Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5459276 | Journal of Alloys and Compounds | 2017 | 26 Pages |
Abstract
Mutilation of various industrial devices like rechargeable-batteries, magnetic-recording heads from corrosion and wear can be protected by carbon coatings on nickel surface. This article presents a comprehensive study of the corrosion, magnetic and tribological behaviour of electrophoretically deposited Ni with the carbonaceous reinforcements, i.e. diamond (Ni-D), carbon nanotubes (Ni-CNT) and graphene (Ni-Gr). Enhanced corrosion resistance of Ni-D coating (1920 Ω cm2) than that of pure Ni (552 Ω cm2) and permanent magnetism with higher magnetic coercivity (413.56 Oe), compared to that of Ni-CNT (132.91 Oe), Ni-Gr (124.63 Oe) and pure Ni (129.07 Oe) coatings, is linked through the interfacial anchoring via distribution of the reinforcements. Enhanced magnetic coercivity and remanence of Ni-D coating is attributed to a wider domain wall width (1.65 μm) which has enhanced magnetostatic energy per unit area near the surface (3.16 erg/cm2) compared to that of CNT (2.25 erg/cm2) and graphene (0.94 erg/cm2). Moreover, compressive stress (â611 MPa) existing in Ni-D coating have shown to seal the micro-cavities restricting the onset of corrosion and wear. With an enhanced corrosion resistance, magnetism and frictional resistance (reduced coefficient-of-friction, scratch wear volume and high scratch hardness), Ni-D coatings can be effectually applicable for batteries, marine, automotive and aerospace industries.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Shikha Awasthi, Sarvesh Kumar Pandey, Abhishek Juyal, Chandra Prabha Pandey, Kantesh Balani,