Deposition and characterization of diamond-like nanocomposite coatings grown by plasma enhanced chemical vapour deposition over different substrate materials

Abstract

Diamond-like nanocomposite (DLN) coatings have been deposited over different substrates used for biomedical applications by plasma-enhanced chemical vapour deposition (PECVD). DLN has an interconnecting network of amorphous hydrogenated carbon and quartz-like oxygenated silicon. Raman spectroscopy, Fourier transform-infra red (FT-IR) spectroscopy, transmission electron microscopy (TEM) and X-ray diffraction (XRD) have been used for structural characterization. Typical DLN growth rate is about 1 μm/h, measured by stylus profilometer. Due to the presence of quartz-like Si:O in the structure, it is found to have very good adhesive property with all the substrates. The adhesion strength found to be as high as 0•6 N on SS 316 L steel substrates by scratch testing method. The Young's modulus and hardness have found to be 132 GPa and 14•4 GPa, respectively. DLN coatings have wear factor in the order of 1 × 10 −7 mm 3 /N-m. This coating has found to be compatible with all important biomedical substrate materials and has successfully been deposited over Co-Cr alloy based knee implant of complex shape.

Antireflective Nanocomposite Based Coating on Crystalline Silicon Solar Cells for Building-Integrated Photovoltaic Systems

“…The growth rate of DLN films typically varies from 1.0 to 3.0 m/hr and depends on a number of factors. The details experimental procedure has already mentioned in the author's published paper [6,7]. By changing deposition conditions, the optical properties of DLN film can be varied over a wide range.…”

“…However, access to efficient, but differently colored, solar cells is important for the further development of BIPV system. In this paper, we have used Diamond-like nanocomposite layer [5][6][7] as an Antireflective Nanocomposite Based (ARNAB) coating material for crystalline silicon solar cell, and the impact of varying the color of an ARC upon the optical characteristics and efficiency of a solar cell is investigated. The overall transmittance and reflectance of a set of differently colored single layer ARCs are compared with multilayered ARNAB coating, all made using DLN layer deposition by PACVD technique.…”