Please use this identifier to cite or link to this item:
|Title:||Bi-level surface modification of hard disk media by carbon using filtered cathodic vacuum arc: Reduced overcoat thickness without reduced corrosion performance||Authors:||Yeo, R.J.
|Issue Date:||2014||Citation:||Yeo, R.J., Rismani, E., Dwivedi, N., Blackwood, D.J., Tan, H.R., Zhang, Z., Tripathy, S., Bhatia, C.S. (2014). Bi-level surface modification of hard disk media by carbon using filtered cathodic vacuum arc: Reduced overcoat thickness without reduced corrosion performance. Diamond and Related Materials 44 : 100-108. ScholarBank@NUS Repository. https://doi.org/10.1016/j.diamond.2014.02.011||Abstract:||The corrosion performance of commercial hard disk media which was subjected to bi-level surface modification has been reported. The surface treatment was carried out by bombarding the surface of the magnetic media with C+ ions at 350 eV followed by 90 eV using filtered cathodic vacuum arc (FCVA). The energy and embedment depth of the impinging C+ ions were adjusted by applying an optimized bias to the substrate and simulated by a Stopping and Range of Ions in Matter (SRIM) code which predicted the formation of a graded atomically mixed layer at the carbon-media interface. Cross-section transmission electron microscopy (TEM) revealed the formation of a 1.8 nm dense nano-layered carbon overcoat structure on the surface of the media. Despite an ~ 33% reduction in the thickness, the bi-level surface modified disk showed corrosion performance similar to that of a commercially manufactured disk with a thicker carbon overcoat of 2.7 nm. This improvement in the corrosion/oxidation resistance per unit thickness can be attributed to the formation of a dense and highly sp3 bonded carbon layer, as revealed by X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy. This study demonstrates the effectiveness of the bi-level surface modification technique in forming an ultra-thin yet protective overcoat for future hard disks with high areal densities. © 2014 Elsevier B.V.||Source Title:||Diamond and Related Materials||URI:||http://scholarbank.nus.edu.sg/handle/10635/82008||ISSN:||09259635||DOI:||10.1016/j.diamond.2014.02.011|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Oct 18, 2021
WEB OF SCIENCETM
checked on Oct 18, 2021
checked on Oct 14, 2021
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.