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Friction, wear and elasto-plastic stress analysis of rf-sputtered carbon-nitrogen protective coatings for rigid magnetic storage disks

Authors
Journal
Journal of Magnetism and Magnetic Materials
0304-8853
Publisher
Elsevier
Publication Date
Volume
120
Identifiers
DOI: 10.1016/0304-8853(93)91350-g

Abstract

Abstract Thin carbon protective coatings were deposited on rigid magnetic disks by rf diode sputtering using a mixture of argon and nitrogen gases. A continuous drag test with thin-film head sliders was used to evaluate the performance of carbon coatings. Results significantly show that the carbon-nitrogen coatings have better wear performance than pure argon-sputtered carbon coatings. In addition, an elasto-plastic analysis of the stress distribution strongly indicates that wear damage should more readily occur in carbon overcoats containing large graphite particles and that a durable carbon coating should have a higher percentage of sp 3 bonding.

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