Tribological properties of graded diamond-like carbon films on Ti ion-implanted aluminum substrate

Diamond-like carbon (DLC) films is useful in many applications. To improve the tribological properties in DLC, we spin coat the multi-walled carbon nanotubes (CNTs) with different solution on (100) silicon. DLC was deposited by plasma enhanced chemical vapor deposition (PECVD) with C2H2and H2. The results show that the ID/IGratio is increasing with higher CNTs content while the friction coefficient and critical load are decreasing with larger CNTs contents. The decreasing friction coefficient results from graphitation on the surface due to higher sp2content. The decreasing critical load is attributed to higher internal stress. The effect of friction coefficient and CNT concentration on stress distribution is studied by a nanoscratch finite element analysis. The results indicate that low friction coefficient and high CNT concentration will reduce the stress magnitude in the film. Therefore, the decreasing friction coefficient in CNT doped DLC film with increasing CNT concentration should reduce stress in the film and is good for adhesion. The discrepancy between friction coefficient and critical load is explained in terms of high internal stress during deposition. A surface treatment on CNT before deposition to reduce internal stress is currently under investigation.

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Effect of chromium doping on high temperature tribological properties of silicon-doped diamond-like carbon films

Tribology International ◽

10.1016/j.triboint.2020.106546 ◽

2020 ◽

Vol 152 ◽

pp. 106546 ◽

Cited By ~ 2

Author(s):

Bruno J. Rodriguez ◽

Tara L. Schiller ◽

Daniela Proprentner ◽

Marc Walker ◽

C.T. John Low ◽

...

Keyword(s):

High Temperature ◽

Tribological Properties ◽

Carbon Films ◽

Diamond Like Carbon ◽

Chromium Doping ◽

Silicon Doped

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Influence of sulfidation treatment on the structure and tribological properties of nitrogen-doped diamond-like carbon films

Applied Surface Science ◽

10.1016/j.apsusc.2007.12.010 ◽

2008 ◽

Vol 254 (13) ◽

pp. 3859-3866 ◽

Cited By ~ 7

Author(s):

Qun-feng Zeng ◽

Guang-neng Dong ◽

You-bai Xie

Keyword(s):

Tribological Properties ◽

Carbon Films ◽

Diamond Like Carbon ◽

Nitrogen Doped

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Microstructural, mechanical and tribological properties of tungsten-gradually doped diamond-like carbon films with functionally graded interlayers

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2011.01.004 ◽

2011 ◽

Vol 205 (12) ◽

pp. 3631-3638 ◽

Cited By ~ 37

Author(s):

Xinchun Chen ◽

Zhijian Peng ◽

Zhiqiang Fu ◽

Sudong Wu ◽

Wen Yue ◽

...

Keyword(s):

Tribological Properties ◽

Carbon Films ◽

Functionally Graded ◽

Diamond Like Carbon ◽

Mechanical And Tribological Properties

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Bonding in Ion-Implanted Carbon Films Characterized by TEM Spectrum Lines and Energy-Filtered Imaging

MRS Proceedings ◽

10.1557/proc-589-395 ◽

1999 ◽

Vol 589 ◽

Cited By ~ 1

Author(s):

J. Bentley ◽

K.C. Walter ◽

N.D. Evans

Keyword(s):

Energy Shift ◽

Carbon Films ◽

Binding Energies ◽

Diamond Like Carbon ◽

Nitrogen Implantation ◽

Electron Energy Loss Spectrometry ◽

Spectrum Imaging ◽

Binding Energy Shift ◽

Electron Energy Loss ◽

Ion Implanted

AbstractIon-implanted diamond-like carbon (DLC) films have been characterized by techniques based on electron energy-loss spectrometry using an imaging energy filter on a 300kV TEM. Nitrogen implantation results in increased sp2 bonding and a 1.3 eV shift to higher binding energies for carbon-K. Argon implantation results in a smaller increase in sp2bonding with no detectable binding energy shift. The fraction of implanted species retained is much smaller for Ar than for N. Differences in behavior between N- and Ar-implanted DLC are consistent with expected chemical reactions. Preliminary results demonstrate the feasibility of mapping the Φ*/σ* intensity (sp2/sp3) ratio by energy-filtered TEM as an alternative to spectrum imaging in STEM mode

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Optical and electronic properties of nitrogen-implanted diamond-like carbon films

Journal of Materials Research ◽

10.1557/jmr.1994.0085 ◽

1994 ◽

Vol 9 (1) ◽

pp. 85-90 ◽

Cited By ~ 29

Author(s):

G.L. Doll ◽

J.P. Heremans ◽

T.A. Perry ◽

J.V. Mantese

Keyword(s):

Amorphous Carbon ◽

Carbon Film ◽

Film Surface ◽

Carbon Films ◽

Localized States ◽

Diamond Like Carbon ◽

Nitrogen Implantation ◽

Electrical Measurements ◽

Nitrogen Ion ◽

Ion Implanted

Optical and electrical measurements on nitrogen ion-implanted diamond-like carbon films are presented. Raman scattering measurements, which probe the crystallinity of the film surface, indicate that nitrogen implantation reduces the finite crystallographic order in the pristine carbon films. The absence of molecular vibrations in the infrared absorption spectra of the films argues against a polymeric structure of the ion-implanted films. Spectroscopic ellipsometry experiments determine the change in the optical constants of the carbon film due to nitrogen implantation. Electrical de conductivity measurements are interpreted within the framework of a schematic density of states picture of graphitic τ-electrons in an amorphous carbon system. Taken collectively, the optical and electrical measurements suggest that nitrogen implantation increases the density of localized states within the 1.5 eV bandgap of the quasi-amorphous carbon film, thereby reducing the bandgap and increasing the conductivity of the nitrogen-implanted films.

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