Alumina/graphene composite in friction and wear tests at elevated temperatures
Agnieszka Wojteczko, Grzegorz Wiązania, Katarzyna Michalska, Maciej Łuszcz, Kamil Wojteczko, Paweł Rutkowski, Magdalena Ziąbka, Marcin Kot, Zbigniew Pędzich
Quarterly No. 3, 2018 pages 162-166
DOI:
keywords: alumina, alumina/graphene composite, wear, friction, ball-on-disc
abstract Alumina materials are of great interest due to their high wear resistance, resistance to corrosion, high strength and low friction. However, studies show that a graphene addition can significantly reduce wear and friction. Even a small addition of platelets results in noticeable changes in the material properties. The presented work describes the results of the ball-on-disc test conducted on two friction pairs: alumina-alumina and alumina/graphene composite - alumina. The tests were conducted at four temperatures: 20, 150, 300 and 500°C in air. Surface profile geometry measurements after the test were used to determine the wear rate. Observation of the surface microstructure after friction was carried out using a scanning electron microscope. The tests showed improvement in the wear resistance and a decrease in the friction coefficient of the composite tested at room temperature compared to pure alumina, while the use of elevated temperatures adversely affected the composite.