Abstract
In this work, we studied a nanocomposite material made from fluoroplastic which contains 20 wt.% multi-walled nanotubes. In order to complete the present work, we have used different thermodynamic and mechanical techniques. The introduction of nanotubes in the F4 polymer matrix has completely changed the tribological and thermodynamic properties of the studied nanocomposite material. The compression strength becomes 20% higher than that of the F4 polymer matrix. Meanwhile the wear resistance achieves an order of magnitude 100 times greaterthan that of F4. Moreover, a friction coefficient is about 25% to 30% lower than that of a similar material and especially that of F4 material. Differential scanning calorimetric study showed that the glassy phase transition appears at about 330°C, which confirms that the degradation of the studied nanocomposite occurs at relatively higher temperature. This result confirms the one concerning the change in tribological properties. Dilatometric study revealed that the thermal expansion coefficient has been increased. The observed relative elongation measurement change depends on the direction along which the measurement has been done and confirms, in turn, the anisotropic character of the studied material. These results suggest that the metallic materials could be replaced by nanocomposite compounds which present good physical properties.
Highlights
The emphasis for nanocomposite materials by the scientific community and the industry continues to grow and to develop
This durability is of particular importance for friction units which operate in extreme conditions, in a hostile environment, at high temperatures, etc
Experimental In the present study, we investigate the possibility of making a new wear-resistant material in hostile environments, the nanocomposite materials (NCM) based on a fluoroplastic matrix F4 and on multi-walled carbon nanotubes (MCNT)
Summary
The emphasis for nanocomposite materials by the scientific community and the industry continues to grow and to develop. The intensification of industrial processes today is to greatly extend based on the durability of machine assembly units and equipment working in friction units This durability is of particular importance for friction units which operate in extreme conditions, in a hostile environment, at high temperatures, etc. There is the need of development of new wear-resistant materials with a low friction coefficient (kfr), high values of wear resistance with thermal conductivity, which would be resistant to hostile environments. The latter is a topical issue in our days, there is no unique solution to the cited above issue. The degree of wear was determined within the sliding distance of 1,000 m
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