Matériaux & Techniques
Volume 79, Number 12, 1991
|Page(s)||40 - 44|
|Published online||13 April 2017|
Effets de l’humidité sur le comportement des céramiques Al2O3, Si3N4 et PSZ en frottement à grande vitesse sur acier
Service Usure, Dpt Matériaux, CETIM
In order to study the effects of humidity on the tribological behaviour of the sliding couple ceramics/steel, wear tests were carried out on a pin-on-disk tribometer ceramic pin on steel disk, pressure : 0.25 MPa, speed : 2.5 to 50 m/s) with a variation of humidity from 50 % to 100%.
This variation of humidity, which had made lightly heavier the wear of some alumina ceramics when the speed was over 30 m/s, resulted in a large increase of the wear of Si3N4 at the speeds lower than 10 m/s. But in the case of PSZ, little effect of humidity was detected, even at 15 m/s where the wear rate was quite high due to the phase transformation.
The wear mechanisms of ceramics seemed very complicated with the change of humidity, since the temperature could be considerable at the interface of friction. The wear was influenced not only by the modification of ceramics properties, but also by that of metallic counter face.
© SIRPE 1991
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.