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Author Qian Guo ♦ Pil Seung Chung ♦ Jhon, M.S.
Sponsorship IEEE Magnetics Society
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©1965
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics ♦ Electricity & electronics ♦ Technology ♦ Engineering & allied operations ♦ Applied physics
Subject Keyword Lubricants ♦ Stress ♦ Tribology ♦ Hysteresis ♦ Solids ♦ Nonlinear equations ♦ Chemical engineering ♦ Data storage systems ♦ Chemical technology ♦ Fluid dynamics ♦ viscoelasticity ♦ Compression and tension ♦ head-disk interface ♦ hysteresis ♦ lubricant pick-up ♦ molecular dynamics ♦ nano-mechanics
Abstract As the head-disk spacing decreases, the contact mechanics between the head and disk becomes one of the critical issues for the head-disk tribology integration. In this paper, molecular dynamics (MD) is employed to simulate the nano-mechanics (i.e., "compression" and "tension") of confined molecularly thin perfluoropolyether (PFPE) films to examine the contact tribology fundamentals. For the "compression" process, functional PFPE demonstrates slightly higher clearance than nonfunctional PFPE; while during the "tension" process, an apparent fluid bridge was observed for functional PFPE. The normal stress profiles were calculated for both "compression" and "tension" processes, where the hysteresis phenomenon indicates the irreversible nature of functional PFPE nano-mechanics. N-modes Maxwell model was then further introduced to analyze the nano-mechanics relaxation process, suggesting that a second relaxation mode in the two-mode Maxwell model was induced by functional endgroups.
Description Author affiliation :: Dept. of Chem. Eng., Carnegie Mellon Univ., Pittsburgh, PA
ISSN 00189464
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2008-11-01
Publisher Place U.S.A.
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Volume Number 44
Issue Number 11
Size (in Bytes) 565.32 kB
Page Count 4
Starting Page 3698
Ending Page 3701


Source: IEEE Xplore Digital Library