Abstract
Since their discovery, the MAX phases have elicited engineering interest as potential choices for wear resistant parts. One such compound is Ti3AlC2 with nano-layered structure, low density (4.25 g/cm3), good oxidation resistant and self-lubrication properties. The purpose of this investigation was to evaluate the dominant effect of the A-site solid solution elements addition on dry sliding characteristics of Ti3AlC2 against 0.45% C steel (S45C) disk, a material which is widely used in wear-critical applications such as impeller, gear and axles. Dry sliding tribological behaviors of hot-pressed Ti3Al0.94C2, Ti3Al0.78Sn0.22C2 and Ti3Al0.67Si0.28C2 solid solutions were conducted using a block-on-disk type tester at surface sliding speed range from 10 to 30 m/s and in the normal load range from 20 to 80 N. The results show that friction coefficient of Ti3Al0.94C2 is higher than that of Ti3Al0.78Sn0.22C2, but lower than that of Ti3Al0.67Si0.28C2. However, the change in wear rate as a function of normal load for different sliding speed shows almost reversed trend. Difference in the phase composition of friction films were found to be responsible for observed change in tribological behaved after partial substitution of Al in Ti3AlC2 with Sn and Si. This study shows that friction coefficient of Ti3AlC2 can be adjusted from 0.2 to 0.38 by partially substituting Al with Si and/or Sn.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
