scholarly journals HDI tribology characteristics of PFPE lubricants with different main-chains on magnetic disks

2020 ◽  
Vol 2020 (0) ◽  
pp. S16101
Author(s):  
Hiroshi TANI ◽  
Tsuyoshi SHIMIZU ◽  
Ryosuke SAGATA ◽  
Renguo LU ◽  
Shinji KOGANEZAWA ◽  
...  
Keyword(s):  
Magnetic Disks ◽  
Pfpe Lubricants

Comparisons of Friction Characteristics of a Lightly Loaded Pin Sliding Over Magnetic Disks Coated With Polar and Non-Polar PFPE Lubricants

2005 ◽  
Author(s):  
Yinbo He ◽  
Yasunaga Mitsuya ◽  
Hedong Zhang ◽  
Kenji Fukuzawa
Keyword(s):  
Friction Force ◽  
Gradual Increase ◽  
Rotating Disk ◽  
Disk Surface ◽  
Lubricant Film ◽  
Magnetic Disks ◽  
Friction Tester ◽  
Pin On Disk ◽  
End Group ◽  
Pfpe Lubricants

This paper deals with the measurement of friction force exerted on molecularly thin lubricant film surfaces using a specially arranged pin-on-disk type friction tester. The measurements were carried out by sliding a 1.5-mm-diameter glass ball slider on a rotating disk surface with small loading force. Polar and non-polar PFPE lubricants were dip-coated on magnetic disks covered with diamond-like-carbon (DLC) film. Lubricant film thickness was varied to constitute multiple layered film structures on the DLC surface. To clarify the stratified effect of thin lubricant film on friction, a lightly loading force and a slow rotational speed were selected. The tested results showed that the friction force on non-polar lubricant surfaces increase slightly for mono-layer and multi-layer cases, while the friction force on polar lubricants show steady and gradual increase with increasing loading force. We conclude that friction force at small loading force is dependent intimately on the thickness, molecular weight and end-group functionality.

Evaluations of tribological characteristics of PFPE lubricants on DLC surfaces of magnetic disks

2007 ◽  
Vol 27 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Y. He ◽  
Y. Fujikawa ◽  
H. Zhang ◽  
K. Fukuzawa ◽  
Y. Mitsuya
Keyword(s):  
Tribological Characteristics ◽  
Magnetic Disks ◽  
Pfpe Lubricants

Comparison study on surface and thermo-chemical properties of PFPE lubricants on DLC film through MD simulations

2021 ◽  
Vol 156 ◽  
pp. 106835
Author(s):  
Jingan Song ◽  
Sujoy Talukder ◽  
Shahriar Mufid Rahman ◽  
Yeonjin Jung ◽  
Chang-Dong Yeo
Keyword(s):  
Chemical Properties ◽  
Md Simulations ◽  
Comparison Study ◽  
Dlc Film ◽  
Pfpe Lubricants

Enhanced Photo-Thermal Stability of Modified PFPE Lubricants Under Laser Beam Exposure

2011 ◽  
Vol 47 (7) ◽  
pp. 1849-1854 ◽  
Author(s):  
M. Gauvin ◽  
H. Zheng ◽  
B. Suen ◽  
J. Lee ◽  
H. J. Kang ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Laser Beam ◽  
Thermal Stability Of ◽  
Pfpe Lubricants

Tribological implications of solvents in dip-coating lubrication of thin film magnetic disks

1996 ◽  
Vol 32 (5) ◽  
pp. 3699-3701 ◽  
Author(s):  
C. Gao ◽  
Y.C. Lee ◽  
J. Chao ◽  
M. Russak
Keyword(s):  
Thin Film ◽  
Dip Coating ◽  
Magnetic Disks

Microtribological properties of hard amorphous carbon protective coatings for thin-film magnetic disks and heads

1997 ◽  
Vol 211 (4) ◽  
pp. 365-372 ◽  
Author(s):  
V N Koinkar ◽  
B Bhushan
Keyword(s):  
Amorphous Carbon ◽  
Carbon Coating ◽  
Protective Coatings ◽  
Ion Beam ◽  
Crystal Silicon ◽  
Carbon Coatings ◽  
Magnetic Disks ◽  
Hydrogenated Amorphous Carbon ◽  
Hydrogenated Amorphous ◽  
Cathodic Arc

For long durability of magnetic media and head sliders, protective overcoats of hydrogenated amorphous carbon (a-C:H) are generally used. In this study, microtribological studies of hydrogenated amorphous carbon coatings deposited on a single-crystal silicon using three different deposition techniques—sputtering, ion beam and cathodic arc—were studied using atomic force/friction force microscopy (AFM/FFM). Roughnesses of all coatings at two scan sizes of 1 μm × 1 μm and 10 μm × 10 μm are comparable. Surface topography of sputtered carbon coating shows some particulates on the surface. Cathodic arc carbon coating exhibits the lowest coefficient of friction value followed by ion beam and sputtered carbon coatings. Microscratch and wear resistance and nanohardness of cathodic arc carbon coating are superior to those of ion beam and sputtered carbon coatings. Cathodic arc deposited carbon coatings are potential candidates for magnetic disks and heads.

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