Subramanian, B. and Ashok, K. and Jayachandran, M. (2008) Structure, mechanical and corrosion properties of DC reactive magnetron sputtered aluminum nitride (AlN) hard coatings on mild steel substrates. Journal of Applied Electrochemistry, 38 (5). pp. 619-625.

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Abstract

Aluminum nitride (AlN) coatings of about 2 lm thick were deposited on mild steel (MS) by means of direct current (DC) reactive magnetron sputtering. AlN coatings were prepared in an Ar + N2 gas mixture and their crystal structure, microstructure, and topography were analyzed by X-ray diffractometry (XRD), scanning electron microscopy (SEM) and atomic force microscopy (AFM), respectively. XRD revealed that the films are polycrystalline in nature and have a hexagonal wurtzite structure with a predominant peak observed along the (002) plane. SEM and AFM images showed the presence of continuously covered pebble like spherical grains on the surface. These coatings showed lower coefficient of friction and excellent wear resistance compared to the bare MS substrate. The potentiodynamic polarization studies showed lower corrosion current density and higher polarization resistance for the AlN/MS structure than the uncoated MS substrate.

Item Type:	Article
Uncontrolled Keywords:	Physical vapor deposition; Magnetron sputtering; Aluminum Nitride; Hard coatings; Corrosion resistance
Subjects:	Electrochemical Materials Science
Divisions:	UNSPECIFIED
Depositing User:	ttbdu cecri
Date Deposited:	17 Jan 2012 14:23
Last Modified:	17 Jan 2012 14:23
URI:	http://cecri.csircentral.net/id/eprint/228

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