Tribo-chemistry at the head/disk interface

Author

Bhatia, C.Singh ; Fong, Walton ; Chen, Chao-Yuan ; Wei, Jianjun ; Bogy, David B. ; Anders, Simone ; Stammler, Thomas ; Stöhr, Joachim

Author_Institution

IBM Corp., San Jose, CA, USA

Volume

35

Issue

2

fYear

1999

fDate

3/1/1999 12:00:00 AM

Firstpage

910

Lastpage

915

Abstract

Tribo-chemical studies at the head/disk interface (HDI) were conducted on hydrogenated (CH_x), nitrogenated (CN_x), and cathodic-arc amorphous hard carbon disk samples coated with perfluoropolyether ZDOL and X1P/ZDOL lubricant. The studies involved drag tests with uncoated and carbon-coated Al₂O₃-TiC sliders and thermal desorption experiments in an ultra-high vacuum (UHV) tribochamber followed with a surface chemistry analysis by X-ray Photo Emission Electron Microscopy (X-PEEM) and Near Edge X-ray Absorption Fine Structure (NEXAFS) spectroscopy. The friction and catalytic decomposition mechanisms of ZDOL are described, as well as the tribo-chemical performance of cathodic-arc carbon overcoats coated with ZDOL, and data demonstrating the chemical alteration of the lubricant and carbon overcoat are also presented

Keywords

hard discs; lubrication; magnetic heads; surface chemistry; Al₂O₃-TiC; Al₂O₃-TiC slider; C; C:H; C:N; NEXAFS; X-PEEM; X1P/ZDOL; ZDOL; carbon overcoat; catalytic decomposition; cathodic-arc amorphous carbon; drag testing; friction; hard disk; head/disk interface; hydrogenated amorphous carbon; lubricant; nitrogenated amorphous carbon; perfluoropolyether coating; surface chemistry analysis; thermal desorption; tribochemistry; ultra-high vacuum tribochamber; Amorphous materials; Carbon dioxide; Chemistry; Electromagnetic wave absorption; Electron emission; Electron microscopy; Friction; Lubricants; Spectroscopy; Testing;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.753807

Filename

753807