Tribology Online
Online ISSN : 1881-2198
ISSN-L : 1881-218X
Article
Effect of Graphite Concentration on the Tribological and Mechanical Properties of Filled SU-8 Polymer
Jitendra K KatiyarSujeet K SinhaArvind Kumar
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JOURNAL FREE ACCESS

2016 Volume 11 Issue 2 Pages 152-158

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Abstract

Different concentrations of graphite powder (particle size < 20 μm) were added for the enhancement in mechanical and tribological properties of SU-8 polymer. The materials were studied as thick coatings with thickness in the range of ~ 35-40 μm on glass substrate. SU-8 and SU-8/graphite composite properties were examined using atomic force microscope (for nanoindentation test) and pin-on-disc tribometer (for friction and wear). The surface characteristics were studied using Optical Microscope, Goniometer and 3D Profilometer. At 10 and 20 wt% graphite concentration, it was found that several properties were enhanced such as elastic modulus ~ 2.2 times, marginal increment in hardness and approximately same water contact angle and same surface free energy (SFE) as compared with those of pure SU-8. More importantly, 10 wt% graphite concentration has given two-times lower steady-state coefficient of friction and ~ 10 times more wear life compared to those of pure SU-8. The 20 wt% composite gave higher coefficient of friction but lower wear rate than the 10 wt% composite.

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© 2016 by Japanese Society of Tribologists
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