Abstract
A new experimental capability for elevated temperature nanoscale friction measurement is described. Its stability and resolution were demonstrated in two case studies up to 750 °C. A stainless steel probe was used to study friction between steel and glass at 25, 200 and 400 °C. Friction forces were calibrated at temperature. The friction coefficient increased between 25 and 200 °C, but stickslip was dominant at 400 °C due to chemical interaction between the stainless steel probe and the glass. This was verified by scanning Energy Dispersive X-ray Spectroscopy analysis. A WCCo probe was used to study friction on a range of TiN-based and Cr54Al20C26 (so named MAX-phase composition) coatings at 25, 400 and 750 °C. A maximum in friction coefficient was observed at 400 °C. The decrease in friction at 750 °C was associated with the formation of lubricating surface oxides and oxidation- associated surface roughening.
Original language | English |
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Pages (from-to) | 455-463 |
Number of pages | 9 |
Journal | Tribology Letters |
Volume | 49 |
Issue number | 3 |
Early online date | 13 Jan 2013 |
DOIs | |
Publication status | Published - 1 Mar 2013 |
Externally published | Yes |