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Proceedings Paper

Hot corrosion resistance of laser beam remelted ceramic coatings
Author(s): Krystyna Kobylanska-Szkaradek; Lucjan Swadzba
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Paper Abstract

The paper examines the influence of laser remelting of Al2O3-Ni and Al2O3-Ni+CrAl ceramic layers spread on creep-resisting alloy by plasma-spray processing, upon the quality of ceramic coatings which are the thermal barrier and high temperature corrosion protection of these alloys. It has been stated that laser beam scanning of 0.103 X 109 W/m2 power density ensures good quality of coatings at the beam shift rate equal 1 - 2 m/min. At smaller scanning rate, laser remelted ceramic layer spalls and chips. The examination of corrosion resistance in the medium of sulphur compounds has been carried out on plasma-sprayed samples which underwent chromoaluminizing and laser remelting. Diffusive chromoaluminizing and laser beam remelting proved advantageous for corrosion resistance of the alloy. An alloy without coating and with coating but without additional chromoaluminizing showed very low corrosion resistance in the medium of sulphur compounds.

Paper Details

Date Published: 3 October 1997
PDF: 8 pages
Proc. SPIE 3187, Laser Technology V: Applications in Materials Sciences and Engineering, (3 October 1997); doi: 10.1117/12.287822
Show Author Affiliations
Krystyna Kobylanska-Szkaradek, Silesian Technical Univ. (Poland)
Lucjan Swadzba, Silesian Technical Univ. (Poland)

Published in SPIE Proceedings Vol. 3187:
Laser Technology V: Applications in Materials Sciences and Engineering
Wieslaw L. Wolinski; Jerzy Kusinski, Editor(s)

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