|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||In Operando Nano- and Micro-mechanical Characterization of Materials with Special Emphasis on In Situ Techniques
||Deformation Induced Structural Changes in Solid and Liquid Lubricant Films Studied by In Situ Raman Tribometry
||Praveena Manimunda, Richard R Chromik, Seong H Kim, Ala Al-Azizi, Sanjay K Biswas, Vikram Jayaram
|On-Site Speaker (Planned)
Micro-Raman systems enable chemical imaging at high spatial resolution and consequently are promising analysis tools in the field of materials tribology. Two novel in situ techniques using Raman spectroscopy were used to understand the chemical, structural, and physical interactions that govern friction and wear of two tribological systems – one in solid-solid contact and another with lubricated conditions. For solid-solid contact, a through-counterface in situ Raman tribometer was used to study the physiochemical changes associated with the sliding of hydrogenated diamond-like carbon (H-DLC) and sapphire counter-surface at different atmospheric conditions. For lubricated contacts, the sensitivity of the conventional Raman spectrometer was further improved by adapting total internal reflection geometry to generate Raman signal. The rheology of a nanometer thick poly (alpha-olefin) base oil (PAO) film in a sliding point contact was investigated by total internal reflection (TIR) Raman spectroscopy.
||Planned: A print-only volume