Micro-corrosion of ultra thin DLC films in magnetic recording disk

An Hung Tan, C. H. Chen, C. K. Lee, S. L. Lee

研究成果: 會議貢獻類型會議論文同行評審

摘要

The micro-corrosion correlates to mechanical properties, electrical resistivity and lubricant bonded ratio of DLC overcoats on different disks of various surface roughness were investigated. DLC overcoats of hydrogenated carbon (CH) and nitrogenated carbon (CN) films were deposited by ion beam deposition (IBD) and sputter, respectively. Results show the intensity ratio I(D)/I(G) increases with decreasing IBD-CH film thickness and increasing N2 concentration of sputtered-CN layer, which implies that the films prepared at higher N2 concentration contain a relatively lower sp3 bonded carbon. The composite hardness and Young's modulus of DLC films decrease with decreasing IBD-CH thickness and increasing N2 concentration of sputtered-CN layers. Compared to disk overcoats deposited with only IBD-CH of comparable thickness, the lubricant bonded ratio is dramatically increased from 12 to 30% when the 0.5 nm CN is deposited on IBD-CH film. By Increasing the N2 concentration in the CN layer from 10 to 50 at.%, the electrical resistivity decreased from 3.6 to 0.8 kilohms and the lubricant bonded ratio increased from 30 to 46%. The corrosion spots density of sputtered-CN film surface decreases with increasing N2 concentration. It is concluded that the dual layer of 1.5 nm IBD-CH/0.5 nm sputtered-CN with 30% N2 deposition has the best integrated performance of corrosion resistance and CSS tribological properties.

原文???core.languages.en_GB???
頁面539
頁數1
出版狀態已出版 - 2008
事件European Corrosion Congress: Managing Corrosion for Sustainability, EUROCORR 2008 - Edinburgh, United Kingdom
持續時間: 7 9月 200811 9月 2008

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???event.eventtypes.event.conference???European Corrosion Congress: Managing Corrosion for Sustainability, EUROCORR 2008
國家/地區United Kingdom
城市Edinburgh
期間7/09/0811/09/08

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