Low Friction Property of Diamond-Like Carbon Coating Films and Oxygen Transmission Ratio of Amorphous Carbon Films Deposited by Advanced Coating Processes

2012 ◽  
Vol 51 (9R) ◽  
pp. 090126 ◽  
Author(s):  
Toshiyuki Watanabe ◽  
Makoto Kano ◽  
Kentaro Yoshida ◽  
Tetsuya Suzuki
Keyword(s):  
Amorphous Carbon ◽  
Carbon Coating ◽  
Carbon Films ◽  
Transmission Ratio ◽  
Diamond Like Carbon ◽  
Friction Property ◽  
Low Friction ◽  
Coating Films ◽  
Amorphous Carbon Films ◽  
Oxygen Transmission

scholarly journals Elastic Constants of Diamond-Like Carbon Films by Surface Brillouin Scattering

1999 ◽  
Vol 593 ◽  
Author(s):  
A.C. Ferrari ◽  
J. Robertson ◽  
R. Pastorelli ◽  
M.G. Beghi ◽  
C.E. Bottani
Keyword(s):  
Thin Films ◽  
Amorphous Carbon ◽  
Elastic Constants ◽  
Acoustic Waves ◽  
Brillouin Scattering ◽  
Surface Acoustic Waves ◽  
Carbon Films ◽  
Diamond Like Carbon ◽  
Amorphous Carbon Films ◽  
Tetrahedral Amorphous Carbon

ABSTRACTThe elastic constants of thin Diamond-Like Carbon (DLC) films supply important information, but their measurement is difficult. Standard nanoindentation does not directly measure the elastic constants and has strong limitations particularly in the case of hard thin films on softer substrates, such as tetrahedral amorphous carbon on Si. Surface acoustic waves provide a better mean to investigate elastic properties. Surface Brillouin scattering (SBS) intrinsically probes acoustic waves of the wavelength which is appropriate to test the properties of films in the tens to hundreds of nanometers thickness range. SBS can be used to derive all the isotropic elastic constants of hard-on-soft and soft-on-hard amorphous carbon films of different kinds, with thickness down to less than 10 nm. The results help to resolve the previous uncertainties in mechanical data. The Young's modulus of tetrahedral amorphous carbon (ta-C) turns out to be lower than that of diamond, while the moduli of hydrogenated ta-C (ta-C:H) are considerably lower than those of ta-C because of the weakening effect of C-H bonding.

scholarly journals Elastic Constants of Diamond Like Carbon Films by Surface Brillouin Scattering

1999 ◽  
Vol 594 ◽  
Author(s):  
A. C. Ferrari ◽  
J. Robertson ◽  
R. Pastorelli ◽  
M. G. Beghi ◽  
C. E. Bottani
Keyword(s):  
Thin Films ◽  
Amorphous Carbon ◽  
Elastic Constants ◽  
Acoustic Waves ◽  
Brillouin Scattering ◽  
Surface Acoustic Waves ◽  
Carbon Films ◽  
Diamond Like Carbon ◽  
Amorphous Carbon Films ◽  
Tetrahedral Amorphous Carbon

AbstractThe elastic constants of thin Diamond-Like Carbon (DLC) films supply important information, but their measurement is difficult. Standard nanoindentation does not directly measure the elastic constants and has strong limitations particularly in the case of hard thin films on softer substrates, such as tetrahedral amorphous carbon on Si. Surface acoustic waves provide a better mean to investigate elastic properties. Surface Brillouin scattering (SBS) intrinsically probes acoustic waves of the wavelength which is appropriate to test the properties of films in the tens to hundreds of nanometers thickness range. SBS can be used to derive all the isotropic elastic constants of hard-on-soft and soft-on-hard amorphous carbon films of different kinds, with thickness down to less than 10 nm. The results help to resolve the previous uncertainties in mechanical data. The Young's modulus of tetrahedral amorphous carbon (ta-C) turns out to be lower than that of diamond, while the moduli of hydrogenated ta-C (ta-C:H) are considerably lower than those of ta-C because of the weakening effect of C-H bonding.

