Journal ArticleDOI
Corrosion and Wear Behaviors of Cr-Doped Diamond-Like Carbon Coatings
S. Viswanathan,L. Mohan,Parthasarathi Bera,V. Praveen Kumar,Harish C. Barshilia,Chinnasamy Anandan +5 more
TLDR
A combination of plasmaenhanced chemical vapor deposition and magnetron sputtering techniques has been employed to deposit chromium-doped diamond-like carbon (DLC) coatings on stainless steel, silicon and glass substrates.Abstract:
A combination of plasma-enhanced chemical vapor deposition and magnetron sputtering techniques has been employed to deposit chromium-doped diamond-like carbon (DLC) coatings on stainless steel, silicon and glass substrates. The concentrations of Cr in the coatings are varied by changing the parameters of the bipolar pulsed power supply and the argon/acetylene gas composition. The coatings have been studied for composition, morphology, surface nature, nanohardness, corrosion resistance and wear resistance properties. The changes in I
D
/I
G
ratio with Cr concentrations have been obtained from Raman spectroscopy studies. Ratio decreases with an increase in Cr concentration, and it has been found to increase at higher Cr concentration, indicating the disorder in the coating. Carbide is formed in Cr-doped DLC coatings as observed from XPS studies. There is a decrease in sp
3/sp
2 ratios with an increase in Cr concentration, and it increases again at higher Cr concentration. Nanohardness studies show no clear dependence of hardness on Cr concentration. DLC coatings with lower Cr contents have demonstrated better corrosion resistance with better passive behavior in 3.5% NaCl solution, and corrosion potential is observed to move toward nobler (more positive) values. A low coefficient of friction (0.15) at different loads is observed from reciprocating wear studies. Lower wear volume is found at all loads on the Cr-doped DLC coatings. Wear mechanism changes from abrasive wear on the substrate to adhesive wear on the coating.read more
Citations
More filters
Journal ArticleDOI
Hafnium carbide based solar absorber coatings with high spectral selectivity
TL;DR: In this article, single layer coatings of hafnium carbide were deposited on stainless steel, copper and silicon substrates by means of reactive sputtering, and the deposition process was optimized for maximum solar absorptance by varying the process parameters.
Journal ArticleDOI
The sp2-sp3 carbon hybridization content of nanocrystalline graphite from pyrolyzed vegetable oil, comparison of electrochemistry and physical properties with other carbon forms and allotropes
Humayun Kabir,Haoyu Zhu,Jeremy May,Kailash Hamal,Yuwei Kan,Thomas J. Williams,Elena Echeverria,David N. McIlroy,David Estrada,Paul H. Davis,Twinkle Pandhi,Katie M. Yocham,Kari Higginbotham,Abraham Clearfield,I. Francis Cheng +14 more
TL;DR: In this paper, the structural properties of nc-graphite were investigated with Raman and X-ray photoelectron spectroscopies, and the results indicated that this ncgraphite is in Stage-2 of Ferrari's amorphization trajectory between amorphous carbon (a-C) and graphite with a sp2/sp3 carbon ratio of 85/15.
Journal ArticleDOI
Corrosion behavior of diamond-like carbon film induced by Al/Ti co-doping
Xiaowei Xu,Xiaowei Xu,Yong Zhou,Linlin Liu,Peng Guo,Xiaowei Li,Xiaowei Li,Kwang-Ryeol Lee,Ping Cui,Ping Cui,Aiying Wang +10 more
TL;DR: In this article, a diamond-like carbon films with Al and Ti dopants (Al/Ti-DLC) were fabricated by a hybrid ion beam deposition system combined with a special design of splicing targets, in which the Al/Ti ratio was changed from 4.0 to 1.1 by tailoring the Al content.
Journal ArticleDOI
Structure and Anticorrosion, Friction, and Wear Characteristics of Pure Diamond-Like Carbon (DLC), Cr-DLC, and Cr-H-DLC Films on AZ91D Mg Alloy
TL;DR: In this article, the authors evaluated the protection against corrosion and wear afforded to AZ91D Mg alloy by coatings of hydrogen-free and low-Cr-doped hydrogenated diamond-like carbon (DLC) films.
Journal ArticleDOI
Corrosion and wear resistance properties of multilayered diamond‐like carbon nanocomposite coating
S. Viswanathan,L. Mohan,Parthasarathi Bera,S. Shanthiswaroop,M. Muniprakash,Harish C. Barshilia,Chinnasamy Anandan +6 more
TL;DR: In this paper, multilayered diamond-like carbon (DLC) nanocomposite coating has been applied on silicon and stainless steel substrates by combination of cathodic arc evaporation and magnetron sputtering.
References
More filters
Journal ArticleDOI
Diamond-like amorphous carbon
TL;DR: In this paper, the authors describe the deposition methods, deposition mechanisms, characterisation methods, electronic structure, gap states, defects, doping, luminescence, field emission, mechanical properties and some applications of diamond-like carbon.
Journal ArticleDOI
Electrochemical Polarization I . A Theoretical Analysis of the Shape of Polarization Curves
Milton Stern,A. L. Geary +1 more
TL;DR: In this paper, a linear dependence of potential on applied current is described for a corroding electrode by treating it in a manner analogous to that for a non-corroding electrode, and an equation is derived relating the slope of this linear region to the corrosion rate and Tafel slopes.
Journal ArticleDOI
Resonant Raman spectroscopy of disordered, amorphous, and diamondlike carbon
Andrea C. Ferrari,John Robertson +1 more
TL;DR: In this article, the dispersion of peak positions and intensities with excitation wavelength is used to understand the nature of resonant Raman scattering in carbon and how to derive the local bonding and disorder from the Raman spectra.
Journal ArticleDOI
Diamond-like carbon: state of the art
TL;DR: A review of the state of the art of the preparation of diamond-like carbon films, the characterization and understanding of their properties, and their practical applications can be found in this article.