Nanosensors for Pressure and Temperature Mapping in Confined Lubricant Films

Sayed Albahrani (1) , David Philippon (1) , Michel Querry (1) , J-M Bluet (2) , Peter Reiss (3) , Philippe Vergne (1)

1 TMI - Tribologie et Mécanique des Interfaces
2 INL - S&N - INL - Spectroscopies et Nanomatériaux
3 SPRAM - UMR 5819 - Structures et propriétés d'architectures moléculaire

Pressure and temperature are two relevant parameters in the elastohydrodynamic lubrication (EHL) regime. For instance, the pressure may reach values up to 1-2 GPa inducing an important elevation of the lubricant viscosity. In addition, the temperature can rise up to 100°C due to sliding conditions.A new in situ experimental technique allowing local and simultaneous measurement of pressure and temperature in lubricated contacts is under development. This technique is based on the sensitivity of some photoluminescent nanoparticles (NP) to temperature and pressure variations.In this paper, the calibration of different semiconductor-based NP dispersed in lubricant is detailed and their potential use as nanosensors is discussed. Their respective temperature and pressure sensitivities (variations of the fluorescence wavelength) were calibrated using a high pressure diamond cell in which temperature can be controlled precisely

Keywords: elastohydrodynamic lubrication; in situ techniques; pressure; temperature; mapping; nano sensors

Domains: Other

Sayed Albahrani, David Philippon, Michel Querry, J-M Bluet, Peter Reiss, et al.. Nanosensors for Pressure and Temperature Mapping in Confined Lubricant Films. 2015 STLE Tribology Frontiers Conference, Society of Tribologists and Lubrication Engineers, Oct 2015, Denver, United States. ⟨hal-01222579⟩