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Carbon Nanotube Reinforced Composites: Metal and Ceramic ...

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Figure 4.19 Friction coefficient vs applied load for electrodeless<br />

deposited Ni/MWNT coatings. Reproduced with permission<br />

from [47]. Copyright Ó (2006) Elsevier.<br />

1.1 g /L 1 CNTexhibits the lowest friction coefficient <strong>and</strong> wear rate. It is evident that<br />

the tribological properties of Ni can be enhanced by increasing the nanotube<br />

content in the deposit. A similar beneficial effect of CNTs in improving the wear<br />

resistance of Ni-P coating has been reported in the literature [48, 49]. Wang et al.<br />

deposited Ni-P/MWNT nanocomposite coating onto a carbon steel substrate in<br />

which the MWNTs were shortened by ball milling prior to deposition [49]. The dry<br />

sliding pin-on-disk measurement revealed that the friction coefficient of electro-<br />

Figure 4.20 Wear volume vs applied load for electrodeless<br />

deposited Ni/MWNT coatings. Reproduced with permission<br />

from [47]. Copyright Ó (2006) Elsevier.<br />

4.4 Wearj125

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