Title: Bridging tribology and microrheology of thin films
Authors: Clasen, Christian ×
Kavehpour, H. Pirouz
McKinley, Gareth H #
Issue Date: 2010
Series Title: Applied Rheology vol:20 issue:4
Article number: 45049
Abstract: An enhanced version of the flexure-based microgap rheometer (FMR) is described which enables rheological measurements in steady state shearing flows of bulk fluid samples of PDMS with an absolute gap separation between the shearing surfaces of loo nm-100 mu m. Alignment of the shearing surfaces to a parallelism better then 10(-7) rad allows us to reliably measure shear stresses at shear rates up to 10(4) s(-1) At low rates and for shearing gaps < 5 mu m the stress response is dominated by sliding friction between the surfaces that is independent of the viscosity of the fluid and only determined by the residual particulate phase (dust particles) in the fluid. This behaviour is similar to the boundary lubrication regime in tribology. The absolute gap control of the FMR allows us to systematically investigate the flow behaviour at low degrees of confinement (gap separations too nm-2 mu m) that cannot be accessed with conventional (controlled normal load) tribological test protocols.
ISSN: 1430-6395
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Soft Matter, Rheology and Technology Section
× corresponding author
# (joint) last author

Files in This Item:
File Description Status SizeFormat
CCJ26_2010_Clasen_Kavehpour_McKinley_Applied_Rheology.pdf Published 496KbAdobe PDFView/Open Request a copy

These files are only available to some KU Leuven Association staff members


All items in Lirias are protected by copyright, with all rights reserved.

© Web of science