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Title: Energy gradient carbon embedding in the magnetic media for improved tribological performance
Authors: Abdul Samad, M.
Rismani, E.
Kwek, W.M.
Bhatia, C.S. 
Keywords: Cobalt
Magnetic data disks
Magnetic data storage
Surface modification
Issue Date: 15-Mar-2014
Citation: Abdul Samad, M., Rismani, E., Kwek, W.M., Bhatia, C.S. (2014-03-15). Energy gradient carbon embedding in the magnetic media for improved tribological performance. Surface and Coatings Technology 242 : 152-156. ScholarBank@NUS Repository.
Abstract: A technique of energy gradient carbon embedding using the filtered cathodic vacuum arc technique in the top layer of the magnetic media is evaluated for its tribological properties. Cobalt is used as the magnetic material. The embedded layer is obtained by using ion energies of 60. eV and 90. eV successively to embed carbon in the top layer of the magnetic media and seal the Co/C mixed layer with a few mono-layers of carbon. Auger electron spectroscopy and transmission electron microscopy are used to characterize the modified surface in terms of its thickness, structure and chemical composition. Ball-on-disk wear tests and atomic force microscopy based scratch tests are conducted on the bare cobalt and modified cobalt surfaces to characterize the wear resistance. It is observed that the wear life and scratch resistance of the cobalt surface improved considerably after the surface modification. © 2014 Elsevier B.V.
Source Title: Surface and Coatings Technology
ISSN: 02578972
DOI: 10.1016/j.surfcoat.2014.01.035
Appears in Collections:Staff Publications

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