Engineering and Technology Journal

Abstract

Laser sealing of zirconia-6.5 wt% yttria partially stabilized zirconia (YPSZ) plasma
sprayed layers were examined for both plan views and transverse sections. Scanning
electron microscopy (SEM) has been used extensively to characterize the general features
and microstructure of the layers under optimum laser processing conditions. The laser beam
is shown to be effective in modified the plasma sprayed layers by sealing the porosity and
decrease the roughness. Thermal shock resistance test reveals that sealed layers have been
an excellent resistance to cracks formation parallel to the surface.