Laser Surface Treatment Of A1203 Coatings Plasma Sprayed
Price
Free (open access)
Transaction
Volume
8
Pages
8
Published
1995
Size
739 kb
Paper DOI
10.2495/SURF950071
Copyright
WIT Press
Author(s)
E. Fernandez, J.M. Cuetos, M. Cadenas, R. Vijande & H.J. Monies
Abstract
Laser surface treatment of A12O3 plasma sprayed coatings is studied in this paper from an experimental viewpoint. A CO2 laser operating in continuous mode is used to refuse a thick layer of 0,3 mm thickness. The changes in microstructure, microhardness and adherence caused by the laser treatment allows a better wear behaviour of this coating after laser treatment. The initial porosity of A12O3 plasma sprayed coating is considerably reduced after laser treatment. However in this case few vertical cracks appear. This fact can be reduced by using a preheating of the specimens to decrease the thermal effects of the laser treatment. 1 Introduction Plasma spray is a technique to obtain ceramic coatings used in many engineering applications to improve
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