Effect of Size of Multiwalled Carbon Nanotubes Dispersed in Gear Oils for Improvement of Tribological Properties

<table class="fixed-width table-group" id="tab6"><tr><td><table class="table"><colgroup><col style="width:19.93em"/><col style="width:11.49em"/><col style="width:6.85em"/><col style="width:7.63em"/></colgroup><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr class="thead"><td class="align_left">Test oil</td><td class="align_center">Last non seizure load, kgf</td><td class="align_center">weld load, kgf</td><td class="align_center">load wear index</td></tr><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr><td class="align_left">Base lubricant (EP 140 transmission oil)</td><td class="align_center">120</td><td class="align_center">250</td><td class="align_center">64.82</td></tr><tr><td class="align_left">Base lubricant + long MWCNTs</td><td class="align_center">120</td><td class="align_center">315</td><td class="align_center">69.54</td></tr><tr><td class="align_left">Base lubricant +5 hour Ball milled MWCNTs</td><td class="align_center">140</td><td class="align_center">315</td><td class="align_center">71.23</td></tr><tr><td class="align_left">Base lubricant + 10 hour Ball milled MWCNTs</td><td class="align_center">140</td><td class="align_center">400</td><td class="align_center">75.65</td></tr><tr><td class="align_left">Base lubricant +20 hour Ball milled MWCNTs</td><td class="align_center">120</td><td class="align_center">250</td><td class="align_center">72.81</td></tr><tr class="table-tr"><td colspan="4"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Results of EP test conducted as per ASTM D 2783.</div>

Advances in Tribology

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Table 6

Table 6: Effect of Size of Multiwalled Carbon Nanotubes Dispersed in Gear Oils for Improvement of Tribological Properties 