Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.diamond.2014.02.011
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dc.titleBi-level surface modification of hard disk media by carbon using filtered cathodic vacuum arc: Reduced overcoat thickness without reduced corrosion performance
dc.contributor.authorYeo, R.J.
dc.contributor.authorRismani, E.
dc.contributor.authorDwivedi, N.
dc.contributor.authorBlackwood, D.J.
dc.contributor.authorTan, H.R.
dc.contributor.authorZhang, Z.
dc.contributor.authorTripathy, S.
dc.contributor.authorBhatia, C.S.
dc.date.accessioned2014-10-07T04:24:17Z
dc.date.available2014-10-07T04:24:17Z
dc.date.issued2014
dc.identifier.citationYeo, 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
dc.identifier.issn09259635
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/82008
dc.description.abstractThe 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.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/j.diamond.2014.02.011
dc.sourceScopus
dc.subjectCarbon overcoat
dc.subjectCorrosion
dc.subjectHead-disk interface
dc.subjectSurface modification
dc.typeArticle
dc.contributor.departmentMATERIALS SCIENCE AND ENGINEERING
dc.contributor.departmentELECTRICAL & COMPUTER ENGINEERING
dc.description.doi10.1016/j.diamond.2014.02.011
dc.description.sourcetitleDiamond and Related Materials
dc.description.volume44
dc.description.page100-108
dc.description.codenDRMTE
dc.identifier.isiut000335272800015
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