Optimization of spraying process and laser treatment of CoNiCrAlY |
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| Authors: | E Lugscheider D Hofmann A R Nicoll |
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| Affiliation: | (1) Material Science Institute, Aachen University of Technology, Aachen, Germany;(2) Plasma-Technik AG, Wohlen, Switzerland |
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| Abstract: | This article describes the investigation of a new generation of vacuum plasma sprayed CoNiCrAlY coatings on NiCr20Ti in the
sprayed as well as the laser-treated condition. The aim of the study was the improvement of MCrAlY coating properties by modifying
the microstructure through laser remelting with 5-kW Co2: lasers. Parameter analysis and optimization was carried out for the vacuum plasma spraying process, as well as for the laser
remelting technique. The effect of the laser treatment on microstructure, quality of the coatings, and oxidation as well as
hot gas corrosion behavior are reported. |
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| Keywords: | CoNiCrAlY coating element distribution hot corrosion tests laser treatment vacuum plasma spraying |
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