Document Type
Article
Publication Date
6-1-2014
Abstract
Ceramics consisting of Al2O3 with a surface layer of Al2O3-10 vol% SiC have been fabricated by hot pressing. The residual compressive stress at the composite surface due to the difference in thermal expansion between the two layers has been measured experimentally by Cr3+ fluorescence microspectroscopy. The wear resistance in the severe wear regime of the two-layered samples was higher than those of a reference single-layer Al2O3-10 vol% SiC sample. The improvement in the wear resistance was due to a decrease in the amount of surface pullout which was attributed to the presence of the biaxial residual compressive stress in the surface layer of the specimens.
Keywords
Hot pressing, Spectroscopy, Wear resistance, Residual stress
Divisions
Dentistry
Publication Title
Tribology International
Volume
74
Publisher
Elsevier