Tribological behavior of Mg–3.5 vol% TiO2 composite at room and elevated temperatures
Year: 2025
Type: article
Abstract: Pure magnesium (Mg) and magnesium with 3.5 vol% titanium dioxide (Mg–3.5 vol% TiO2) samples were produced using powder metallurgy and extrusion processes. The mechanical properties of the samples were evaluated through shear punch and hot hardness tests over a temperature range of 25 to 200 ºC. The dry tribological behavior of samples were investigated using a pin-on-disk tribometer at a sliding speed of 0.4 m/s, a sliding distance of 1000 m under normal loads of 5–100 N at room temperature and at the elevated temperature of 150 ºC. The addition of TiO2 improved wear resistance, hardness, and strength. However, both pure Mg and the composite showed approximately the same wear rate under normal loads of 5 N and 20 N at room temperature, as well as under normal load of 5 N at 150 ºC. As the normal load was increased, the composite sample exhibited superior wear behavior compared to pure Mg. Additionally, it was found that oxidation was the primary mechanism at room temperature for both materials. The oxidation mechanism was also identified for Mg–3.5 vol% TiO2 at a temperature of 150 ºC under loads ranging from 5 to 20 N. However, under higher loads, severe plastic deformation became the dominant mechanism.
Authors: Sh. Arbabi, H.M. Ghasemi, R. Mahmudi
Institution: University of Tehran
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,640
OpenAlex ID: W4413119369