| Pacific Rim Symposium on Surfaces, Coatings and Interfaces (PacSurf 2016) | |
| Thin Films | Wednesday Sessions |
| Session TF-WeP |
| Session: | Thin Films Posters Session II |
| Presenter: | Ronaldo Cozza, University Center of FEI, Brazil |
| Authors: | R.C. Cozza, University Center of FEI, Brazil G.H.B. Donato, University Center of FEI, Brazil |
| Correspondent: | Click to Email |
The purpose of this work is to study the influence of the abrasive slurry concentration on the coefficient of friction of thin films submitted to micro-abrasive wear. Initially, a micro-abrasive wear testing by free rotative ball equipment was designed and constructed, able to measure the coefficient of friction on the tribo-system “thin-film – abrasive slurry – ball”. After, experiments were conducted with thin films of TiN, TiC, CrN, TiAlN, HfN, ZrN, TiZrN, TiN/TiAl (multi-layer), TiHfC and TiHfCN, balls of AISI 52100 steel and abrasive slurries prepared with black silicon carbide (SiC) particles + glycerin. All tests were conducted without interruption, and the abrasive slurry was continuously agitated and fed between the ball and specimen. The tangential (T) and normal (N) forces were monitored throughout the tests and the coefficient of friction (µ) was calculated by the equation µ = T/N. The results obtained have shown that the concentration of abrasive slurry affected the actions of the abrasive wear modes (grooving abrasion or rolling abrasion) and, consequently, the magnitude of the coefficient of friction: high abrasive slurry concentration was related with low coefficient of friction.