Nanoscale Friction Measurements Up to 750 °C

J. F. Smith, V. M. Vishnyakov, M. I. Davies, B. D. Beake

Research output: Contribution to journalArticle

7 Citations (Scopus)

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 languageEnglish
Pages (from-to)455-463
Number of pages9
JournalTribology Letters
Volume49
Issue number3
Early online date13 Jan 2013
DOIs
Publication statusPublished - 1 Mar 2013
Externally publishedYes

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