Structure, mechanical and corrosion properties of DC reactive magnetron sputtered aluminum nitride (AlN) hard coatings on mild steel substrates
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
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| Title |
Structure, mechanical and corrosion properties of DC reactive
magnetron sputtered aluminum nitride (AlN) hard coatings
on mild steel substrates
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| Creator |
Subramanian, B.
Ashok, K. Jayachandran, M. |
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| Subject |
Electrochemical Materials Science
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| Description |
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.
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| Publisher |
Springer Science+Business Media B.V.
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| Date |
2008
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/228/1/075-2008.pdf
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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| Relation |
http://cecri.csircentral.net/228/
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