Comparison of Wear and Friction Performance of Graphite filled PTFE and PTFE Filled Polyamide Polymers for Bearing Applications

Year 2021, Volume: 25 Issue: 2, 335 - 344, 20.08.2021

Hüseyin Ünal , Salih Hakan Yetgin

https://doi.org/10.19113/sdufenbed.841994

Cited By: 1

Abstract

This study was carried out to compare the tribological performances of 35wt.% graphite-added polytetrafluoroethylene (35G/PTFE) composite and 10wt.%PTFE filled polyamide 6 (10PTFE/PA6) polymer blend at different speeds used in rolling bearing applications. Tribological tests were carried out on a pin-on-disc wear test rig at the sliding speeds of 1.0, 1.5 and 2.0m / and under the loads of 50N and 150N. Tests were conducted against AISI 316L stainless steel disc material under dry sliding conditions at room temperature. As a result of the wear and friction tests, it was observed that the coefficient of friction values of both materials used in the experiments was slightly affected by the increase in sliding speed, while the wear volume and wear rate values increased. As a result of the obtained data, the wear rate of 35wt.% graphite filled PTFE composite is between 2.70 and 3.67x10-14 m2/N, while the wear rate of 10wt.% PTFE filled PA6 polymer blend is 5.07 to15.5x10-14 m2/N. 35% graphite filled PTFE composite was found to be average 62% wear resistant than that of 10wt.%PTFE filled PA6 polymer mixture.

Keywords

Polymer, Tribology, Polyamide, PTFE, Graphite

Rulmanlı Yatak Uygulamaları İçin Grafit Katkılı PTFE ve PTFE Katkılı Poliamit-6 Polimerlerinin Aşınma ve Sürtünme Performanslarının Karşılaştırılması

Abstract

Bu çalışma, rulmanlı yatak uygulamalarında kullanılan ağırlıkça %35 grafit katkılı politetrafloretilen (35G/PTFE) kompozit ve ağırlıkça %10 PTFE katkılı poliamit 6 (10PTFE/PA6) polimer karışımının farklı hızlar altındaki tribolojik performanslarının karşılaştırılması amacıyla gerçekleştirilmiştir. Tribolojik deneyler, 1.0, 1.5 ve 2.0m/s kayma hızlarında, 50N ve 150N yükler altında disk üzerinde pim olan bir aşınma test düzeneğinde gerçekleştirilmiştir. Deneyler, AISI 316L paslanmaz çelik disk malzemeye karşı kuru kayma şartları altında, oda sıcaklığında yapılmıştır. Aşınma ve sürtünme deneyleri sonucunda, kayma hızının artması ile deneylerde kullanılan her iki malzemenin sürtünme katsayısının çok az etkilendiği gözlenirken aşınma hacmi ve aşınma oranı değerlerinin arttığı gözlenmiştir. Elde edilen veriler sonucunda, %35 grafit katkılı PTFE kompozitin aşınma oranı 2.70 ile 3.67x10-14 m2/N aralığında elde edilirken %10 PTFE katkılı PA6 polimer karışımının aşınma oranını ise 5.07 ile 15.5x10-14 m2/N aralığında elde edilmiştir. %35 grafit katkılı PTFE kompozitinin aşınma oranı %10PTFE katkılı PA6 polimer karışımına göre ortalama %62 oranında daha az aşındığı tespit edilmiştir.

