The dynamic behavior of thin-film lubricants

Author

Jhon, Myung S. ; Phillips, David M. ; Vinay, Stephen J. ; Messer, Christopher T.

Author_Institution

Dept. of Chem. Eng., Carnegie Mellon Univ., Pittsburgh, PA, USA

Volume

35

Issue

5

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

2334

Lastpage

2337

Abstract

The dynamic behavior of thin perfluoropolyether (PFPE) films is critically reviewed. A methodology for extracting spreading information from scanning microellipsometry (SME) experiments to investigate the replenishment characteristics of various PFPEs on silica and carbon surfaces is presented. Furthermore, the relationship among SME measurements, surface energy (or disjoining pressure), rheology, and tribology is discussed. Maxwell´s equal area construction is introduced into the disjoining pressure-height isotherm to correlate surface energy with the SME profile. There is a qualitative correlation at small height (h), which becomes inconsistent as h becomes large, Examples with hydrogenated and nitrogenated carbon overcoat films are used to illustrate this point

Keywords

diffusion; lubrication; magnetic recording; polymer films; protective coatings; rheology; surface energy; C; Si; carbon surfaces; diffusion coefficients; disjoining pressure; dynamic behavior; magnetic disc coatings; perfluoropolyether; replenishment characteristics; rheology; scanning microellipsometry; silicon surfaces; surface energy; thin-film lubricants; tribology; Chemical engineering; Data mining; Data storage systems; Decision support systems; Lubricants; Magnetic films; Rheology; Silicon compounds; Transistors; Tribology;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.800818

Filename

800818