Development of hard carbon coatings for thin-film tape heads

1995 ◽  
Vol 31 (6) ◽  
pp. 2976-2978 ◽  
Author(s):  
B. Bhushan ◽  
B.K. Gupta ◽  
R. Sundaram ◽  
S. Dey ◽  
S. Anders ◽  
...  
Keyword(s):  
Thin Film ◽  
Hard Carbon ◽  
Carbon Coatings

Traction of Lubricated Rolling Contacts Between Thin Film Coatings and Steel

2007 ◽  
Author(s):  
Ryan D. Evans ◽  
J. David Cogdell ◽  
Gary L. Doll
Keyword(s):  
Thin Film ◽  
Rolling Contact ◽  
Carbon Coatings ◽  
Test Configuration ◽  
Film Coatings ◽  
Thin Film Coatings ◽  
Rolling Contacts ◽  
Traction Coefficient ◽  
Coated Surfaces ◽  
Stribeck Curves

Tribological thin film coatings can enhance performance in mechanical components such as bearings and gears. Although lubricant is present in most applications, the interactions of the lubricant with coated surfaces are not always well understood. In the present study, Stribeck curves (i.e., traction coefficient vs. dimensionless film thickness Λ) were generated for lubricated rolling contact between coated and uncoated surfaces. Chromium nitride, tungsten carbide reinforced amorphous hydrocarbon, and silicon-incorporated diamond-like carbon coatings are evaluated. A ball-on-flat test configuration is used in a 100% slide-to-roll condition. The test lubricant was a polyalphaolefin containing rust and oxidation inhibitor additives only. Differences in traction performance are observed for different coating types. The traction coefficient decreases at high Λ with increasing hydrocarbon content in the coating. The combination of coating micro-texture and composition are believed to influence traction as A becomes small.

scholarly journals Variation of carbon coatings on the electrochemical performance of LiFePO4 cathodes for lithium ionic batteries

RSC Advances ◽  
2017 ◽  
Vol 7 (70) ◽  
pp. 44296-44302 ◽  
Author(s):  
Weiwei Jiang ◽  
Mengqiang Wu ◽  
Fei Liu ◽  
Jian Yang ◽  
Tingting Feng
Keyword(s):  
Electrochemical Performance ◽  
Carbon Coating ◽  
Rate Capability ◽  
Superior Performance ◽  
Hard Carbon ◽  
Carbon Coatings ◽  
Soft Carbon

Asphalt-derived and glucose-derived carbon proved to be soft carbon-coating (SCC) and hard carbon-coating (HCC), and it was found that LFP/SCC showed a superior performance in capacity and rate capability than that of LFP/HCC.

Pulsed laser deposition of hard carbon coatings at atmospheric pressure

2003 ◽  
Vol 33 (3) ◽  
pp. 189-191 ◽  
Author(s):  
Taras V Kononenko ◽  
Vitalii I Konov ◽  
Evgenii N Lubnin ◽  
F Dausinger
Keyword(s):  
Pulsed Laser Deposition ◽  
Atmospheric Pressure ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
Hard Carbon ◽  
Carbon Coatings

A Rolling Contact Fatigue Study of Hard Carbon Coated M-50 Steel

1992 ◽  
Vol 114 (2) ◽  
pp. 298-302 ◽  
Author(s):  
R. Wei ◽  
P. J. Wilbur ◽  
F. M. Kustas
Keyword(s):  
Rolling Contact Fatigue ◽  
Contact Fatigue ◽  
Base Material ◽  
Ion Source ◽  
Rolling Contact ◽  
Hard Carbon ◽  
Material Interfaces ◽  
Carbon Coatings ◽  
Carbon Coated ◽  
Stress Cycles

Hard carbon coatings with diamond-like properties were applied on AISI M-50 steel rods which were subjected to rolling contact fatigue (RCF) testing at a cyclic Hertzian stress level of 5.5 GPa. The coatings were produced using a single, broad beam ion source that directed 450 eV ions, derived from a methane discharge, onto the rods. Results from preliminary tests show that hard carbon coatings alter the fatigue failure characteristics of this material substantially. They caused the B50 lifetime to increase from 7.5 × 106 stress cycles for uncoated material to 13 × 106 but they also caused the B10 lifetime to decrease from 4 × 106 stress cycles for the uncoated material to less than 1 × 106. The coatings induced an order of magnitude increase in lifetime for some tests. Scanning electron microscopy, surface profilometry and microhardness tests were used to examine coating morphologies, investigate coating/base material interfaces and demonstrate hardness increases.

A comparative study of the fretting wear of hard carbon coatings

1993 ◽  
Vol 223 (1) ◽  
pp. 65-71 ◽  
Author(s):  
B. Blanpain ◽  
J.P. Celis ◽  
J.R. Roos ◽  
J. Ebberink ◽  
J. Smeets
Keyword(s):  
Comparative Study ◽  
Fretting Wear ◽  
Hard Carbon ◽  
Carbon Coatings
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