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MICROSTRUCTURAL INVESTIGATION AND SELECTED PROPERTIES OF NI-CR-RE-AL2O3 COATINGS DEPOSITED BY MEANS OF HVOF THERMAL SPRAYING

1 SKOWROŃSKA Beata
Co-authors:
1 GOLAŃSKI Dariusz 2 CHMIELEWSKI Marcin 1 CHMIELEWSKI Tomasz
Institutions:
1 Warsaw University of Technology, Faculty of Production Engineering, Warsaw, Poland, EU, beata.skowronska@pw.edu.pl
2 Łukasiewicz Research Network, Centre of Electronic Materials Technology, Warsaw, Poland, EU, marcin.chmielewski@imif.lukasiewicz.gov.pl
Conference:
30th Anniversary International Conference on Metallurgy and Materials, Brno, Czech Republic, EU, May 26 - 28, 2021
Proceedings:
Proceedings 30th Anniversary International Conference on Metallurgy and Materials
Pages:
633-638
ISBN:
978-80-87294-99-4
ISSN:
2694-9296
DOI:
https://doi.org/10.37904/metal.2021.4193
Published:
15th September 2021
Proceedings of the conference have already been published in Scopus and we are waiting for evaluation and potential indexing in Web of Science.
Metrics:
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Abstract

The paper presents selected results of microstructural investigation of NiCr-Re with the addition of aluminium oxide coatings, deposited by means of HVOF thermal spray. The substrate made of 16Mo3 chromium molybdenum boiler steel was coated with a powder material of Oerlikon Amdry 4535 80% Ni, 20% Cr, 20÷45 μm, to which 1% of metallic rhenium and 10% of Al2O3 was dopped using the high energy milling method in a ball mill. The Rhenium and alumina are an addition in shape of inclusions that improves the heat resistance of alloys, creep, and high temperature oxidation resistance. Alloys with the addition of rhenium and alumina are widely used in the power industry. Metallographic microscopic examinations, microhardness tests and surface profilometry were carried out.

Keywords: Thermal spraying, protective coating, heat resistance, microstructure, Re addition, rhenium, coating

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