Friction force measurements and modeling in hard disk drives Conference Paper

abstract

• Friction in a head disk interface (HDI) is investigated considering the surface energy of the lubricant and the type of carbon overcoat (COC). Perfluoropolyether Z-Tetraol lubricant with A20H additive is applied on two types of COC (type-A and type-B) with lubricant thicknesses in the range of 11-19 . The polar and dispersive components of the surface energy are measured from contact angle experiments. For each case, friction is measured using actual hard disk drives, and they are compared with the measured surface energy values of the disk samples. As the lubricant thickness increases, both the surface energy and friction decrease. Comparing friction and surface energy values for the two types of COC disks, type-A disks are found to exhibit lower surface energy and higher friction at all lubricant thicknesses. This is attributed to the effects of surface roughness, surface energy of the COC film, and lubricant interactions. 2007 IEEE.

authors

• Polycarpou, Andreas

published proceedings

• IEEE TRANSACTIONS ON MAGNETICS

author list (cited authors)

• Yeo, C., Sullivan, M., Lee, S., & Polycarpou, A. A.

citation count

• 9

complete list of authors

• Yeo, Chang-Dong||Sullivan, Michael||Lee, Sung-Chang||Polycarpou, Andreas A

publication date

• January 2008

publisher

• Institute of Electrical and Electronics Engineers (IEEE)  Publisher

published in

• IEEE Transactions on Magnetics  Journal

keywords

• Friction
• Head Disk Interface
• Roughness
• Surface Energy

Digital Object Identifier (DOI)

• 10.1109/TMAG.2007.911040

start page

• 157

end page

• 162

volume

• 44

issue

• 1

URL

• http://dx.doi.org/10.1109/tmag.2007.911040

user-defined tag

• 7 Affordable and Clean Energy