Ultra-low friction mechanism of highly sp3-hybridized amorphous carbon controlled by interfacial molecule adsorption

2018 ◽  
Vol 20 (35) ◽  
pp. 22445-22454 ◽  
Author(s):  
Jing Shi ◽  
Tiandong Xia ◽  
Chengbing Wang ◽  
Kun Yuan ◽  
Junyan Zhang
Keyword(s):  
Amorphous Carbon ◽  
Carbon Materials ◽  
Carbon Films ◽  
Nanocrystalline Diamond ◽  
Diamond Like Carbon ◽  
Low Friction ◽  
Friction Mechanism ◽  
Molecule Adsorption

The friction behaviors of highly sp3-hybridized carbon films, including ultra-nanocrystalline diamond and diamond-like carbon materials, strongly depend on atmospheres.

Low friction mechanism of chlorine-doped amorphous carbon films sliding against an aluminium alloy

2017 ◽  
Vol 115 ◽  
pp. 573-579 ◽  
Author(s):  
Yuuki Tokuta ◽  
Takashi Itoh ◽  
Takahiko Shiozaki ◽  
Masahiro Kawaguchi ◽  
Shinya Sasaki
Keyword(s):  
Aluminium Alloy ◽  
Amorphous Carbon ◽  
Carbon Films ◽  
Low Friction ◽  
Friction Mechanism ◽  
Amorphous Carbon Films

Origin of low friction for amorphous carbon films with different hydrogen content in nitrogen atmosphere

2019 ◽  
Vol 140 ◽  
pp. 105853 ◽  
Author(s):  
Jingjing Wang ◽  
Xia Li ◽  
Guizhi Wu ◽  
Zhibin Lu ◽  
Guangan Zhang ◽  
...  
Keyword(s):  
Amorphous Carbon ◽  
Hydrogen Content ◽  
Carbon Films ◽  
Nitrogen Atmosphere ◽  
Low Friction ◽  
Amorphous Carbon Films

Tribological Propertees of Carbon thin Films Prepared by Plasma-Free Sputtering Method

1991 ◽  
Vol 239 ◽  
Author(s):  
T. Hirata ◽  
M. Naoe
Keyword(s):  
Thin Films ◽  
Low Temperature ◽  
Magnetron Sputtering ◽  
Amorphous Carbon ◽  
Carbon Films ◽  
Diamond Like Carbon ◽  
Amorphous Carbon Films ◽  
Magnetic Disk ◽  
Protective Layers ◽  
Better Than

ABSTRACTAmorphous “Diamond-like” carbon films were deposited on plasma-free substrates at low temperature by the Facing Targets Sputtering (FTS) method. Tribological characteristics determined by tap, scratch and slide tests were much better than those for amorphous carbon films deposited by the conventional Magnetron Sputtering (MS) method. Consequently, these films deposited by the FTS method were surely useful for protective layers in rigid magnetic disk.

Tetrahedral Amorphous Carbon With Ultratrace Hydrogen

2014 ◽  
Author(s):  
Hiroshi Inaba ◽  
Toru Matsumura ◽  
Yoko Saito ◽  
Hiroyuki Matsumoto
Keyword(s):  
Amorphous Carbon ◽  
Near Field ◽  
Carbon Films ◽  
Diamond Like Carbon ◽  
Protective Film ◽  
Amorphous Films ◽  
Amorphous Carbon Films ◽  
Tetrahedral Amorphous Carbon ◽  
Crystalline Films ◽  
Heating Up

In heat assisted magnetic recording (HAMR) where near-field light from a head heats up a disk, disk overcoat needs to be heat-resistive and transparent. ta-C (tetrahedral amorphous carbon) films have been considered to be promising for HAMR disk overcoat, because they are denser and harder than diamond-like carbon (DLC) films that have been used as disk overcoat. In the previous study, ta-C did not show any change in the film thickness by heating up to 450 degrees Celsius, approving a heat-resistant high protective film [1]. The purpose of this study is to investigate enhanced ta-C, which is harder, denser and higher-thermostability than those of conventional ta-C in reference to that nanometer-sized diamonds were more stable than graphite by adding the small amount of hydrogen [2]. In this report, ultratrace hydrogenerated ta-C, amorphous films, was investigated to expect similar effect as was observed in the crystalline films.

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