Tribological Performance of Hybrid PTFE/Nano-EG Composites Reinforced with Nanoparticles

Abstract:

The tribological tests were conducted on several PTFE/nano-EG solid self-lubricating composites filled with different nano-particles such as nano-Al2O3, nano-copper, nano-SiO2 and nano-TiO2. The Friction coefficient, wear rate, worn surface morphology and transfer film were studied. It was found that the present filler additions can remarkably increase wear resistance in all composites researched in the paper. The friction coefficients of these composites were lower than that of pure PTFE. The experimental results indicate that the enhancement effect of nano-particles effectively improved anti-friction and wear resistance of these composites. The highest wear resistance was found for composites containing (a) 10%nano-EG+10%Al2O3, (b) 10% nano-EG + 20% nano-Cu and (c) 10%nano-EG+nano-SiO2. Scanning electron microscopy (SEM) and optical microscope (OM) were utilized to examine the worn surface of PTFE-based composite and transfer film generated on counterface. Also, the dominant wear mechanisms and mode of failure were studied.

• Periodical: Applied Mechanics and Materials (Volumes 29-32)
• Pages: 395-400
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.29-32.395
• Online since: August 2010
• Authors: Zhi Ning Jia, Yu Lin Yang, Bing Li Fan
• Keywords: Friction, Nanoparticle, Polymer-Based Nanocomposite, PTFE, Transfer Film, Wear

References

[1] Zsidai L, Baets P. D and Samyn P. The tribological behavior of engineering plastics during sliding friction investigated with small-scale specimens. Wear, 253 (2002) pp.673-88.

DOI: 10.1016/s0043-1648(02)00149-7

[2] Jia J. H, Zhou H. D and Gao S. Q. A comparative investigation of the friction and wear behavior of polyimide composites under dry sliding and water lubricated condition. Mater. Sci. Eng. A, 356 (2003) pp.48-53.

DOI: 10.1016/s0921-5093(03)00052-2

[3] Khedkar J, Negulescu I and Meletis E. I. Sliding wear behavior of PTFE composites. Wear, 252 (2002) pp.361-369.

DOI: 10.1016/s0043-1648(01)00859-6

[4] Bijwe J, Rajesh J. J and Jeyakumar A. Influence of solid lubricants and fiber reinforcement on wear behavior of polyethersulphone. Tribol. Int., 33 (2000) pp.697-706.

DOI: 10.1016/s0301-679x(00)00104-3

[5] Cenna A. A, Dastoor P and Beehag A. Effects of graphite particle addition upon the abrasive wear of polymer surfaces. J. Mater. Sci., 36 (2001) pp.891-900.

[6] W. Gregory Sawyer, Kevin D. Freudenberg and Praveen Bhimaraj. A study on the friction and wear behavior of PTFE filled with alumina nanoparticles. Wear, 254 (2003) pp.573-580.

DOI: 10.1016/s0043-1648(03)00252-7

[7] F. Li, K. Hu and J. Li. The friction and wear of nanometer ZnO filled polytetrafluoroethylene. Wear, 249 (2002) pp.877-882.

DOI: 10.1016/s0043-1648(01)00816-x

[8] G. Zhang, H. Liao and H. Li. On Dry Sliding friction and wear behavior of PEEK and PEEK/SiC-composite coatings. Wear, 260 (2006) pp.594-600.

DOI: 10.1016/j.wear.2005.03.017

[9] Bahadur S and Polineni VK. Tribological studies of glass fabric reinforced polyamide compo -sites filled with CuO and PTFE. Wear, 200 (1996) pp.95-104.

DOI: 10.1016/s0043-1648(96)07327-9

[10] Bahadur S and Gong D. Investigation of the influence of CaS, CaO, and CaF2 fillers on the transfer and wear of nylon by microscopy and XPS analysis. Wear 197 (1996): 271-279.

DOI: 10.1016/0043-1648(96)06985-2

[11] Yulin YANG and Zhining JIA. Tribological behaviors of PTFE-based composites filled with nanoscale lamellar structure expanded graphite. Accepted by ASME Journal of Tribology.

DOI: 10.1115/1.4001546

[12] S. Bahadur and C. Sunkara. Effect of transfer film structure, composition and bonding on the tribological behavior of polyphenylene sulfide filled with nanoparticles of TiO2, ZnO, CuO and SiC. Wear, 258 (2005) pp.1411-1421.

DOI: 10.1016/j.wear.2004.08.009