Laser Glazing of Plasma Sprayed Ni-Cr-Al-Y Alloy

1 November 1998

journal article
research article
Published by Taylor & Francis in Materials and Manufacturing Processes

Vol. 13 (6) , 829-839
https://doi.org/10.1080/10426919808935308

Abstract

Laser surface melting provides a unique opportunity to increase the density of the relatively porous microstructure found in plasma sprayed (PS) coatings. In the current investigation a plasma sprayed Ni-Cr-Al-Y alloy was surface melted using a CO₂ laser. Melted track width was found to be strongly influenced by laser power and weakly influenced by traverse speed over the range investigated. The microstructure of the laser glazed area was examined by various techniques including optical microscopy, scanning electron microscopy (SEM), electron probe microanalysis (EPMA), and energy dispersive x-ray analysis (EDAX). Refined microstructure was observed in the laser glazed region, and under high laser power (800 W) mixing of the coating with the substrate created metallurgical bonding.

Keywords

This publication has 4 references indexed in Scilit:

Laser glazing of vacuum plasma spray coated NARloy-Z
Surface and Coatings Technology, 1996
Laser Melting of Plasma Sprayed Ceramic Coatings
Surface Engineering, 1988
Surface treatment of plasma-sprayed ceramic coatings by a laser beam
Surface and Coatings Technology, 1988
Laser Melting of Plasma Sprayed Nicocraly Coatings
Surface Engineering, 1987