Study of the Thermal Decomposition of PFPEs Lubricants on a Thin DLC Film Using Finitely Extensible Nonlinear Elastic Potential Based Molecular Dynamics Simulation

Joint Authors

Deb Nath, S. K.
Wong, C. H.

Source

Journal of Nanotechnology

Issue

Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-15, 15 p.

Publisher

Hindawi Publishing Corporation

Publication Date

2014-07-06

Country of Publication

Egypt

No. of Pages

15

Main Subjects

Chemistry

Abstract EN

Perfluoropolyethers (PFPEs) are widely used as hard disk lubricants for protecting carbon overcoat reducing friction between the hard disk interface and the head during the movement of head during reading and writing data in the hard disk.

Due to temperature rise of PFPE Zdol lubricant molecules on a DLC surface, how polar end groups are detached from lubricant molecules during coating is described considering the effect of temperatures on the bond/break density of PFPE Zdol using the coarse-grained bead spring model based on finitely extensible nonlinear elastic potential.

As PFPE Z contains no polar end groups, effects of temperature on the bond/break density (number of broken bonds/total number of bonds) are not so significant like PFPE Zdol.

Effects of temperature on the bond/break density of PFPE Z on DLC surface are also discussed with the help of graphical results.

How bond/break phenomenonaffects the end bead density of PFPE Z and PFPE Zdol on DLC surface is discussed elaborately.

How the overall bond length of PFPE Zdol increases with the increase of temperature which is responsible for its decomposition is discussed with the help of graphical results.

At HAMR condition, as PFPE Z and PFPE Zdol are not suitable lubricant on a hard disk surface, it needs more investigations to obtain suitable lubricant.

We study the effect of breaking of bonds of nonfunctional lubricant PFPE Z, functional lubricants such as PFPE Zdol and PFPE Ztetrao, and multidented functional lubricants such as ARJ-DS, ARJ-DD, and OHJ-DS on a DLC substrate with the increase of temperature when heating of all of the lubricants on a DLC substrate is carried out isothermally using the coarse-grained bead spring model by molecular dynamics simulations and suitable lubricant is selected which is suitable on a DLC substrate at high temperature.

American Psychological Association (APA)

Deb Nath, S. K.& Wong, C. H.. 2014. Study of the Thermal Decomposition of PFPEs Lubricants on a Thin DLC Film Using Finitely Extensible Nonlinear Elastic Potential Based Molecular Dynamics Simulation. Journal of Nanotechnology،Vol. 2014, no. 2014, pp.1-15.
https://search.emarefa.net/detail/BIM-1042200

Modern Language Association (MLA)

Deb Nath, S. K.& Wong, C. H.. Study of the Thermal Decomposition of PFPEs Lubricants on a Thin DLC Film Using Finitely Extensible Nonlinear Elastic Potential Based Molecular Dynamics Simulation. Journal of Nanotechnology No. 2014 (2014), pp.1-15.
https://search.emarefa.net/detail/BIM-1042200

American Medical Association (AMA)

Deb Nath, S. K.& Wong, C. H.. Study of the Thermal Decomposition of PFPEs Lubricants on a Thin DLC Film Using Finitely Extensible Nonlinear Elastic Potential Based Molecular Dynamics Simulation. Journal of Nanotechnology. 2014. Vol. 2014, no. 2014, pp.1-15.
https://search.emarefa.net/detail/BIM-1042200

Data Type

Journal Articles

Language

English

Notes

Includes bibliographical references

Record ID

BIM-1042200