Study of boundary film formation with overbased calcium sulfonate by PM-IRRAS spectroscopy
1994; Elsevier BV; Volume: 252; Issue: 2 Linguagem: Inglês
10.1016/0040-6090(94)90782-x
ISSN1879-2731
AutoresS. Giasson, Thierry Palermo, Thierry Buffeteau, Bernard Desbat, J. M. Turlet,
Tópico(s)Tribology and Wear Analysis
ResumoOverbased calcium sulfonates can be used to prevent wear occurring during friction phenomenon by forming a boundary film on friction surfaces. The formation mechanism of the boundary film was investigated using polarization modulated infrared reflection absorption spectroscopy. It appears that the film mainly consists of CaCO3 crystallites and that the calcium sulfonate chains are expelled from the friction zone. The expulsion of the sulfonate chains occurs in a relatively fast step and is followed by the adsorption and the packing of calcium carbonate particles on the surface. This adsorbed mineral phase rapidly crystallises into a calcite lattice with the c axis preferentially oriented perpendicular to the surface.
Referência(s)