Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9802927 | International Journal of Refractory Metals and Hard Materials | 2005 | 7 Pages |
Abstract
Silicon nitride-based materials are applied to many tribological components because of their superior thermal and mechanical properties and corrosion resistance. The purpose of this study is to investigate the wear performance of modified silicon nitride which contained 3Â wt.% La2O3 and 3Â wt.% Y2O3. The relationships between microstructure and mechanical properties have been also addressed. Vickers microhardness and toughness were measured, the later being determined by means of the direct crack measurement method (DCM). Scanning electron microscopy technique (SEM) coupled with energy dispersive X-ray spectroscopy (EDS) was used for the morphological characterization of the samples as well as for the characterization of the wear scars. Wear properties were studied under a load of 10Â N by using the ball-on-disk tribometer. AISI 52100 steel balls and balls of WCÂ +Â 6% Co (6Â mm diameter) were used as static counterparts, respectively. Steady state friction coefficients of 0.66 and 0.62 were measured for the tribological pairs WCÂ +Â 6 % Co/Si3N4 and AISI 52100/Si3N4, respectively. The wear mechanism was determined in each case, and comparison between the wear performance of the traditional and modified silicon nitride is also presented.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
E. Carrasquero, A. Bellosi, M.H. Staia,