The effect of sintering time on the tribological properties of automotive brake pads

Öz

In this study, the effect of sintering temperature on the physical, chemical and tribological effects of sintered automotive friction materials was investigated. Using the powder metallurgy method, 3 different samples were produced with the codes A1, A6 and A11. Mixing, pressing and sintering processes were applied respectively as production steps. Mixing time is 90 minutes, speed is 15 rpm. The pressing pressure is 250 MPa and the duration is 1 min. The sintering temperature was 800 °C and the sintering time was 1, 6 and 11 hours, respectively. The sintering process was carried out in the sintering mold using Argon gas. As the sintering time increased, it was observed that there was an increase in the time-dependent friction coefficients of the samples. Increasing the sintering time also increased the density of the samples. As the sintering time increased, the gap in the sample decreased, as it provided better bonding of the dustsers.

Anahtar Kelimeler

• Brake pad
• friction
• sintering time
• tribology

Kaynakça

1. Dhir, D. K., “Thermo-mechanical performance of automotive disc brakes”, Materials Today:Proceedings, 5, 1, 1864–1871, 2018.
2. Nathi, G.M., Charyulu, T.N., Gowtham, K., Reddy, P.S., “Coupled structural/ thermal analysis of disc brake”. International Journal of Research in Engineering and Technology, 1, 4, 539-553, 2012.
3. Borawski, A., “Conventional and unconventional materials used in the production of brake pads – review”. Journal Science and Engineering of Composite Materials, 27, 1, 374-396, 2020.
4. Kumar, V., Kumaran, S., “Friction material composite: types of brake friction material formulations and effects of various ingredients on brake performance–a review”. Materials Research Express, 6, 8, 082005, 2019.
5. Xiao, X., Yin, Y., Feng, X., Lu, L., Feng, X., “Review on the friction and wear of brake materials”. Advances in Mechanical Engineering, 8, 5, 1-10, 2016.
6. Sundarkrishnaa, K., L., “Friction material composites copper-/metal-free material design perspective”, Springer Series in Material Science, 2015.
7. Dante, R., C., “Handbook of friction material”, Woodhead Publishing, 2016.
8. Yusubov, F., “Optimum design of brake friction composites”, Jurnal Tribologi 30, 133-148, 2021.

9. Boz, M., Kurt, A., “The effect of Al2O3 on the friction performance of automotive brake friction materials”, Tribology International, 40, 7, 1161-1169, 2007.
10. Boz, M., Kurt, A., “The influence of zinc on frıctıon-wear performance of powder metal brake frıctıon materials”, Journal of the Faculty of Engineering and Architecture of Gazi University, 21, 1, pp. 115-121, 2006.
11. Almomani, M.A., Shatnawi, A.M., Alrashdan, M.K., “Effect of sintering time on the density, porosity content and microstructure of copper – 1 wt. % silicon carbide composites”, Advanced Materials Research, 1064, pp 32-37, 2015.
12. Akkurt, O., Altıntaş, A., Çavdar, P.S, Çavdar, U., “Effect on the mechanical properties of sintering process of aluminium alloys”, International Scientific and Vocational Journal, 3, 2, 85-91, 2019.
13. Aliuzzaman, M., Haque, M.M., Ferdous, M.J., Hoque, S.M., Hakim, M.A., “Effect of sintering time on the structural, magnetic and electrical transport properties of Mg0.35Cu0.20Zn0.45Fe1.94O4 ferrites”, World Journal of Condensed Matter Physics, 4, 1, 13-23, 2014.
14. Boz, M., Kurt, A., “The influence of zinc on friction-wear performance of powder metal brake friction materials”, Journal of the Faculty of Engineering and Architecture of Gazi University, 21, 1, 115-121, 2006.
15. Berek, S., “Effects of quartz and diatomite contributions on the bronze linings wear properties”, Master's thesis, Sakarya University Institute of Science and Technology, Sakarya, 2010.
16. Albayrak, B., “Production of bronze linings and performance tests”, Master's thesis, Sakarya University Institute of Science and Technology, Sakarya, 2009.
17. Singaravelu, L., “Development of frıctıon materıals through powder metallurgy”, Doctoral Thesis, Indian Instıtute of Technology Roorke, 2007.
18. Leonardi, M., Alemani, M., Straffelini, G., Gialanella, S., “A pin-on-disc study on the dry sliding behavior of a Cu-free friction material containing different types of natural graphite”, Wear, 442-443, 2020.
19. Wahlström, J., Söderberg, A., Olander, L., Jansson, A., Olofsson, U., “A pin-on-disc simulation of airborne wear particles from disc brakes”, Wear, 268, 5-6, pp. 769-769, 2010.
20. Wojciechowski, A., Gołowicz, A., Michalski, R., “Influence of the form of copper in the friction material of disc brakes on the coefficient of friction and wear in rig tests”, The Archives of Automotive Engineering – Archiwum Motoryzacji, 62, 4, 77–88, 2013.