Structural analysis of Fe-Al coatings applied by gas detonation spraying

Tomasz Chrostek

Uniwersytet Warmińsko-Mazurski w Olsztynie


Abstract

The article analyzes the formation of oxide phases in the structure of intermetallic FeAl coatings applied by gas detonation spraying (GDS). The structural properties of powder charge particles and FeAl coating formed during GDS were determined. The effect of the GDS process on phase changes in FeAl coating applied under controlled conditions was examined. The results indicate that at specific process parameters, FeAl powder particles are strongly oxidized in a hot stream of gases produced during supersonic combustion. Powder particles undergo very strong plastic deformation during the process, and the resulting multiphase coating contains oxide phases that form thin membranes along grain boundaries. The results of structural analyses and microanalyses of chemical composition (SEM/EDS) and phase composition (XRD) indicate that strongly heated FeAl particles undergo surface oxidation during GDS and are transformed into grains (splats) when they collide with a steel substrate. The produced FeAl coating has a multi-layered and multi-phase structure characteristic of the sprayed material, and it contains thin oxide layers, mainly Al2O3.

Keywords:

Gas Detonation Spraying, Fe-Al, intermetallic alloys, Al2O3

BOJAR Z., SENDEROWSKI C., DUREJKO T. 2002. Structure and tribological properties of FeAl-based intermetallic coatings sprayed on steel substrate, International Journal of Applied Mechanics and Engineering 7, 335-340.   Google Scholar

CHROSTEK T., BRAMOWICZ M., RYCHLIK K., WOJTKOWIAK A., SENDEROWSKI C. 2019. Influence of gas detonation spraying parameters on the geometrical structure of Fe-Al intermetallic protective coating, Technical Sciences 3(22), 249-262.   Google Scholar

FIKUS B., SENDEROWSKI C., PANAS A.J. 2019. Modeling of Dynamics and Thermal History of Fe40Al Intermetallic Powder Particles Under Gas Detonation Spraying Using Propane-Air Mixture, Journal of Thermal Spray Technology 28(3), 346-358.   Google Scholar

HEJWOWSKI T. 2013. Nowoczesne powłoki nakładane cieplnie odporne na zużycie ścierne i erozyjne, Monografie – Politechnika Lubelska, Lublin.   Google Scholar

NIEWIELKI G., JABŁOŃSKA M. 2007. Charakterystyka i zastosowanie intermetali z układu Fe-Al, Inżynieria Materiałowa 2, 43-47.   Google Scholar

NIKOLAEV YU.A., VASIL’EV A.A., UL’YANITSKII B.YU. 2003. Gas Detonation and its Application in Engineering and Technologies (Reviev), Combustion, Explosion and Shock Waves 39(4), 382-410.   Google Scholar

SENDEROWSKI C. 2015. Żelazowo-aluminiowe intermetaliczne systemy powłokowe uzyskiwane z naddźwiękowego strumienia metalicznego – monografia, Warszawa.   Google Scholar

SENDEROWSKI C., DUREJKO T., ZASADA D., NAPADŁEK W., BOJAR Z. 2016. Structure and properties of the FeAl (HVOF, HVAF, DGS) coating for power industry, Inżynieria Materiałowa 6(214), 283-288.   Google Scholar

ULIANITSKY V, SHTERTSER V., ZLOBIN S., SMUROV I. 2011. Computer-controlled detonation spraying: from process fundamentals toward advanced applications, Journal of Thermal Spray Technology 20(4), 791-801.   Google Scholar

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Published
2020-12-04

Cited by

Chrostek, T. (2020). Structural analysis of Fe-Al coatings applied by gas detonation spraying. Technical Sciences, 23(3), 221–232. https://doi.org/10.31648/ts.6114

Tomasz Chrostek 
Uniwersytet Warmińsko-Mazurski w Olsztynie



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Copyright (c) 2020 Tomasz Chrostek

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