽  
Lunlin Shang ◽  
Guangan Zhang ◽  
...  
Keyword(s):  
Shear Strength ◽  
Amorphous Carbon ◽  
Interfacial Shear Strength ◽  
Carbon Films ◽  
Raw Material ◽  
Amorphous Carbon Films ◽  
Tribological System ◽  
Interfacial States ◽  
Self Assembled Layer ◽  
Lubricating Properties

Abstract Demand for reduction in friction and improvement in wear resistance of moving parts propels exploration in frictional origin for amorphous carbon (a-C) film lubricating properties based on the interfacial states. Methane, as an ideal energy carrier and industrial raw material, is one of active gas. Consequently, the relations between the tribological behaviors of a-C film under methane atmosphere and load or interfacial states were discussed based on experimental and theoretical methods. Experimental results illustrated that, as the load increased, tribological system exhibited various interfacial shear strength at a load of zero and pressure dependence of the shear strength for tribological systems. And then the origin was revealed with theoretical calculation and resulted from the distributions of adsorbates across the sliding interface.

Scanning Tunneling Microscopy of Amorphous Carbon Films

1990 ◽  
Vol 48 (1) ◽  
pp. 318-319
Author(s):  
Mircea Fotino ◽  
D.C. Parks
Keyword(s):  
Scanning Tunneling Microscopy ◽  
Amorphous Carbon ◽  
Carbon Films ◽  
Atomic Scale ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Amorphous Carbon Films ◽  
Image Optimization ◽  
Step Procedure ◽  
Stm Images

In the last few years scanning tunneling microscopy (STM) has made it possible and easily accessible to visualize surfaces of conducting specimens at the atomic scale. Such performance allows the detailed characterization of surface morphology in an increasing spectrum of applications in a wide variety of fields. Because the basic imaging process in STM differs fundamentally from its equivalent in other well-established microscopies, good understanding of the imaging mechanism in STM enables one to grasp the correct information content in STM images. It thus appears appropriate to explore by STM the structure of amorphous carbon films because they are used in many applications, in particular in the investigation of delicate biological specimens that may be altered through the preparation procedures.All STM images in the present study were obtained with the commercial instrument Nanoscope II (Digital Instruments, Inc., Santa Barbara, California). Since the importance of the scanning tip for image optimization and artifact reduction cannot be sufficiently emphasized, as stressed by early analyses of STM image formation, great attention has been directed toward adopting the most satisfactory tip geometry. The tips used here consisted either of mechanically sheared Pt/Ir wire (90:10, 0.010" diameter) or of etched W wire (0.030" diameter). The latter were eventually preferred after a two-step procedure for etching in NaOH was found to produce routinely tips with one or more short whiskers that are essentially rigid, uniform and sharp (Fig. 1) . Under these circumstances, atomic-resolution images of cleaved highly-ordered pyro-lytic graphite (HOPG) were reproducibly and readily attained as a standard criterion for easily recognizable and satisfactory performance (Fig. 2).

Tribo-mechanical properties and biocompatibility of Ag-containing amorphous carbon films deposited onto Ti6Al4V

2021 ◽  
pp. 127384
Author(s):  
Wolfgang Tillmann ◽  
Nelson Filipe Lopes Dias ◽  
Carlo Franke ◽  
David Kokalj ◽  
Dominic Stangier ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Amorphous Carbon ◽  
Carbon Films ◽  
Amorphous Carbon Films

Thermal Conductivity Enhancement in Ion-Irradiated Hydrogenated Amorphous Carbon Films

Nano Letters ◽  
2021 ◽  
Author(s):  
Ethan A. Scott ◽  
Sean W. King ◽  
Nanette N. Jarenwattananon ◽  
William A. Lanford ◽  
Han Li ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Amorphous Carbon ◽  
Carbon Films ◽  
Thermal Conductivity Enhancement ◽  
Amorphous Carbon Films ◽  
Hydrogenated Amorphous Carbon ◽  
Conductivity Enhancement ◽  
Hydrogenated Amorphous
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