Keywords

Polimer, Triboloji, Poliamit, PTFE, Grafit

References

• [1] Wladyslaw, S., Slawomir, K., Adrian, B., Tomasz. K. 2018. Analysis of tribological properties of selected PTFE-based polymer composites in a sliding interaction with aluminium oxide (Al2O3). Tribologia, 4, 107-112.
• [2] Prakash, S. T., Avinash, H. S., Amit Kumar, H., Ramswamy, M. P. 2017. Effect of Graphite on Tribological Behaviour of PTFE Composites. International Journal of Innovative Research in Science, Engineering and Technology, 6(12), 22700-22705.
• [3] Raaj, K.R. A., Sriram, S., Harikiran, R. R., Yenugadhati, P. D. 2018. Experimental investigation on influence of molybdenum content on tribological properties of hybrid PTFE composite. Emerging Trends in Mechanical Engineering, AIP Conf. Proc. 2080, 020017-1–020017-7.
• [4] Mohammad, J. K., Wani, M. F. Rajat, G. 2018. Tribological properties of glass fiber filled polytetrafluoroethylene sliding against stainless steel under dry and aqueous environments: enhanced tribological performance in sea water. Mater. Res. Express, 5, 055309.
• [5] Sujuan, Y., Zeng, X. 2014. Tribological Properties of PTFE and PTFE Composites at Different Temperatures. Tribology Transactions, 57(3), 382-386.
• [6] Prashant, B. P., Deore, E. R. 2015. Friction and Wear Behaviour of PTFE & its Composite in Dry Conditions. Internatıonal Journal of Engıneerıng Research & Technology, 4(12), 306-314.
• [7] Khan, M. J., Wani, M. F., Gupta, R. 2018. Tribological properties of bronze filled PTFE under dry sliding conditions and aqueous environments (distilled water and sea water). International Journal of Surface Science and Engineering, 12(5/6). 348 - 364
• [8] Kumar, P. S., Madhu, S. V., Vaishak, V. N., Deepthi, Y. P. 2019. Experimental investigation on tribological properties of PTFE based composite. AIP Conf. Proc. 2148, 030023-1–030023-6.
• [9] Şahin, Y., Mirzayev, H. 2015. Wear characterıstıcs of polymer-based composıtes. Mechanics of Composite Materials, 51(5), 543-554.
• [10] Reza, G., Andreas A. P. 2019. Tribological performance of graphite-filled polyimide and PTFE composites in oil-lubricated three-body abrasive conditions. Wear, 436–437, 203044.
• [11] Neis, P. D., Ferreira, N. F., Poletto, J.C., Sukumaran, J., Ando, M., Zhang, Y. 2017. Tribological behavior of polyamide-6 plastics and their potential use in industrial applications. Wear, 376-377, 1391–1398.
• [12] Unal, H., Mimaroglu, A. 2012. Friction and wear performance of polyamide 6 and graphite and wax polyamide 6 composites under dry sliding conditions. Wear, 289, 132–137.
• [13] Unal, H., Esmer, K., Abdullah, M. 2013. Mechanical, electrical and tribological properties of graphite filled polyamide-6 composite materials. Journal of Polymer Engineering, 33(4), 351–355.
• [14] Umesh, G. L., Krishna Prasad, N. J., Rudresh, B. M., Lingesh, B. V. 2020. Impact of sliding load and velocity on tribological response of PTFE filled polyamide 66 and polyamide 6(PA66/PA6) blend thermoplastic composites. AIP Conference Proceedings, 2274, 030005.
• [15] Li., J. 2009. Friction and wear properties of PA6 filled PTFE composites under oil lubrication. Current Applied Physics, 9, 1445–1449.
• [16] Du-Xin, L., Yi-Lan, Y., Xin, D., Wen-Juan, L., Ying, X. 2013. Tribological properties of solid lubricants filled glass fiber reinforced polyamide 6 composites. Materials & Design, 46, 809-815.
• [17] Kumar, S. S., Kanagaraj, G. 2016. Investigation on Mechanical and Tribological Behaviors of PA6 and Graphite-Reinforced PA6 Polymer Composites. Arabian Journal for Science and Engineering. 1-11.
• [18] Satheeskumar, S., Kanagaraj, G. 2016. Experimental investigation on tribological behaviours of PA6, PA6-reinforced Al2O3 and PA6-reinforced graphite polymer composites. Bulletin of Materials Science, 39(6), 1467-1481.
• [19] Yi-Lan, Y., Du-Xin, L., Gao-Jie, S., Ruo-Yun, L., Xin, D. 2016. Improvement in the tribological properties of polyamide 6: Talc, glass fiber,graphite, and ultrahigh-molecular-weight polyethylene. Journal of Thermoplastic Composite Materials, 29(4), 494–507.
• [20] Srinivas, C. L., Sarcar, M. M. M., Suman, K. N. S. 2012. Abrasıve wear propertıes of graphıte fılled PA6 polymer composıtes. International Journal of Mechanical Engineering and Robotics Research, 1(3), 157-162.
• [21] Jianping, G., Luedtke, W.D., Gourdon, D., Ruths, M., Israelachvili, J. N., Landman, U. 2004. Frictional Forces and Amontons’ Law: From the Molecular to the Macroscopic Scale. The Journal of Physical Chemistry B, 108, 3410-3425.
• [22] Gaurav, A., Amar, P., Rajesh, K.S. 2013. Parametric Optimization and Three-Body Abrasive Wear Behavior of Sic Filled Chopped Glass Fiber Reinforced Epoxy Composites . International Journal of Composite Material, 3(2), 32-38.
• [23] Suresha, B., Chandramohan, G., Renukappa, N.M., Siddaramaiah, H. 2007. Mechanical and Tribological Properties of Glass–Epoxy Composites with and Without Graphite Particulate Filler. Journal of Applied Polymer Science, 103, 2472-2480.
• [24] Yunxia, W., Fengyuan, Y. 2006. Wear Tribological properties of transfer films of PTFE-based composites. Wear, 261(11-12), 1359-1366.